Lexus IS Engine problems by year

Lexus dealership - following 34-day retention with Lexus Technical Assistance (TAC Case [redacted]) and personal on-site inspection by a Lexus Field Technical Engineer - confirmed worn intake valve guide on Cylinder 3. Repair estimate: $10,355.61 subtotal per Service Bulletin L-SB-0007-21 ($10,671.72 total incl. shop supplies and tax). Estimate cites L-SB-0007-21 without mileage qualification, confirming technical applicability. TSB PATTERN - NO RECALL: Lexus has issued multiple TSBs on the 8AR-FTS engine: L-SB-0153-17 (September 2017) and L-SB-0007-21 (March 2021, revised April 17 and July 2, 2024), covering 2015-2024 model year vehicles - progressively widening applicability over three years. Both 2024 revisions occurred during the active warranty period. No recall has been issued and this consumer received no notification of any kind. A TSB is an internal dealer communication - not consumer notification. A CPO purchaser relying on Lexus's representations of comprehensive inspection and rigorous certification has a reasonable right to assume known defects were addressed, without searching technical databases. MANUFACTURER RESPONSE: Lexus declined to authorize repair under warranty or as goodwill and declined to confirm authorization in writing. REQUEST: Please investigate whether the pattern of multiple TSBs covering progressively wider applicability - with no recall despite safety-critical symptoms - warrants a formal investigation and escalation to a safety recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

it is stuck in the wrong gear, accompanied by a significant loss of engine power. An onboard diagnostic alert has indicated a malfunction in the electronic control of the engine throttle or automatic transmission. This 'limp mode' behavior creates a hazardous situation during highway driving or merging, as the vehicle cannot maintain speed or respond to throttle inputs, increasing the risk of a rear-end collision.

was reduced while driving. The vehicle was taken to the dealership for evaluation and repair. A diagnostic code confirmed a cylinder misfire. •SECOND INCIDENT: Several days after being returned to the owner, the MIL flashed again and engine power was reduced, requiring careful maneuvering. The vehicle was returned to the dealership for further repair and remained in their custody for about a month. •THIRD AND MOST SEVERE INCIDENT: A few days after being returned, the MIL flashed again. The vehicle abruptly slowed, shook, and temporarily stalled in active traffic, requiring immediate intervention to avoid a collision. The engine restarted after pulling over safely. The vehicle has undergone compression testing, coil and spark plug replacement, battery replacement, and extended diagnostics with manufacturer technical support. Despite these efforts, the defect persists, demonstrating it is intermittent and unpredictable. The combination of sudden loss of engine power, stalling, and shaking in traffic creates a foreseeable risk of collision, particularly at intersections and in situations where predictable vehicle response is critical. Videos and diagnostic evidence document these recurring failures.

engine stalling and loss of power - I believe my vehicle should be considered part of the affected group. It is not safe or fair that some 2017 models are excluded based solely on VIN range when the defect clearly exists in other units as well. My vehicle is showing the same failure and should be eligible for the same repair or recall coverage. If you'd like, I can also format this as an email, a letter to Lexus corporate, or a service request message.

know what to think when she told me. Until I experienced it myself I didn't really understand how dangerous this problem is. She experience this sudden unintended acceleration when the car was in park after she got in the car and started it. I've read of this sudden unintended acceleration but never experienced it until this weekend. It was exactly this.. an unintended, unexpected, uncontrolled acceleration of a vehicle, accompanied by an apparent loss of braking effectiveness. This was not driver error. It is some kind of mechanical, software problem, electrical problem, or some combination of these factors. There was no driver error. This is not an issue with the floor mats. I drove the car home into the garage. I took it to the dealership the first available appointment on Monday. I had another incident on Wednesday, August 30, 2023. I was at the gym. My wife went to move my car as my parking time limit in La Jolla had expired. She experience sudden unintended acceleration when the car was in park after she got in the car and started it. The car had high engine revs and the car lurched forward while in park. The Lexus Dealership kept the car for a week. Mileage 67,249 Vehicle Report - [[redacted]]. Reviewed and analyzed by Lexus Factory. No recommended repairs are needed or required at this time. I opened TAS Case# [[redacted]] . I contacted Lexus Product Liability Team Case # [[redacted]] but, no one from corporate will look at the car. What should do? [[redacted]] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)