2021 Honda Ridgeline Engine cooling Problems
- Complaints
- 3about this part
- Share
- 3%of 102 total for the year
- Median mileage
- 52,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2021 Honda Ridgeline, 3% of the 102 complaints for this model year. Where a mileage was given, the median is 52,000 miles.
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.
“The contact owns a 2021 Honda Ridgeline. The contact stated that while driving approximately 30 MPH, there was a knocking sound coming from the engine compartment while accelerating and there was a loud popping sound coming from the engine compartment shortly afterwards. The low oil level warning light was illuminated. The vehicle was towed to Firestone and was diagnosed with engine failure. The vehicle had not been repaired by Firestone but was instead towed to the dealer. …”
NHTSA complaint #11638882, filed 2025-01, 52,000 miles“The contact owns a 2021 Honda Ridgeline. The contact stated that while at a stoplight, the Auto START/STOP feature malfunctioned, and after releasing the brake pedal, the engine failed to automatically restart as designed. After shifting back to park(P), the vehicle restarted and operated as normal. The cause of the failure was not yet been determined. The local dealer was notified of the failure. The manufacturer was not yet contacted. The contact was informed of the NHTSA Action Number: EA25004 (ENGINE AND ENGINE COOLING). …”
NHTSA complaint #11659895, filed 2025-05, 50,000 miles“The contact's husband owns a 2021 Honda Ridgeline. The contact stated that while her husband was driving 55 MPH, the vehicle went into LIMP Mode and made an abnormal knocking sound. The check engine warning light was illuminated. The driver was able to pull over to the side of the road. The vehicle was towed to the dealer, where the timing belt, the water pump, and the tensioner pulley were replaced; however, the knocking sound persisted. The dealer determined that the lower bearing had failed, and the dealer recommended replacing the engine with a used engine. …”
NHTSA complaint #11703807, filed 2025-12, 102,000 milesRelated service bulletins
- 10247623Dec 15, 2023Service Bulletin - Due to variations in the purge control solenoid valve spring, the valve wears unevenly and intermittently sticks. This may result in setting DTC P0441…
- 10245550Nov 10, 2023Service Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can…
- 10234629Apr 12, 2023Service Bulletin - The engine will not crank on initial startup after precipitation and sub-freezing temperatures. Water can enter the starter motor, and when temperatures drop…
- 10233667Mar 28, 2023Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 Accords, CR-Vs, Odysseys, Passports, Pilots, Ridgelines, 2020 Fits, 2020-2021 Civic…
- 10233206Mar 13, 2023Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 Accords, CR-Vs, Odysseys, Passports, Pilots, Ridgelines, 2020 Fits, 2020-2021 Civic…
- 10232977Mar 10, 2023Product Update - Honda is conducting a product update to your 2019-22 Passport, 2016-22 Pilot, and 2020-23 Ridgeline. Under certain circumstances, after coming to a stop and the…
- 10232975Mar 10, 2023Warranty Extension - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart.
- 10232973Mar 10, 2023Warranty Extension - Warranty Extension reimbursement form for engine idle stop repairs made before the warranty extension notice date.
- 10232960Mar 1, 2023Service Bulletin - The engine will not crank on initial startup after precipitation and sub-freezing temperatures. Water can enter the starter motor, and when temperatures drop…
- 10231048Jan 25, 2023Service Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 9% |
| 2024 | 1 | 1% |
| 2023 | 2 | 2% |
| 2021 | 3 | 3% |
| 2019 | 6 | 3% |
| 2018 | 2 | 1% |
| 2017 | 11 | 3% |
| 2011 | 1 | 3% |
| 2008 | 5 | 4% |
| 2007 | 2 | 1% |
| 2006 | 14 | 6% |
Other parts of the 2021 Honda Ridgeline
29 complaintsElectrical system
15 complaintsForward collision avoidance
15 complaintsExterior lighting
14 complaintsOther or unknown
14 complaintsTransmission and drivetrain
11 complaintsFuel system
6 complaintsBody and structure
5 complaintsBack-over prevention (rear camera)
4 complaintsLane departure
4 complaintsVehicle speed control
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaints
← All problems reported for the 2021 Honda Ridgeline
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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