01
Electric Propulsion Cable / Power Loss Risk
EV propulsion warning; power loss; high-voltage cable recall
Catastrophic2022
OPEN HOURS MON–FRI | 9AM–6PM
2022-2026 Lexus NX 450h+ recalls, TSBs & lemon law rights. DC-DC converter fire, 12V battery drain, charger failure, LSS+ blackout. Free case review.
You paid a significant premium for the Lexus NX 450h+ — the brand's flagship plug-in hybrid crossover, promising luxury-tier refinement, up to 37 miles of all-electric range, and the full suite of Lexus Safety Sense+ driver assistance. The TNGA-K platform, shared with the Toyota RAV4 Prime, carries a reputation for engineering competence. The badge promises premium Japanese engineering backed by Lexus's vaunted dealer network. Instead, many AZ20-generation NX 450h+ owners have found themselves stranded by a dead 12-volt battery within weeks of purchase, staring at a charging port that refuses Level 2 current, or watching their advanced safety systems go completely dark for four critical seconds at highway speed.
Three formal NHTSA recalls cover 2022 NX 450h+ production: a structural weld defect allowing the front shock absorber to detach (22V238000), a stability control software error leaving VSC permanently disabled after restart (22V239000), and — most alarmingly — a DC-DC converter manufacturing defect creating a vehicle fire risk in cold weather (23V478000). Beyond the recalls, Lexus issued four technical service bulletins acknowledging a defective onboard charger, recurring head-unit software failures, a gear lever position sensor MIL defect, and — via Special Service Campaign 23LC01 — a camera software error cutting off all pre-collision braking, adaptive cruise, and lane-departure warning for approximately four seconds per event on ~3,970 early-production units.
NHTSA complaint records document 12-volt battery failures at under 5,000 miles, multiple emergency jumpstarts, and — in at least one documented case — total electrical power loss including loss of power steering and brake assist while driving at highway speed. These are not isolated incidents; they form a documented pattern across the AZ20 PHEV platform that California's lemon-law framework was specifically designed to address.
The issues owners report most, ranked by severity — each one verified against a cited NHTSA source.
EV propulsion warning; power loss; high-voltage cable recall
warning light; recall notice; repeated dealer repair
warning light; recall notice; repeated dealer repair
MIL / check engine light illuminated; Level 2 (J1772) charging inoperative or stopped mid-charge; no charge accepted from EVSE despite confirmed Level 2 power supply; DTC P0D2A19 or P1C1B00 stored; hybrid system operates on engine only; EV mode unavailable or range severely reduced
Touchscreen unresponsive or frozen mid-operation; navigation blacks out or routes incorrectly; Intelligent Voice Assistant fails to respond; Bluetooth phone/audio drops repeatedly; wireless Apple CarPlay or Android Auto disconnects; infotainment reboots unexpectedly; audio cuts out; user profiles reset; OTA update notification does not appear
Pre-collision warning and autonomous emergency braking temporarily deactivated; radar adaptive cruise control drops out unexpectedly; lane departure warning / LDA alert goes silent; instrument cluster warning message indicating safety system unavailable; all LSS+ functions resume after approximately 4-second reboot; phantom / nuisance pre-collision alerts before or after reboot event
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.
warning light; recall notice; repeated dealer repair
Missing spot-welds at the front shock absorber mounting area can cause the shock absorber to separate from the body, resulting in sudden loss of vehicle stability — a crash-risk defect. Under Song-Beverly, a recalled safety defect that requires structural weld repair (welding or panel replacement) is a complex, time-consuming fix; any vehicle that spends 30 or more cumulative days out of service during the repair cycle within the warranty period independently qualifies for a buyback or replacement without regard to the number of repair attempts.
Dealers will add welds to body panels or replace the body panels where welds have failed, free of charge. Owner notification letters were mailed on June 10, 2022. Owners may contact Lexus customer service at 1-800-331-4331. Lexus's number for this recall is 22LA02.
warning light; recall notice; repeated dealer repair
The Skid Control ECU software defect (recall 22V239000) allowed the Vehicle Stability Control system to remain permanently disabled after a driver-initiated VSC off command and vehicle restart — directly increasing crash risk. This is a confirmed FMVSS 126 noncompliance. Under California's Song-Beverly Act, a vehicle sold or leased with a federal safety standards noncompliance that the manufacturer knew about prior to sale strengthens the argument that the defect substantially impairs the vehicle's use, value, and safety from the moment of delivery.
Dealers will update the Skid Control ECU software, free of charge. Owner notification letters were mailed May 27, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 22TA03. Lexus' number for this recall is 22LA01.
EV propulsion warning; power loss; high-voltage cable recall
The DC-DC converter fire recall (23V478000) represents the most serious defect in the NX 450h+ record: a manufacturing-damaged current rectifying module that can short-circuit and cause the converter to overheat, creating a vehicle fire risk. The interim remedy — advising owners not to charge below 41°F — rendered the PHEV's core feature (Level 2 charging) unusable in cold climates for months before parts became available. Under Song-Beverly, both the fire risk and the prolonged charging restriction constitute a substantial impairment of use and value; dealers who failed to promptly replace the converter give affected owners additional grounds for a buyback claim.
Owners are advised not to charge their vehicles when the ambient air temperature is below or expected to drop below 41 degrees Fahrenheit (5 degrees Celsius). Dealers will replace the DC-DC converter, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Toyota
MIL / check engine light illuminated; Level 2 (J1772) charging inoperative or stopped mid-charge; no charge accepted from EVSE despite confirmed Level 2 power supply; DTC P0D2A19 or P1C1B00 stored; hybrid system operates on engine only; EV mode unavailable or range severely reduced
A failed onboard charger eliminates the primary reason many owners paid a premium for the plug-in hybrid — the ability to run on electricity. If the charger malfunction is not fully resolved after one or more warranty repair attempts, each failed visit counts toward California's reasonable-number-of-attempts threshold under Song-Beverly. California's PZEV emission warranty (15 years/150,000 miles) independently extends the window in which a repair failure can trigger a lemon-law claim, well beyond the standard Powertrain Warranty period.
Replace electric vehicle charger sub-assembly (part G9099-78040) under Lexus Powertrain Warranty (72 mo/70,000 mi). California PZEV emission warranty coverage: 15 years/150,000 miles from in-service date.
Touchscreen unresponsive or frozen mid-operation; navigation blacks out or routes incorrectly; Intelligent Voice Assistant fails to respond; Bluetooth phone/audio drops repeatedly; wireless Apple CarPlay or Android Auto disconnects; infotainment reboots unexpectedly; audio cuts out; user profiles reset; OTA update notification does not appear
Lexus has acknowledged at least four successive rounds of software fixes across MY2022-2024 NX 450h+ vehicles, indicating a systemic and persistent defect in the infotainment system. Under Song-Beverly, repeated dealer visits for the same uncorrected software malfunction — even if the dealer characterizes each as a separate bug — can collectively satisfy the reasonable-number-of-attempts standard when the root defect (head unit software architecture) is never durably resolved.
Head unit software update via OTA (owner-initiated from Settings menu) or dealer-performed update via TIS. Not covered as a warranty repair per bulletin (N/A to Warranty). Owners should request documentation of the software version installed before and after each service visit.
Pre-collision warning and autonomous emergency braking temporarily deactivated; radar adaptive cruise control drops out unexpectedly; lane departure warning / LDA alert goes silent; instrument cluster warning message indicating safety system unavailable; all LSS+ functions resume after approximately 4-second reboot; phantom / nuisance pre-collision alerts before or after reboot event
A 4-second total deactivation of all autonomous emergency braking and lane-keeping functions — without adequate warning — meets the standard for a safety-related defect under California's Song-Beverly Act. If a dealer completes the software update but the owner experiences subsequent LSS+ anomalies (phantom braking, false alerts, or further blackouts), each additional visit adds to the repair-attempt count and may independently support a lemon-law claim. The Special Service Campaign designation confirms Toyota/Lexus had actual notice of the defect.
Forward recognition camera software update performed by Lexus dealer at no charge (Special Service Campaign 23LC01). Owners should verify VIN eligibility via TIS or Lexus recall lookup. If dealer cannot immediately complete the campaign, request written documentation of the open campaign on the repair order.
Vehicle fails to start after short-distance or overnight parking; 12V battery completely depleted requiring jumpstart; all doors and liftgate inoperative (electric locks non-functional); instrument cluster goes dark while driving; sudden loss of power steering and brake assist at speed; warning light cluster illuminates without prior notice; DTC P162B87 (Lost Communication with Battery Monitor Module) stored; multiple AAA jumpstarts within weeks; battery replaced under warranty but issue recurs
Multiple NHTSA complaints document complete 12V electrical failures occurring within the first year of ownership, with repeated battery replacements failing to resolve the root cause. A vehicle that requires multiple jumpstarts or battery replacements within warranty — or that loses all electrical power including power steering and brake assist while driving — presents both a safety defect and a substantial impairment of use and value under California's Song-Beverly Act. Each dealership visit for this condition is a separate repair attempt; three or more visits for the same underlying electrical defect are a strong indicator of lemon-law eligibility.
Replace the battery state sensor assembly per TSB L-SB-0035-24 (op EL2425; 0.4 flat-rate hours). Covered under Lexus Basic Warranty (48 mo/50,000 mi). Dealers may also replace the 12V battery under warranty if confirmed defective. For owners primarily driving short EV-mode trips, Lexus may recommend periodic ICE engine operation to allow conventional 12V recharging via the HV battery converter.
Vehicle brakes suddenly or harshly without driver input; brake warning light illuminates red at low speed; brake hold feature activates and locks brakes while vehicle is moving at 25-35 mph; sudden stop while reversing at 3 mph without brake pedal engagement; dealer unable to replicate condition; VSC and traction control warning lights illuminated; steering pulls left combined with unexpected brake application; repeated occurrences across multiple incidents
Unintended autonomous braking at highway speed or while maneuvering in reverse constitutes a safety defect under California's Song-Beverly Act. When the dealer documents 'cannot replicate' on the repair order, that visit still counts as a repair attempt. Owners experiencing phantom braking should insist that the symptom, all warning lights observed, vehicle speed, and direction of travel be written on every repair order — even if the dealer cannot reproduce the condition. California law does not require a successful repair to count a visit.
Ensure LSS+ Special Service Campaign 23LC01 software update is complete. Dealer diagnosis using Techstream data recorder to capture event data during recurrence. If brake hold feature implicated, Lexus may offer brake actuator ECU software update. Owners should video-record incidents and demand all event data (EDR / Techstream logs) be preserved and noted on repair orders.
remedy available
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2022 RAV4 Prime and 2022 Lexus NX450h+ plug-in hybrid electric (PHEV) vehicles. The electric current rectifying module contained within the DC-DC converter may have been damaged during production, which can result in an electrical short-circuit.
remedy available
Toyota Motor Engineering & Manufacturing (Lexus) is recalling certain 2022 NX250, NX350, NX350h, and NX450h+ vehicles. Missing spot-welds between the body panels and the front shock absorber mounting areas may cause the front shock absorber to separate from the mounting area.
remedy available
Toyota Engineering & Manufacturing (Toyota) is recalling certain 2022 Lexus LX 600, Lexus NX 350h, Lexus NX 450h+, Toytoa RAV4 Hybrid, 2021-2022 Lexus LS 500h, Toyota Mirai, RAV4 PRIME, Sienna, Venza, and 2020-2022 Toyota Highlander Hybrid vehicles. The Skid Control ECU software may not turn on the Vehicle Stability Control (VSC) system when the vehicle is restarted after the driver has disabled the VSC system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 126, "Electronic Stability Control Systems."
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 is one of the strongest lemon laws in the nation, and the NX 450h+'s defect record is directly relevant to many owners.
WHAT QUALIFIES: A vehicle sold or leased in California is a lemon if a manufacturer warranty defect substantially impairs use, value, or safety, and the manufacturer has been given a reasonable number of repair attempts. That presumption arises after two attempts for a defect that could cause death or serious injury — or four attempts for other defects — or 30 cumulative days out of service.
HOW THIS APPLIES TO YOUR NX 450h+: The DC-DC converter fire recall (23V478000) and the total electrical power loss documented in NHTSA ODI #11684075 — loss of power steering and brake assist at highway speed — are safety defects requiring only two repair attempts to raise the lemon presumption. The LSS+ blackout (23LC01) similarly disables autonomous emergency braking. Repeated 12V battery failures or an inoperative Level 2 charger may qualify under the four-attempt standard or the 30-day out-of-service standard.
YOUR REMEDIES: Song-Beverly entitles qualifying owners to a full replacement vehicle or buyback at the contract price, plus damages. The manufacturer pays attorney fees if you prevail — no out-of-pocket cost to you. This is general information, not legal advice. Law as of Jun 30, 2026.
“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 NX 450h+'s most frustrating defects — phantom braking, 12V power loss, LSS+ blackouts — are exactly what dealers cannot reproduce. Here is how to build a durable paper trail:
1. DEMAND WRITTEN SYMPTOM DOCUMENTATION EVERY VISIT. Insist the service advisor write exactly what you reported: 'Customer states brake hold activated and locked brakes at approximately 30 mph; vehicle stopped without driver input; brake warning light red.' Never accept 'checked, OK.' Request every repair order before you leave.
2. VIDEO EVERY INCIDENT. Dashboard camera footage showing warning lights, speed, and conditions is admissible evidence. Record your verbal description immediately after each anomaly.
3. REQUEST TECHSTREAM DATA. Every NX 450h+ stores DTC freeze frames. Ask the service manager to scan for P162B87 (battery monitor), P0D2A19/P1C1B00 (charger fault) even if lights are off. Request a printed DTC history log before any codes are cleared.
4. CONFIRM ALL OPEN CAMPAIGNS AT EVERY VISIT. Before each appointment, verify that Special Service Campaign 23LC01 (LSS+ camera software) and TSBs L-SB-0022-23 and L-SB-0006-23 are applied to your VIN. Unaddressed campaigns are relevant to any lemon-law claim.
5. LOG OUT-OF-SERVICE DAYS. Each day at the dealership, tow yard, or rental counts toward California's 30-day threshold. Save tow receipts, loaner agreements, and drop-off/pickup dates.
6. ESCALATE AFTER THE SECOND FAILED REPAIR. Open a case with Lexus Brand Engagement Center. The internal case number becomes part of the manufacturer's record.
The Lexus NX 450h+ carries a defect record that punches above its weight for a luxury nameplate. Three formal recalls in the first model year — including a fire-risk DC-DC converter defect — plus four OEM TSBs acknowledging charger failures, ADAS blackouts, and multi-generation infotainment bugs tell a story of a platform that reached market without adequate validation.
Most troubling is the 12V battery drain: a PHEV without an alternator that repeatedly strands owners — and in documented cases loses power steering and brake assist at highway speed — is not delivering on the Lexus promise. TSB L-SB-0035-24 addressing the battery monitor module suggests systemic issues a sensor swap may not fully resolve. Document everything.
— The Margarian Law team
If your Lexus NX 450h+ has been to the dealer multiple times for charging failure, 12V battery drain, sudden power loss, LSS+ system errors, or infotainment problems that keep returning, you may have options under California's lemon law. Margarian Law has handled thousands of lemon-law cases and offers a free case review — with no out-of-pocket fees if you qualify.
The NX 450h+ does not have a traditional alternator. Its 12-volt auxiliary battery is recharged exclusively through the hybrid system's DC-DC converter, which can remain inactive when the vehicle operates mostly in EV mode on short trips. If the converter is defective — or if the battery state sensor assembly fails (DTC P162B87, addressed by TSB L-SB-0035-24) — the 12V battery will drain repeatedly even with normal driving patterns. NHTSA complaint records document owners experiencing three complete battery failures within five days at under 6,000 miles. If you have had more than one 12V battery failure under warranty, document every AAA call and every dealer visit. Multiple warranty repair attempts for the same underlying electrical defect can qualify your vehicle for a lemon-law claim under California's Song-Beverly Act.
If your 2022 NX 450h+ shows a check engine light and will not accept Level 2 charging, the likely cause is a defective 6.6 kW onboard charger sub-assembly. Lexus issued TSB L-SB-0022-23 (March 2023) specifically for this defect on early Kyushu-plant 2022 production. The fault codes to watch for are P0D2A19 (charger input current sensor above threshold) and P1C1B00 (PFC boosting circuit malfunction). The fix is replacement of the charger sub-assembly under the Lexus Powertrain Warranty (72 months/70,000 miles). California PZEV emission warranty extends this coverage to 15 years or 150,000 miles from your in-service date. If your dealer replaces the charger and it fails again, that second failure is a strong indicator of lemon-law eligibility under Song-Beverly.
This is likely the LSS+ intermittent blackout defect covered by Special Service Campaign 23LC01. Approximately 3,970 NX 450h+ vehicles built November 2021 – December 2022 have a forward recognition camera software error causing all LSS+ functions — pre-collision braking, adaptive cruise, and lane departure warning — to go completely inoperative for ~4 seconds before rebooting. Your autonomous emergency braking shuts off without warning. The fix is a free camera software update at your Lexus dealer. If you continue to experience phantom braking or false alerts after the update, each visit counts as a repair attempt. Two failed attempts for a braking safety defect triggers the Song-Beverly lemon-law presumption. Contact Lexus at 1-800-255-3987 to verify your VIN's campaign eligibility.
NHTSA recall 23V478000 covers 2022 Lexus NX 450h+ and 2021-2022 RAV4 Prime vehicles with a DC-DC converter production defect creating a short-circuit and fire risk. The interim remedy — do not charge below 41°F — effectively disabled plug-in charging in cold weather for months. The final remedy is DC-DC converter replacement at the dealer, free of charge. Owner letters were mailed December 29, 2023; reference Lexus recall 23LB01. If your dealer has not completed this, call 1-800-331-4331. If the recall was completed but charging problems persist, or if you experienced fire damage or prolonged loss of charging ability, document everything — denial of the vehicle's primary PHEV feature constitutes substantial impairment of use and value under California's Song-Beverly Act.
These issues are addressed by TSB L-SB-0006-23 Rev1, covering multiple rounds of head-unit software updates to the Panasonic Lexus Multimedia system on 2022-2024 NX 450h+ vehicles. Lexus issued update tiers for software versions 1020, 1040, and 2050 to address Cloud Navigation errors, voice assistant failures, Bluetooth stack bugs, and display freezes. Owners can accept the update via an on-screen OTA prompt or have the dealer apply it via TIS. If your infotainment has been serviced two or more times for the same recurring defects without resolution, each visit counts as a repair attempt under Song-Beverly. Four failed repair attempts — even for a non-safety defect like infotainment — triggers the lemon-law presumption in California.
Unexpected braking without driver input has been reported to NHTSA by multiple 2022 NX 450h+ owners — including a vehicle stopping abruptly in reverse at 3 mph with the brake warning light red, and the brake hold feature locking the brakes while moving at 25-35 mph. These are consistent with a Brake Hold / Intelligent Clearance Sonar interaction defect, and may also overlap with the LSS+ camera software issue addressed by Campaign 23LC01. If your dealer cannot replicate the problem, that response still counts as a repair attempt under California law. Insist the symptom — speed, direction, brake light status, any warning messages — be written on the repair order verbatim, and video-record future incidents. Two failed repair attempts for a crash-risk braking defect triggers the Song-Beverly safety-defect presumption.
Skip to content