Most common 2018 Acura RLX problems
Share of the 6 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Acura RLX complaints by model year
Best RLX years: 2016, 2019, 2015. Years to avoid: 2014. Compare all years →
2018 Acura RLX recalls (1)
Fuel system, gasoline › Delivery › Fuel pump
Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda…
Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are KGC and KGD.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2018 Acura RLX:
Electrical overstress
The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect. During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events.
What 2018 Acura RLX owners say
Engine & cooling
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. The contact stated that the VIN was not included in NHTSA Campaign Number: 23V751000 (ENGINE AND ENGINE COOLING). The manufacturer was notified of the failure and stated that the issue would be escalated to a higher department. The failure mileage was 92,000.
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.
2018 Acura RLX engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl hybrid | 7-speed dual-clutch | AWD | 28 / 29 / 28 |
| 3.5L 6-cyl | 10-speed automatic | FWD | 20 / 29 / 23 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2018 Acura RLX a good car?
Based on 6 owner complaints filed with NHTSA, the 2018 RLX rates average: 20% fewer complaints than a typical year of the RLX at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2018 Acura RLX?
The engine & cooling — 4 complaints, 67% of all complaints for this model year, most often about engine › crank/camshaft position sensor. Next are the electrical system (2) and fuel & propulsion system (1).
How many recalls does the 2018 Acura RLX have?
There is 1 recall for the 2018 Acura RLX, the most recent from December 18, 2023 (fuel pump). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Acura RLX?
The best years by complaints, compared at the same age, are 2016, 2019 and 2015. Years to avoid or approach with caution: 2014. See the full Acura RLX years comparison.
At what mileage do 2018 Acura RLX problems happen?
The median mileage reported in complaints is about 92,000 miles; 0% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.