2021 Toyota Avalon Engine Problems
- Complaints
- 4about this part
- Share
- 19%of 21 total for the year
- Median mileage
- 2,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine of the 2021 Toyota Avalon, 19% of the 21 complaints for this model year. Where a mileage was given, the median is 2,500 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While driving our 2021 Avalon on a busy interstate,the engine failed on us unexpectantly. This cathostrophic failure without warning startled my finance and ruined xmas holidays. The car was towed to a local Toyota dealership who diagnosed the issue as low oil pressure which prevented oil reaching the top engine ultimately collapsing the rocker arm. Oddly enough the technician shared it was not low on oil nor were there any signs of le. We were informed the engine must be replaced. We purchased the vehicle with 56K and just hit 69K. …”
NHTSA complaint #11635159, filed 2025-01“The contact owns a 2021 Toyota Avalon. The contact stated that while driving at approximately 35 MPH, the vehicle failed to properly accelerate and stalled. The contact restarted the vehicle, and the vehicle drove as designed. There were no warning lights illuminated. The vehicle was taken to the local dealer but was not diagnosed or repaired. The manufacturer was contacted, and a claim was submitted. The approximate failure mileage was 15,000.”
NHTSA complaint #11505882, filed 2023-02, 15,000 miles“The contact owns a 2021 Toyota Avalon. The contact stated while diving approximately 50 MPH, the engine and transmission warning lights illuminated. The contact also stated that the windshield had detached from the frame. The contact stated that the rear doors were failing to close correctly. The contact stated the vehicle would roll with the brake pedal depressed before coming to a stop. While driving approximately 75 MPH, the steering wheel fractured and the air bags inadvertently deployed. Additionally, the headlamps and turn signals also failed to operate as needed. …”
NHTSA complaint #11479951, filed 2022-08, 2,500 miles“The contact owns a 2021 Toyota Avalon HV. The contact stated that while driving, all the instrument control panel lights were illuminated. The vehicle was taken to the local dealer eight or nine times where it was diagnosed there was moisture in the brakes, the brake assembly, sensor harness, sensor in the grill, gear shifter, and hybrid sensor needed to be replaced. The vehicle was repaired. However, failure recurred. The contact stated that while driving the instrument panel, warning lights illuminated, and the hybrid system overheated. The pull over somewhere safe message was displayed. …”
NHTSA complaint #11456819, filed 2022-03, 800 milesRelated service bulletins
- 11037186Aug 11, 2026Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’…
- 11029896Feb 27, 2026OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- 11022949Aug 7, 2025The specific condition covered by this program is for a small engine coolant leak that can occur from the flow shut-off valve that can allow coolant to drip on other parts of the…
- 11020668Jun 19, 2025Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is…
- 11019330Apr 2, 2025Some 2021 model year Avalon, 2020 – 2022 model year Camry, and 2019 – 2022 model year RAV4 vehicles equipped with an A25A-FKS engine may exhibit reduced engine power and/or a MIL…
- 11018327Apr 2, 2025Some 2021 model year Avalon, 2020 – 2022 model year Camry, and 2019 – 2022 model year RAV4 vehicles equipped with an A25A-FKS engine may exhibit reduced engine power and/or a MIL…
- 11016794Feb 20, 2025Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’…
- 11015508Feb 20, 2025Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’…
- 11014174Jan 5, 2025Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is…
- 11012750Dec 9, 2024CUSTOMER SUPPORT PROGRAM 24TE04 Multiple Model & Model Year Toyota Vehicles Coverage for Flow Shut-off Valve Coolant Leak Frequently Asked Questions
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 13% |
| 2021 | 4 | 19% |
| 2019 | 7 | 10% |
| 2017 | 6 | 43% |
| 2016 | 4 | 17% |
| 2015 | 2 | 5% |
| 2014 | 2 | 2% |
| 2013 | 4 | 3% |
| 2012 | 1 | 3% |
| 2011 | 3 | 3% |
| 2010 | 1 | 2% |
| 2009 | 2 | 2% |
| 2008 | 2 | 1% |
| 2007 | 19 | 8% |
| 2006 | 12 | 3% |
| 2005 | 7 | 3% |
| 2004 | 3 | 1% |
| 2003 | 7 | 2% |
| 2002 | 1 | 1% |
| 2001 | 1 | 1% |
| 2000 | 4 | 2% |
| 1999 | 1 | 1% |
| 1996 | 2 | 2% |
Other parts of the 2021 Toyota Avalon
12 complaintsVehicle speed control
3 complaintsBrakes
2 complaintsForward collision avoidance
2 complaintsBack-over prevention (rear camera)
1 complaintsElectrical system
1 complaintsSeat belts
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2021 Toyota Avalon
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology