NHTSA ID Number: 11713779

Incident Date: 2026-01-17

Manufacturer's Name: Toyota Motor Corporation

Vehicle/Equipment Make: LEXUS

Vehicle/Equipment Model: IS

Model Year: 2020
9999 If Unknown Or N/A

Vehicle Identification Number: JTHAA1D21L5

Vehicle Mileage At Failure:

Vehicle Speed:

Number Of Occurrences:

Was Vehicle Towed: No

Consumer Location: Upper Marlboro, MD

Summary of Complaint

This vehicle has a recurring, safety-critical defect involving intermittent engine misfires, flashing MILs, reduced engine power, sudden loss of acceleration, and noticeable engine shaking. Despite multiple repair attempts and extended diagnostics by a dealership, with manufacturer technical assistance, the defect continues. The defect has repeatedly caused the vehicle to stall and lose propulsion while driving, creating a serious hazard. Documented events include: •FIRST INCIDENT: The MIL flashed and engine power 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.

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Complaint 11713779 Documents

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CRASH: No
WAS VEHICLE INVOLVED IN A CRASH

FIRE: No
WAS VEHICLE INVOLVED IN A FIRE

INJURIES: 0
NUMBER OF PERSONS INJURED

DEATHS: 0
NUMBER OF FATALITIES

Was Medical Attention Required: No

Was Incident Reported To Police: No

Date Of Incident: 2026-01-17
(YYYY-MM-DD)

Date Added To File: 2026-01-27
(YYYY-MM-DD)

Date Complaint Received By NHTSA: 2026-01-27
(YYYY-MM-DD)

Date Purchased:
(YYYY-MM-DD)

Was Original Owner: No

Product Type: Vehicle

V = Vehicle
T = Tires
E = Equipment
C = Child Restraint

Specific Component's Description: ENGINE

Anti-Lock Brakes: No

Cruise Control: No

Number Of Cylinders:

Drive Train Type:
[AWD, 4WD, FWD, RWD]

Fuel System:

FI = Fuel Injection
TB = Turbo

Fuel Type:

BF = BiFuel
CN = CNG/LPG
DS = Diesel
GS = Gas
HR = Hybrid Electric

Vehicle Transmission Type [Auto, Man]:

(DOT) Department Of Transportation Tire Identifier:

Tire Size:

Location Of Tire:

FSW = Driver Side Front
DSR = Driver Side Rear
FTR = Passenger Side Front
PSR = Passenger Side Rear
SPR = Spare

Type Of Tire Failure:

BST = Blister
BLW = Blowout
TTL = Crack
OFR = Out Of Round
TSW = Puncture
TTR = Road Hazard
TSP = Tread Separation

Was Defective Tire Repaired:

Was Part Original Equipment:

Date Of Manufacture:
(YYYYMMDD)

Type Of Child Seat:

B = Booster
C = Convertible
I = Infant
IN = Integrated
TD = Toddler

Installation System:

A = Vehicle Safety Belt
B = Latch System

Dealer's Name:

Dealer's Telephone Number:

Dealer's City:

Dealer's State:

Dealer's Zipcode:

SOURCE OF COMPLAINT CODE:

CAG = Consumer Action Group
CON = Forwarded From A Congressional Office
DP = Defect Petition,result Of A Defect Petition
EVOQ = Hotline VOQ
EWR = EARLY WARNING REPORTING
INS = Insurance Company
IVOQ = NHTSA Web Site
LETR = Consumer Letter
MAVQ = NHTSA Mobile APP
MIVQ = NHTSA Mobile APP
MVOQ = Optical Marked VOQ
RC = Recall Complaint, Result Of A Recall Investigation
RP = Recall Petition, Result Of A Recall Petition
SVOQ = Portable Safety Complaint Form (PDF)
VOQ = NHTSA Vehicle Owners Questionnaire

Incident State Code:

Vehicle Operator's Name: