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Acura RLXModel year report

2018 Acura RLX Problems

Complaints
6filed with NHTSA
Median mileage
92,000miles, 3 complaints with mileage
Recalls
1campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
5 / 5stars overall
EPA fuel economy
23 mpgcombined, 3.5L 6-cyl FWD · 20 city / 29 hwy

Sources: NHTSA records for the 2018 Acura RLX (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 6 consumer complaints for the 2018 Acura RLX. The part named most often is electrical system, with 2 complaints (33% of the total), followed by engine (2) and engine cooling (2). 3 of the complaints include a mileage, and 0% of those were filed for vehicles with under 50,000 miles; the median is 92,000 miles. NHTSA lists 1 recall campaign and 21 technical service bulletins for this model year. Electrical system complaints overlap with 4 technical service bulletins filed under the same part. Engine complaints overlap with 1 technical service bulletin filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Electrical system: “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

Engine: “My vehicle has the same 3.5 liter naturally aspirated V6 that comes in the Acrua MDX which is currently on recall for connecting rod bearings on vehicles with 3.5-liter V6 engines can fail, leading to complete engine failure. my car has the excact same engin with the exact same problem. i have the full diagnosis and estimate from Acura ENGINE REPLACEMENT”

NHTSA complaint #11624761, filed 2024-11

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. …”

NHTSA complaint #11642306, filed 2025-02, 92,000 miles

Fuel system: “The contact owns a 2018 Acura RLX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.”

NHTSA complaint #11628568, filed 2024-12

Mileage when problems were reported

0% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 51,000 and 110,785 miles.

0%0–100%10–250%25–5033%50–7533%75–10033%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (3 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 92,000 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

2024202520263
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2018 Acura RLX. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
RLX · sedan FWD★★★★★5 / 5555 · 9.7% risk
RLX Sport Hybrid · sedan AWDnot rated—555 · 9.7% risk

Driver aids listed by NHTSA for the 2018 model year: forward collision warning standard, lane departure warning standard, automatic emergency braking not available.

Neighbouring years: 2017: same overall rating; 2019: same overall rating. A redesign between years can change both the car and the test.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2018 Acura RLX version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
RLX FWD3.5L 6-cyl10-speed automatic202923$3,550

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2018 Acura RLX → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 21 on record; the latest 10 are shown.

See all 21 bulletins →

Other model years of the Acura RLX

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2018692,0001523—Not enough data
2016619,7000523—Not enough data
201511121,0003523—Not enough data
20148460,0005—23Not compared (fewer than 3 comparable model years)Stable

All Acura RLX model years

Frequently asked questions

How many NHTSA complaints does the 2018 Acura RLX have?

NHTSA recorded 6 consumer complaints for the 2018 Acura RLX as of Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2018 Acura RLX is reported most often?

Electrical system is named most often, in 2 complaints (33% of the total), followed by engine with 2.

Has the 2018 Acura RLX been recalled?

NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

How did the 2018 Acura RLX do in NHTSA crash tests?

NHTSA's 5-Star Safety Ratings give the 2018 Acura RLX 5 out of 5 stars overall. Ratings from different model years are only comparable when the vehicle was not redesigned in between.

What gas mileage does the 2018 Acura RLX get?

The EPA rates the 2018 Acura RLX (RLX, 3.5L 6-cyl) at 23 mpg combined, 20 city and 29 highway, with an estimated annual fuel cost of $3,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2018 Acura RLX reported?

Among the 3 complaints that include a mileage, the median is 92,000 miles and the middle half falls between 51,000 and 110,785 miles; 0% were filed for vehicles with under 50,000 miles.

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. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.