Engine Internal Failure Risk - Stall, Power Loss, or Fire
engine knocking; engine stalls; sudden loss of power; check engine light; engine failure recall
2015-2021 Subaru WRX and WRX STI owners: engine failure, CVT shudder, fuel pump recall, and 5 NHTSA campaigns. California lemon law rights explained.
You bought the WRX because no other car at the price could match it. All-wheel drive, a turbocharged boxer engine, a proper manual gearbox: for under $30,000, it was the performance-car deal of the decade. Subaru sold over 140,000 VA-generation WRX and WRX STI units in the United States between 2015 and 2021. The badge promised engineered reliability to go with the rally-bred performance. For many owners, it delivered. For a significant minority, the VA-generation WRX became a source of frustration, large repair bills, and manufacturer warranty denials that felt more like stonewalling than service.
The most serious documented problems fall into two categories. First, internal engine failure: the FA20DIT in the standard WRX and the EJ257 in the STI both have well-documented connecting rod bearing and ringland failure patterns that Subaru has never addressed with a recall. When an engine fails, dealers frequently deny warranty coverage by alleging misuse or track driving, leaving owners with $6,000-$10,000 engine replacement bills on cars still within the powertrain warranty window. Second, transmission trouble: CVT-equipped WRX models suffer from a shudder and slip issue that Subaru acknowledged in TSB 17-147-18R but that many owners report was only temporarily resolved by a fluid change before the symptoms returned.
On top of the mechanical concerns, the VA WRX accumulated five NHTSA recalls covering brake-assist reprogramming, turbocharger duct cracking with fire risk, subwoofer wiring with fire risk, fuel pump failure, and backup camera failure, the last two spanning the full 2015-2021 production run. If your WRX has visited the dealer repeatedly for any of these concerns, California's Song-Beverly Consumer Warranty Act may give you the right to a replacement vehicle or a full refund. This page documents what went wrong, what Subaru knew, and what you can do about it.
The issues owners report most, ranked by severity — each one verified against a cited NHTSA source.
engine knocking; engine stalls; sudden loss of power; check engine light; engine failure recall
warning light; recall notice; repeated dealer repair
engine knock or rod knock at idle; engine suddenly seizes; metal shavings or flakes in oil; check engine light with misfire codes; loss of compression on one or more cylinders; white or blue smoke from exhaust after high-RPM driving; oil pressure warning light; engine failure at 20,000-60,000 miles with no warning
piston slap at cold start; engine misfire under boost; blue or gray smoke from exhaust; sudden loss of power under hard acceleration; rod knock after high-RPM pull; oil consumption increasing over time; check engine with cylinder-specific misfire codes; engine dies at high RPM with no restart
brake pedal problem; reduced braking; unexpected braking; brake warning light
engine stalls while driving; vehicle will not start; loss of power; fuel pump recall
A settled Margarian Law case on this exact model, published with the actual settlement math.
Open any defect for the symptoms and why it matters for a California lemon-law claim. Each is tied to a cited NHTSA source.
brake pedal problem; reduced braking; unexpected braking; brake warning light
A brake or driver-assist malfunction that causes reduced brake assist or unexpected braking events is a safety defect under California Song-Beverly — impaired braking directly threatens occupant safety. If the dealer's reprogramming remedy (per NHTSA recall WQS-54) fails to eliminate the unexpected braking on a return visit, that subsequent repair attempt counts toward the lemon-law two-attempt safety threshold. Owners should document every instance of reduced braking or unintended activation in writing, including date, speed, and conditions, before each dealer visit.
Subaru will notify owners, and dealers will reprogram the driver assist system, free of charge. The recall began on July 20, 2015. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQS-54.
engine knocking; engine stalls; sudden loss of power; check engine light; engine failure recall
A cracked turbocharger air intake duct that can vent fuel vapors into the engine bay creates a fire risk, placing this recall in the top tier of safety defects under Song-Beverly. Even if the recall remedy (duct inspection and replacement) is completed, any owner who experienced engine stall, power loss, or fire-related symptoms prior to the repair has documented evidence of a safety-impairing defect. If the repair was delayed, or if a replacement duct also cracked on a subsequent inspection, a lemon-law claim is strengthened significantly. Retain the recall completion notice and every related repair order.
Subaru will notify owners, and dealers will inspect the turbocharger air intake duct, and replace it as necessary, free of charge, depending on the lot number found on the duct. The recall began April 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall
warning light; recall notice; repeated dealer repair
The subwoofer wiring recall (NHTSA 17V381) addresses a trunk-area electrical short that can cause a fire — a fire risk qualifies as Catastrophic and is the most compelling basis for a lemon-law demand. If a 2015 WRX owner experienced a burning smell, smoke, or electrical malfunction in the trunk area before receiving the recall notice, and the dealer required multiple visits to correctly install the wire retainer clip, each visit counts as a separate repair attempt under Song-Beverly. The fire-risk nature of this defect also supports the argument that even one repair attempt is insufficient to provide a vehicle that is "free from defects" as warranted.
Subaru will notify owners, and dealers will inspect the subwoofer wire, install a wire retainer clip, and, as necessary, replace the subwoofer, free of charge. The recall began October 31, 2017. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTQ-76.
engine stalls while driving; vehicle will not start; loss of power; fuel pump recall
An engine stall caused by a failing low-pressure fuel pump — especially at highway speed — is a loss-of-drive safety defect under Song-Beverly. NHTSA recall 21V034 / Subaru WRG-21 covers 2018-2019 WRX; if the dealer was unable to source the replacement pump promptly, resulting in extended out-of-service time, that time counts toward the 30-cumulative-day lemon-law trigger. Owners who stalled in traffic before the recall was completed have an especially strong claim, as the stall itself demonstrates the defect was active during the warranty period. Document any tow receipts, rental car receipts, or stranding incidents.
Dealers will replace the low-pressure fuel pump, free of charge. Owner notification letters were mailed September 24, 2021. Subaru and Toyota owners may call customer service at 1-844-373-6614. Subaru's number for this recall is WRG-21.
backup camera blank; screen goes black in reverse; rearview camera distorted
Federal Motor Vehicle Safety Standard 111 requires a functional rearview camera on vehicles equipped with one. A backup camera that goes blank — the exact defect addressed by recall NHTSA 22V538 — is not merely an inconvenience but a federal safety-compliance failure. Under Song-Beverly, a defect that compromises a federally mandated safety system is substantial impairment by definition. Because this recall spans the entire 2015-2021 WRX production run, owners who experienced camera failure before the recall was announced and visited the dealer without resolution may have multi-attempt evidence already in their service file. Check for any prior 'NFF' visits for 'backup camera blank' before the recall was issued — those visits count.
Dealers will inspect and replace the backup light switch, as necessary, free of charge. Owner notification letters were mailed September 16, 2022. Owners may contact Subaru's customer service at 1-844-373-6614. Subaru's number for this recall is WRE-22.
engine knock or rod knock at idle; engine suddenly seizes; metal shavings or flakes in oil; check engine light with misfire codes; loss of compression on one or more cylinders; white or blue smoke from exhaust after high-RPM driving; oil pressure warning light; engine failure at 20,000-60,000 miles with no warning
Engine seizure or connecting rod failure that recurs or cannot be repaired in a reasonable number of attempts — or that sidelines the vehicle for 30+ cumulative days — meets the Song-Beverly threshold for substantial impairment of use or safety. Because Subaru dealers often deny warranty coverage by alleging misuse, a pattern of warranty denials followed by re-failure is itself evidence of a defective condition the manufacturer refuses to remedy. Owners with documented repair attempts and mileage within the powertrain warranty window have a viable claim even when the initial denial stands.
Short-block or complete engine replacement. Subaru has not issued a recall or class-action settlement for FA20DIT internal failure. Warranty claims are frequently denied if dealer suspects track use or improper maintenance. Some owners have obtained engine replacement under powertrain warranty on first-time failures within warranty mileage.
piston slap at cold start; engine misfire under boost; blue or gray smoke from exhaust; sudden loss of power under hard acceleration; rod knock after high-RPM pull; oil consumption increasing over time; check engine with cylinder-specific misfire codes; engine dies at high RPM with no restart
A WRX STI that suffers engine seizure within the powertrain warranty window, is brought in for repair, and is either denied warranty service or repaired and fails again presents a textbook Song-Beverly scenario. The engine's documented susceptibility to ringland failure under normal spirited use — the type of driving the vehicle is marketed to support — makes the 'misuse' denial difficult to sustain when the vehicle is otherwise stock. Multiple repair attempts or cumulative out-of-service days exceeding 30 within 12 months or 18,000 miles of any repair attempt are the key metrics to document.
Complete engine replacement. No factory recall or extended warranty program exists for EJ257 ringland failure. Subaru dealers routinely deny warranty coverage citing misuse, improper fuel, or aftermarket modifications even on stock vehicles. Some owners have succeeded in warranty claims documenting exclusive use of 91+ octane and stock tune.
shuddering or vibration at 30-45 mph on light throttle; transmission hesitation when coming to a stop; jerking or lurching during low-speed maneuvers; whining or grinding noise from transmission; slipping under acceleration; check engine light with transmission codes; complete loss of drive requiring tow
A CVT that continues to shudder or slip after two or more repair attempts — or that requires replacement and then re-fails — satisfies the Song-Beverly 'reasonable number of repair attempts' standard for a safety-or-use defect. Transmission shudder at highway speed also carries a secondary safety argument. Owners should retain every repair order documenting CVT fluid changes, sensor replacements, and software updates, as each visit counts as a separate repair attempt under California law.
Initial remedy: CVT fluid replacement with Subaru Lineartronic CVTF-II per TSB 17-147-18R. If shudder persists: CVT assembly replacement. Extended warranty coverage has been offered on some model years; owners should request written confirmation of coverage at the dealer.
touchscreen goes black and unresponsive while driving; head unit reboots spontaneously; Bluetooth drops connection repeatedly; navigation freezes mid-route; radio presets reset; backup camera does not display when in reverse; system requires hard reboot by holding power button; screen stays off after key-on
A recurring infotainment failure that also disables the rearview camera — a federally mandated safety system — elevates this issue from a mere annoyance to a safety defect under Song-Beverly. If the dealer documents three or more software updates that fail to resolve the freeze, or if the vehicle has been out of service 30+ cumulative days for this issue, the owner has a viable lemon-law basis. The overlap with the backup camera recall (iss-05) should be noted in any demand letter.
Software update via TSB 16-237-16 and follow-on bulletins. Gen 1 (2015-2017): dealer-applied update only, no OTA. Gen 2 (2018-2021): OTA update may be available. If freeze persists after software update, head-unit replacement may be required but is often denied outside warranty.
car brakes hard without any obstacle; sudden deceleration at highway speed; EyeSight warning light activates without reason; throttle cuts out during acceleration; adaptive cruise disengages unexpectedly; false alert on overpass, bridge shadow, or rain; near rear-end collision caused by sudden braking
Phantom braking at highway speed creates an immediate rear-end collision risk and constitutes a safety defect under Song-Beverly. A WRX that phantom-brakes and is brought in for recalibration and then brakes again on a subsequent occurrence is on a two-attempt repair clock for this specific defect. If the third incident occurs before repair, the vehicle may qualify under the two-or-more-repair-attempts-for-safety standard. Document every incident with date, location, speed, and conditions; dashcam footage is highly persuasive.
Camera recalibration per TSB 02-157-19 and EyeSight software update. Repeat recalibration may be needed. If problem persists, windshield replacement (to address camera mounting alignment) or stereo camera module replacement may be required.
battery dead in morning with no lights left on; car will not start after several days parked; jump starts work but battery dies again within days; dealer says battery tests normal; multiple battery replacements without resolution; check engine or EyeSight warning after battery event
A battery that dies repeatedly and cannot be reliably started is a defect that substantially impairs use under Song-Beverly — a car that won't start is not available for use. The 'cannot duplicate' dealer response does not protect the manufacturer from a lemon-law claim; what matters is the number of documented repair visits for the same symptom. Owners should request a copy of every repair order even when marked 'NFF' (no fault found), as each visit counts toward the repair-attempt total.
Software update for Starlink/EyeSight modules to reduce standby current draw. Battery replacement if capacity is degraded. In persistent cases, isolation of the parasitic circuit using an ammeter and module-by-module pull-down test. No recall or extended warranty issued for parasitic drain specifically.
clutch slips under boost; clutch pedal vibration or judder at engagement; burning smell from clutch at moderate use; clutch disc worn below service limit before 30,000 miles; difficulty shifting into gear; gear grinding; clutch fork or pressure plate failure
Clutch wear is normally a maintenance item excluded from lemon-law coverage. However, if the wear rate is abnormally accelerated compared to the manufacturer's stated service interval and the vehicle is used in a manner consistent with its intended purpose, an argument exists that the OEM clutch specification is defective for the application. Claims are stronger if the vehicle is documented as stock, driven under normal conditions, and the clutch fails before a reasonable wear-out mileage (typically below 30,000 mi). Supporting evidence from a Subaru-authorized dealer documenting premature wear is essential.
Clutch disc, pressure plate, and flywheel inspection and replacement as needed. OEM replacement is the warranty-eligible path; aftermarket upgrades are owner expense. No extended warranty or TSB specifically addresses premature OEM clutch wear.
rough idle that worsens over time; hesitation or stumble on acceleration; reduced power compared to when vehicle was new; occasional misfires on cold start; intake valve clatter or tick; check engine light with carbon-related misfire codes; oil consumption appearing alongside power loss
Carbon buildup is generally classified as a maintenance item by OEMs and is unlikely to support a standalone lemon-law claim. However, it becomes legally relevant when it is the root cause of misfires that were misdiagnosed and repeatedly 'repaired' without walnut blasting being performed, causing the vehicle to be out of service across multiple visits. In that scenario, the failure to correctly diagnose and remediate the defect within a reasonable number of attempts is the lemon-law basis, not the carbon buildup itself.
Walnut-shell blasting (intake valve cleaning) performed by a dealer or independent shop; typically needed every 30,000-60,000 miles. Cost: $300-$600 labor at a dealer. Some aftermarket catch-can installations reduce recurrence rate. Not covered under powertrain warranty as Subaru classifies it as a maintenance item.
remedy available
Subaru of America, Inc. (Subaru) is recalling certain 2015-2021 WRX vehicles. The backup light switch may corrode and become inoperative, which can result in the backup lights not illuminating and the rearview camera image not displaying when the vehicle is in reverse.
remedy available
Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2018 Forester, 2018-2020 Impreza, Legacy, Outback, 2018-2019 BRZ, WRX, and Toyota 86 vehicles. The low-pressure fuel pump inside the fuel tank may fail.
remedy available
Subaru of America, Inc. (Subaru) is recalling certain 2015 WRX and WRX/STI vehicles, equipped with an optional factory-installed subwoofer in the trunk. Items in the trunk may cause the subwoofer wiring to contact the subwoofer metal frame, possibly resulting in an electrical short.
remedy available
Subaru of America, Inc. (Subaru) is recalling certain model year 2015-2016 WRX vehicles manufactured April 10, 2015, to October 21, 2015, and Forester 2.0XT vehicles manufactured April 10, 2015, to October 20, 2015. The turbocharger air intake duct may crack and possibly result in an engine stall.
remedy available
Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy vehicles manufactured March 10, 2014, to April 16, 2015, Outback vehicles manufactured February 24, 2014, to April 16, 2015, Impreza vehicles manufactured September 9, 2014, to April 14, 2015, XV Crosstrek vehicles manufactured October 16, 2014, to April 15, 2015, and 2016 WRX vehicles manufactured March 23, 2015, and equipped with the Eyesight Driver Assist System. If the switch that activates the brake lights fails, the automatic pre-collision braking component of the driver assist system will not function.
Every item below comes from this vehicle's documented defects. The more you recognize, the more a free case review is worth your time.
California's Song-Beverly Consumer Warranty Act protects every buyer or lessee of a new vehicle sold in California. Here is what it means for WRX and STI owners:
WHAT QUALIFIES: Your WRX qualifies if Subaru or its dealers made two or more unsuccessful repair attempts for a safety defect — engine seizure, fuel pump stall, EyeSight phantom braking, or brake-assist failure — or four or more attempts for any defect such as CVT shudder or Starlink freeze. Thirty or more cumulative out-of-service days is an independent trigger regardless of repair count.
WHAT YOU CAN GET: Song-Beverly entitles you to a replacement vehicle or a full refund of your purchase price — taxes, registration, and finance charges included — minus a mileage offset. Subaru pays your attorney fees if you prevail, so a qualified lemon-law attorney can represent you at no upfront cost.
WRX-SPECIFIC: Engine failure denials citing 'misuse' on stock vehicles do not insulate Subaru from Song-Beverly. The fuel pump recall (21V034) and camera recall (22V538) each span large portions of the VA run; pre-recall dealer visits for those symptoms count as repair attempts. Timestamped repair orders, dated symptom logs, and dashcam footage are the strongest evidence in any WRX lemon-law file.
“Could not duplicate” doesn't mean the defect isn't real. Here's exactly what to do to protect a potential California lemon-law claim.
Document the moment it happens. Photos, video, and screenshots of any warning lights — with the date and the mileage.
Get a repair order every visit — even “found nothing.” That paperwork is the foundation of a claim.
Check your VIN at nhtsa.gov/recalls. Note any recall that has no available remedy yet.
Track your out-of-service days. California law counts the cumulative days your vehicle spends in the shop.
Keep loaner & rental records. Alternate-transport paperwork during long repairs matters.
Save everything in one place. Symptoms, dates, repair orders, and every repeat visit — the intermittent ones especially.
The 'cannot duplicate' or 'no fault found' repair order is a common obstacle in WRX cases. Here is what to do:
1. DOCUMENT BEFORE YOU GO. Write a dated note describing the symptom — what it sounds like, when it happens (cold start, highway speed, rain), and how often. Photograph or video any visible symptom. This becomes your pre-visit record.
2. REQUEST A ROAD TEST WITH THE TECHNICIAN. For CVT shudder, phantom braking, or engine knock, ask the service advisor in writing to have the technician drive the vehicle under conditions that trigger the symptom.
3. KEEP EVERY REPAIR ORDER — INCLUDING NFF ONES. A 'no fault found' visit still counts as a repair attempt under Song-Beverly if it was for the same complaint.
4. FOR ENGINE KNOCK: Ask the dealer to perform an oil pressure test and connecting rod bearing inspection per TSB 16-193-17. If they decline, document the refusal. A second opinion from a Subaru specialist who can document cold-start knock is highly useful.
5. FOR BATTERY DRAIN: Request a parasitic draw test. Ask for the milliamp reading on the repair order. Normal is below 50 mA; above 100 mA confirms an active drain.
6. FOR EYESIGHT PHANTOM BRAKING: Save dashcam footage from each event. Request recalibration per TSB 02-157-19 be documented on the repair order. A second post-recalibration incident places you at the two-attempt safety threshold.
7. TRACK OUT-OF-SERVICE DAYS. Thirty or more cumulative days in the shop — across any defects — is an independent lemon-law trigger under Song-Beverly.
The VA-generation WRX is a genuinely fun car that Subaru priced aggressively and sold in large volumes. That combination — performance expectations meeting entry-level pricing — created real engineering tension, and the defect record reflects it. The engine failure issues on both the FA20DIT and EJ257 are the most serious: they are costly, Subaru has never issued a recall, and the warranty denial practice around them is well-documented across thousands of NHTSA complaints. The CVT shudder is the next most impactful, affecting a large proportion of the non-manual WRX population. Five federal recalls — including two with fire risk — over a six-model-year run is not a small number. If your WRX has been back to the dealer three or more times for any of the defects on this page, a case review costs you nothing and may result in a full refund.
— The Margarian Law team
If your 2015-2021 Subaru WRX or WRX STI has been to the dealer multiple times for engine failure, CVT shudder, fuel pump stall, or backup camera failure, you may have lemon-law options. Margarian Law offers a free case review — if your case qualifies, Subaru pays the attorney fees.
The FA20DIT engine in your WRX is vulnerable to connecting rod bearing failure and ringland cracking — two related failure modes that can destroy the engine with little warning. Subaru issued TSB 16-193-17 acknowledging connecting rod bearing inspection procedures, but no recall or extended warranty covers the general population. The failure typically begins with a knock at idle, progresses to a louder rod knock under load, and ends in engine seizure. Subaru dealers commonly deny warranty coverage by citing track use or improper maintenance. If your WRX engine failed within the powertrain warranty window on a stock vehicle with documented maintenance, you may have a lemon-law claim under California Song-Beverly, particularly if the dealer refused repair or if a replacement engine also failed.
Subaru has not issued a recall or extended warranty specifically for EJ257 ringland failure. When the top ringland on an EJ257 piston shatters — typically triggered by detonation under boost — combustion gases enter the crankcase, rapidly contaminating the oil and destroying the rod bearings. The result is complete engine seizure requiring full engine replacement, typically $6,000-$10,000. Dealers routinely deny warranty coverage by alleging track use, improper fuel, or aftermarket modification, even on completely stock vehicles. If your STI suffered ringland failure while stock and within the 5-year/60,000-mile powertrain warranty, and the dealer denied coverage without objective evidence of misuse, a California lemon-law demand challenging that denial is a viable legal path. Document your fuel purchase receipts and any maintenance records showing proper 91+ octane use.
CVT shudder at 30-45 mph on light throttle is the most common Lineartronic TR690 complaint on CVT-equipped WRX models. Subaru acknowledged it in TSB 17-147-18R, which calls for draining and replacing the CVT fluid with Subaru Lineartronic CVTF-II. Many owners report the shudder returns within months of the fluid change, indicating the underlying belt-pulley surfaces are already worn. At that point, full CVT replacement is the only lasting fix. Request the fluid change first; if shudder returns, demand CVT replacement in writing. Keep every repair order, including any 'no fault found' visit. Subaru offered extended warranty coverage on some CVT complaints — ask your service advisor in writing whether your VIN is covered. Three fluid-change visits without resolution puts you on a strong footing for a California lemon-law claim.
Phantom braking — the EyeSight system applying full brakes without an obstacle — is a documented defect on 2018-2021 WRX and STI models equipped with EyeSight. It most commonly occurs under overpasses, in rain, at low sun angles, and against lane markings with low contrast. Subaru issued TSB 02-157-19 directing dealers to recalibrate the stereo cameras and update the EyeSight software. Some owners report the phantom braking returned within weeks of recalibration. No safety recall has been issued for this condition on the VA-generation WRX. If you have experienced phantom braking at highway speed, the event creates an immediate rear-end crash risk that rises to the level of a safety defect under Song-Beverly. Two phantom-braking incidents that triggered two separate dealer repair attempts places you at the two-attempt threshold for safety defects under California lemon law. Save any dashcam footage.
NHTSA recall 21V034 (Subaru internal code WRG-21) covers 2018-2019 WRX models for a low-pressure fuel pump that can fail causing the engine to stall while driving or refuse to start. The recall remedy is a dealer-performed fuel pump replacement at no cost. To check whether your VIN is included, visit nhtsa.gov/recalls or contact your Subaru dealer with your 17-digit VIN. If your WRX stalled while driving before the recall was completed — particularly at highway speed — that stall event is documented evidence of an active safety defect during the warranty period. If the dealer's pump replacement took an extended time to complete due to parts availability, leaving the vehicle out of service, those days count toward the 30-day lemon-law out-of-service threshold under Song-Beverly. Keep the recall completion paperwork and any tow receipts from the stall incident.
Yes, if your 2015-2021 WRX or WRX STI meets Song-Beverly thresholds, you can demand a full purchase-price refund or a comparable replacement vehicle. The thresholds are: (a) two or more unsuccessful repair attempts for a safety defect — engine seizure, fuel pump stall, EyeSight phantom braking, or brake-assist failure all qualify; (b) four or more unsuccessful repair attempts for any defect — CVT shudder, Starlink freeze, or recurring battery drain qualify; or (c) 30 or more cumulative days out of service for warranty repairs, regardless of defect type. Subaru must pay your attorney fees if you prevail, meaning you can retain a qualified lemon-law attorney at no upfront cost. The clock starts from the date of the first repair attempt and runs through the end of the warranty period or 18,000 miles from purchase, whichever comes later. Pull all your repair orders, identify how many visits addressed the same symptom, and add up the total out-of-service days. Those numbers determine whether you have a claim.