What are the most common Ford Mustang problems?
According to Au7o's analysis of 21,160+ owner reports, the 2021 Ford Mustang has 14 documented issues. The most frequently reported are: MT82 Manual Transmission Grinding and Shifting Issues, Independent Rear Suspension Clunk and Noise Over Bumps, 10R80 10-Speed Automatic Harsh Shifting and Hesitation. Of these, 1 is rated critical and should be addressed promptly.
Is the Ford Mustang reliable?
The 2021 Ford Mustang has 14 known issues documented across 21,160+ owner reports. 1 issue is rated critical: MT82 Manual Transmission Grinding and Shifting Issues. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Ford Mustang problems?
Repair costs for known Ford Mustang issues range from $0 to $7,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, MT82 Manual Transmission Grinding and Shifting Issues, typically costs $150-$6,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2015-2023 Ford Mustang MT82 Manual Transmission Grinding and Shifting Issues?
The MT82 6-speed manual transmission is notorious for multiple issues including gear grinding (especially 1st to 2nd and into 3rd gear when cold), high RPM lockout preventing shifts, notchy/difficult shifts, premature synchronizer wear, and in severe cases complete transmission f… Repairs typically run $150-$6,000. Severity: high.
What is the 2015-2023 Ford Mustang Independent Rear Suspension Clunk and Noise Over Bumps?
The S550 Mustang's independent rear suspension (IRS) is prone to developing clunking or knocking noises when going over bumps, accelerating from a stop, or during cornering. Common causes include loose sway bar end links, loose subframe bolts, worn or binding shock mounts, loose… Repairs typically run $50-$600. Severity: medium.
What is the 2018-2023 Ford Mustang 10R80 10-Speed Automatic Harsh Shifting and Hesitation?
The 10R80 10-speed automatic transmission exhibits issues including harsh or jerky shifting, gear hunting (constantly searching for the right gear), hesitation during acceleration, unexpected downshifts, and transmission whining. The transmission's aluminum outer shells can devel… Repairs typically run $0-$7,000. Severity: medium.
What is the 2015-2023 Ford Mustang Backup Camera Intermittent Failure and Black Screen?
The backup camera frequently exhibits intermittent operation, showing a black or blank screen when reverse is engaged. The issue is often caused by wiring being pinched in the trunk lid, corroded connections at the rear license plate light area, or a failing camera unit. Repairs typically run $50-$600. Severity: medium.
What is the 2015-2023 Ford Mustang Brake Pedal Bumper Failure Causing Limp Mode and Battery Drain?
A small plastic clip called the brake pedal bumper/stopper can break and fall out of position, causing the brake light switch to remain constantly engaged. This results in brake lights staying on even when the pedal is released (including when the car is off, draining the battery… Repairs typically run $2-$250. Severity: medium.
What is the 2015-2023 Ford Mustang Brake Booster Hissing/Failure (Track-Driven)?
Performance Mustangs (GT350, GT500, Mach 1) that are tracked or driven hard can experience brake booster failures or vacuum leaks, causing a hissing sound and harder brake pedal feel. The standard brake booster is undersized for sustained track use. Repairs typically run $300-$1,500. Severity: medium.
What is the 2015-2021 Ford Mustang P0430 — Bank 2 Catalytic Converter Efficiency Loss (Driver-Side Cat, TSB 19-2201)?
P0430 is the Bank 2 (driver-side) mirror of P0420 on the 5.0L Coyote Mustang. On 2018-2019 5.0L cars with the automatic, a set P0430 almost always points to a failed driver-side catalytic converter — this is a documented factory issue covered by Ford TSB 19-2201 for cars built on… Repairs typically run $120-$1,600. Severity: medium.
What is the 2015-2023 Ford Mustang Manual Transmission Hydraulic Clutch Pedal Sticks to the Floor?
S550 Mustangs with the 6-speed manual can have the clutch pedal stick on or near the floor and fail to return, most often during spirited or high-RPM driving and in hot weather. The cause is the hydraulic clutch actuation circuit - air ingestion, a degraded/flexing factory plasti… Repairs typically run $100-$1,200. Severity: medium.
What is the 2015-2023 Ford Mustang 2.3L EcoBoost Turbo Wastegate Rattle and P0299 Underboost / Limp Mode?
The 2.3L EcoBoost's turbocharger wastegate develops play in the actuator linkage - a missing/worn wave spring and a loose wastegate arm let the flapper rattle, and the actuator can stop holding boost. As it wears the engine logs P0299 (underboost) and drops into reduced-power lim… Repairs typically run $150-$2,200. Severity: medium.
What is the 2015-2021 Ford Mustang P0420 — Bank 1 Catalytic Converter Efficiency Loss (Passenger-Side Cat / Downstream O2 Sensor)?
On the Coyote 5.0L Mustang GT, P0420 sets when the Bank 1 (passenger-side) downstream oxygen sensor sees the rear catalyst behaving too much like the front sensor, meaning the catalyst is no longer scrubbing exhaust efficiently. On 2018-2019 5.0L cars this is a recognized factory… Repairs typically run $120-$1,600. Severity: medium.
What is the 2020-2022 Ford Mustang Shelby GT500 TR-9070 DCT Overheating, Derate, and Cooler-Line Failures (Track Use)?
The 2020-2022 GT500's Tremec TR-9070 7-speed dual-clutch transmission overheats under sustained track use, throwing 'Transmission Too Hot' and 'Clutch Pack Too Hot' messages and derating the car (forced short-shifting / reduced output) once fluid temps climb, especially above ~90… Repairs typically run $300-$2,500. Severity: medium.
What is the 2015-2023 Ford Mustang 5.0L Coyote Engine Tick/Knock Noise at Idle?
Two distinct tick patterns affect 5.0L Coyote V8 in 2015-2023 Mustang depending on engine generation. Gen 2 Coyote (2015-2017): light tick at idle and on cold start, commonly attributed to valve lash / lifter operation; generally cosmetic and not associated with engine damage. Ge… Repairs typically run $0-$3,000. Severity: low.
What is the 2015-2023 Ford Mustang HVAC Blend Door Actuator Failure?
The HVAC blend door actuators can fail, causing clicking noises from the dashboard, inability to control air temperature, or air only blowing hot or cold. The actuators are plastic and prone to gear stripping. Multiple actuators may fail over time. Repairs typically run $50-$400. Severity: low.
What is the 2015-2023 Ford Mustang P0442 — Small EVAP Leak from Failing Canister Purge Valve (Recurring Revised Part)?
On the S550 Mustang (both 2.3L EcoBoost and 5.0L GT), P0442 (small EVAP leak) most commonly traces to the canister purge valve solenoid, a part Ford has revised through numerous part-number iterations because the original design fails repeatedly. EcoBoost owners report installing… Repairs typically run $20-$350. Severity: low.
