2018 Acura RLX Engine cooling Problems
- Complaints
- 2about this part
- Share
- 33%of 6 total for the year
- Median mileage
- 71,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 2018 Acura RLX, 33% of the 6 complaints for this model year. Where a mileage was given, the median is 71,500 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 2018 Acura RLX. The contact stated while driving her vehicle at an undisclosed speed, stated that the vehicle would not start up, and noticed every single waring light illuminated up on her dash. The vehicle was taken to a dealer twice, first time it was diagnosed to have a crank sensor failure, it was replaced. Two days after, the issues reoccurred, where it was diagnosed to be the engine starter. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 51,000.”
NHTSA complaint #11738529, filed 2026-05, 51,000 miles“The contact owns a 2018 Acura RLX. The contact stated while driving 30 MPH, the oil change and tire rotation messages were displayed. The contact stated that a dealer was contacted. The contact stated that an oil change and tire rotation were performed, and the contact was informed that the engine was knocking. The contact received a call notification from the dealer two days after the vehicle was repaired regarding the connecting rod bearing. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. …”
NHTSA complaint #11642306, filed 2025-02, 92,000 milesRelated service bulletins
- 10213569May 10, 2022American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RLXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X…
- 10180017Sep 18, 2020Service Bulletin - The timing belt area chirps after the engine warms up.
- 10178469Aug 6, 2020Service Bulletin - The timing belt area makes a chirping noise after the engine warms up.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2018 | 2 | 33% |
Other parts of the 2018 Acura RLX
← All problems reported for the 2018 Acura RLX
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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