1999 Ford Mustang GT problems & reliability
36 owner complaints filed with NHTSA for the 1999 Ford Mustang GT. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
2 complaints report injuries (5 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling → | 21 | 58% |
| Vehicle Speed Control | 4 | 11% |
| Air Bags | 2 | 6% |
| Electrical System | 2 | 6% |
| Power Train | 2 | 6% |
| Seat Belts | 2 | 6% |
| Seats | 2 | 6% |
| Engine | 1 | 3% |
| Suspension | 1 | 3% |
| Tires | 1 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 56,650 miles (middle 50% between 40,848 and 89,679 miles), based on 27 complaints that included mileage.
Complaints by incident year
What owners report
“The car was built with a plastic intake manifold. The manifold began leaking at the thermostat housing and then the heater hose connection on the intake manifold suddenly broke. I now have to have the entire intake manifold replaced because of poor design and material selection. Ford knew of the problem but refuses to…”
Engine · filed Jul 17, 2014
“Hearing a exhaust leak like noise and around the spark plug there is air coming out of the heads causing them to eventually blow out and I will be very upset if ford don't replace it since it is happening to alot of cars!!! *tr”
Engine and Engine Cooling · filed Jul 10, 2009
“Slowing down for a stop sign when the 3 rd spark plug blew out on the passenger side of my 1999 mustang gt with a 4.6 v8 . It also destroyed the coil on top of the plug. *tr”
Engine and Engine Cooling · filed Oct 30, 2008
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- SPARK PLUG EJECTION FROM CYLINDER HEAD
Defect Petition DP05005 · opened Sep 22, 2005 · closed Jan 4, 2006
Technical service bulletins
5 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 Ford Mustang GT.
Ford: certain 1999-2001 model year vehicles up to 6000 lb gvwr registered in new york and certain 2001 vehicles up to 6000 lb gvwr registered in the state of maine, certified for sale in california-federal emission…
CSP-08B01 · Service Bulletin/Repair Instructions · issued May 16, 2008
Some vehicles with manual transmission or with automatic transmission may exhibit a front end accessory drive (fead) belt that has become broken or frayed and / or detach from the engine. *tt
13950 · Service Bulletin/Repair Instructions · issued Mar 1, 2001
Some vehicles equipped with manual transmission and with automatic transmission may exhibit a front end accessory drive (fead) belt that has become broken or frayed and / or detach from the engine. *tt
8278 · Service Bulletin/Repair Instructions · issued Apr 1, 2000
Some vehicles equipped with manual transmission and with automatic transmission may exhibit a front end accessory drive (fead) belt that has become broken or frayed and / or detach from the engine. *tt
13950 · Service Bulletin/Repair Instructions · issued Mar 1, 2000
Some vehicles with manual and automatic transmissions may exhibit a front end accessory drive (fead) belt that has become broken or frayed and / or detached from the engine. *tt
8278 · Service Bulletin/Repair Instructions · issued Mar 1, 2000
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1999 Ford Mustang GT in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1999 Ford Mustang GT?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 56,650 miles — budget accordingly if the car is approaching that mileage.