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What 55 owners told NHTSA about the 2021 Ford Mustang

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (55)Crash / fire / injury (4)Fuel system (15)Transmission & drivetrain (9)Engine (8)Electrical system (6)Brakes (5)Backup camera & sensors (4)Suspension (3)Airbags (2)Engine & cooling (2)Visibility & wipers (2)

Newest first · 55 complaints · page 3 of 3

Jun 22, 2022Brakes

The contact owns a 2021 Ford Mustang. The contact stated that the brake fluid low warning light failed to illuminate to alert him that the brake fluid level was low. The vehicle was taken to the dealer; however, the dealer was unable to correct the failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 6,000.

NHTSA ODI 11470394

Jun 15, 2022Engine

The contact owns a 2021 Ford Mustang. The contact stated that immediately after purchasing the vehicle new, the engine experienced random misfire, causing the vehicle to lose motive power and acceleration. During the failure, the check engine warning light was illuminated. The vehicle was taken to the local dealer who reprogrammed the engine computer and replaced the camshaft sensor however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was 700.

NHTSA ODI 11469341

Mar 23, 2022Seat belts

The contact owns a 2021 Ford Mustang. The contact stated that while operating the vehicle, the driver’s and passenger’s side seat belts would remain positioned on the occupant’s neck area instead of the shoulder region. The contacted stated that after securing the seat belts, the strap would move from the occupant’s shoulder area and rest on the occupant’s neck. The cause of the failure was not determined. The local dealer was notified of the failure. The manufacturer was not yet contacted. The failure mileage was 10.

NHTSA ODI 11457969

Mar 9, 2022Visibility & wipers

The contact owns a 2021 Ford Mustang. The contact stated while driving and exceeding 50 MPH, the rear-view mirror would vibrate. The contact took the vehicle to the dealer where it was diagnosed and the mirror was replaced three times. Additionally, the mechanic installed a new driveshaft; however, failure persisted. The contact notified the manufacturer and was informed that the vibration was a characteristic of the vehicle. The vehicle was not repaired. The approximate failure mileage was 1,000.

NHTSA ODI 11455827

Nov 26, 2021

Purchased vehicle new It took me a long time to understand what the issue was. I complained to Ford and they gave me account rep that has never driven manual transmission. When I contacted Ford the end result was they have found nothing and car is operating normally. My issue : "driver assist" on clutch. It auto revs the throttle and is extremely inconsistent. I can forward to 20 second videos it needed. Problem is with the clutch and brake pedal. Releasing brake pedal causes engine to rev anywhere from 900-1500 rpm. Problem is driving in slow traffic scanario when you have have to two-foot clutch and brake. Engine will want to take off. I have had almost two near rear end collisions. The rev is uncontrollably inconsistent. One example: I was following a car running 2 miles per hour in an ally. Not following that close. At normal idle the mustang is about 5 miles per hour so I was catching them. I pushed clutch and brake to slow down. Then released the pedals the car unexpectedly surged forward. The problem wouldn't be so bad if it were consistent or would be disabled if the car is already moving.

NHTSA ODI 11441741

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Working with the data? Download all 55 complaints as CSV · fetched from NHTSA July 10, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 Ford Mustang verdict →