AI Damage1999 Ford Mustang Convertible reliability: common problems
Owners of the 1999 Ford Mustang Convertible filed 9 complaints with NHTSA, most often about powertrain and engine and cooling. Details by component below, with sources.
Key figures
- Owner complaints
- 9
- involving a crash
- 1
What fails most often
- 1 Powertrain 33% of all complaints
- 2 Engine and cooling 22% of all complaints
- 3 Exterior lighting 22% of all complaints
- 4 Engine 11% of all complaints
- 5 Fuel/propulsion system 11% of all complaints
- 6 Parking brake 11% of all complaints
- 7 Seat belts 11% of all complaints
- Powertrain: 3 complaints (33% of all).
- Engine and cooling: 2 complaints (22% of all).
- Exterior lighting: 2 complaints (22% of all).
- Engine: 1 complaints (11% of all).
- Fuel/propulsion system: 1 complaints (11% of all).
Symptoms owners describe
How many of the 9 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Powertrain | 3 | 0 | 0 |
| Engine and cooling | 2 | 0 | 0 |
| Exterior lighting | 2 | 0 | 0 |
| Engine | 1 | 0 | 0 |
| Fuel/propulsion system | 1 | 0 | 0 |
| Parking brake | 1 | 1 | 0 |
| Seat belts | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While in church, the emergency brake on my car failed, and my car rolled backwards, a block and a half through an intersection and was hit by a city bus, before landing against a tree. The police towed my car away.
Heater core failure. Convertible top deteriorating. Fuel pump failure all less than 1200000
Swe purchased our 1999 ford mustang gt new and a 25k miles yhe rear end differential was making a lot of noise. Ford replaced the entire third member unit and all carrier bearings.
Spark plug blow out. There was really nothing that led up to this that I know of. Apparently this is something that happens a lot to ford vehicles (I have a 99 mustang v8). Ford recommended a new head ($2000). An alternative was to retape the head ($800).
Dt*: the contact stated while driving 35mph, the check engine and coolant light illuminated. The contact pulled over and after initial inspection determined coolant had leaked from the intake manifold. The vehicle was driven to the dealership who determined the intake manifold was fractured.
Vehicle is 1999 ford mustang, 3.8 liter engine with 5-speed manual transmission. Dealer replaced clutch,throwout bearing and pressure plate at approx. 2000 miles for original owner. Dealer did same work for myself (2nd owner) at approx. 20,000 miles. Car now has 54000 miles and clutch work is again needed.
The rear passenger seat belts do not extract. This includes all of the rear seat belts. The rear passengers are unable to use the seat belts.
Complaint received via e-mail headlamp lenses on my 1999 mustang v-6 have become so etched that they fail to properly illuminate for night operation. I have 84,000 miles on the vehicle but have never had a vehicle headlamp lenses that degraded in this way.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 10,593 of 32,257 model years in the NHTSA data (top 33% most complained about).
On average one model year of the Mustang Convertible has 15 complaints (9 years in the data). This year has 9, below average.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Other years of this model
Questions and answers
What are the most common problems with the 1999 Ford Mustang Convertible?
Owner complaints to NHTSA most often mention: powertrain, engine and cooling, exterior lighting. Total complaints: 9. The most frequent symptoms in complaint texts: A/C or heater (11%), fuel system, fuel smell (11%), rollaway, parking brake (11%).
How many service bulletins (TSB) were issued for the 1999 Ford Mustang Convertible?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1999 Ford Mustang Convertible from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1999 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.