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Forward collision avoidancePart report

2021 Acura TLX Forward collision avoidance Problems

Complaints
8about this part
Share
11%of 72 total for the year
Median mileage
11miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 8 complaints about the forward collision avoidance of the 2021 Acura TLX, 11% of the 72 complaints for this model year. Where a mileage was given, the median is 11 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.

“On a slightly snowing evening driving on the highway, a warning was displayed indicating Some Driver Assist Systems Cannot Operate, Radar Obstructed and the green icon turned orange. Traveling about 45 mph, I slowed down to get over and the car drastically slowed down without me pressing the brake. After about 10 more minutes of driving the icon turned green again. This has happened on more than one occasion creating a serious safety risk, typically during inclement weather.”

NHTSA complaint #11640171, filed 2025-02

“I was traveling on the highway (on a very rainy day), when my car's green signal lights and orange engine light began blinking. Immediately, an orange warning sign on the dash read, Some Driver Assist Systems Cannot Operate, Radar Obstructed . A few seconds after that occurred, I accelerated to pass a vehicle & as soon as I switched lanes to get over, my car went from speeds of about 85 MPH, abruptly down to 15-20 MPH. My safety was immediately put at risk as the driver I passed began tailgating me as if my actions were intentional. …”

NHTSA complaint #11541773, filed 2023-08

“My wife and I were on the first day of vacation, driving from Virginia to FL by way of SC. Around 1pm I was driving the car on interstate 20 West in South Carolina near Bishopville. There were no cars in my lane in front of me and the car suddenly activated what Acura refers to as the CMBS system. The purpose of this is to stop us if it thinks we are going to run into another vehicle. I'm not 100% sure but I think this is related to the adaptive cruise control. We had not used cruise control that day because traffic on rt 95 South was extremely heavy. …”

NHTSA complaint #11500621, filed 2023-01

“On two occasions the Collision Mitigation Braking System (CMBS) has improperly activated with HARD braking leaving me fighting for control. On one occasion, I was driving at 35 MPH on a divided boulevard in my home subdivision with no vehicles in sight. The second occasion occurred on the Florida Turnpike at 75 MPH while in the outside lane. There was no vehicle in front of me or to the side at that time. That was a scary moment. I want to emphasize that the CMBS employed HARD braking along with the flashing dash warning. After each instance I took the vehicle to an Acura dealer. …”

NHTSA complaint #11507643, filed 2023-02

“The contact leased a 2021 Acura TLX. The contact stated that while driving the vehicle, a loud abnormal, squealing noise would emit from the brake pedal upon depression without warning. The contact had taken the vehicle back to the dealer where they acknowledged the failure but stated that the parts for the repair were not yet available. The contact was given a loaner vehicle of the same model; however, the same failure occurred with the loaner vehicle. The contact returned to the dealer for the third time and was given a loaner vehicle of a different model. …”

NHTSA complaint #11455498, filed 2022-03, 11 miles

Forward collision avoidance: other model years

YearComplaintsShare of year
202228%
2021811%
202058%
201955%
201888%
201723%
201622%
201572%

Other parts of the 2021 Acura TLX

Transmission and drivetrain
28 complaints
Brakes
11 complaints
Electrical system
10 complaints
Other or unknown
10 complaints
Air bags
8 complaints
Fuel system
6 complaints
Suspension
6 complaints
Engine
5 complaints
Lane departure
3 complaints
Steering
3 complaints
Back-over prevention (rear camera)
1 complaints
Equipment
1 complaints

← All problems reported for the 2021 Acura TLX

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