1999 Ford Mustang Engine cooling Problems
- Complaints
- 31about this part
- Share
- 15%of 213 total for the year
- Median mileage
- 59,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 31 complaints about the engine cooling of the 1999 Ford Mustang, 15% of the 213 complaints for this model year. Where a mileage was given, the median is 59,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“On january 3, 2005, the heater core on my 1999 Mustang had to be completely replaced, including the thermostat. The windows had fogged up before and the car smelled like syrup but I thought it was just vents. The heating core had to be replaced and the coolant had to be recharged and replaced also this came up to $700 dollars. On august 16 2005, 2 weeks after changing the coolant the water pump had to be replaced, once again the system had to be flushed the cost was$400. …”
NHTSA complaint #10168452, filed 2006-09, 53,396 miles“I have a 1999 Mustang 3.8l-v6. Recently, the car began to expel a white vapor from the tailpipe when the engine is hot, along with a vibration noise. This has happened as many as 2-3 times per day. I took the car to a Ford dealer for service and replaced an air pump. This did not correct the problem. I did some research on the internet and found that many people have had the same problem which turned out to be due to blown head gaskets. I discussed that issue with the dealer representative and they said that there is no record of that kind of problem with a 1999 Mustang. …”
NHTSA complaint #10062466, filed 2004-03, 59,000 miles“Dt: caller's says vehicle had a cracked manifold intake. Caller believed this part should not break down. Dealer and manufacturer did offer him any help. Caller had to replace the gasket two years ago, and it was getting worse all the time.”
NHTSA complaint #10130034, filed 2005-09, 65,000 miles“The contact owns a 1999 Ford Mustang. The contact stated the vehicle had a cracked manifold and it was leaking antifreeze. The vehicle was taken to a mechanic who stated that the manifold needed to be replaced. The dealer was contacted and offered no assistance. The manufacturer informed him that there were no recalls or warranties and offered no assistance. The failure mileage was 67,000.”
NHTSA complaint #10396750, filed 2011-04, 67,000 miles“The pulley slides on to an aluminum sleeve that is part of the front plate on the engine. I was doing a routine inspection when I noticed the pulley slightly tilted. I applied pressure to the belt and was able to pull the pulley, bolt that goes into the plate to hold the pulley on, and the metal sleeve that was broken off of the front engine plate. If this pulley would have came off, the belt would have been instantly frayed by an adjacent engine component resulting in loss of control of the vehicle and possibly power steering. …”
NHTSA complaint #747131, filed 2001-06Related service bulletins
- 10026389May 16, 2008Ford: 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…
- 10023943Oct 1, 2007Some 1997-2008 vehicles equipped with a 4.6l 2v, 5.4l 2v, or 6.8l 2v engine--spark plug thread repair procedure--not covered under new vehicle limited warranty. *nj this includes…
- 10018959Dec 14, 2005Extended coverage program 05n04 - extended coverage for composite intake manifold. This program is being provided as a settlement to a class action lawsuit. The terms of the…
- 10018745Nov 14, 2005Wds cop kit diagnostic tip - coil on plug (cop) ignition systems - engine misfire or rough running.
- 10013368Nov 1, 2004Exhaust leak - cracked or separated right side exhaust pipe - 3.8l and 3.9l engines.
- 10011162Aug 23, 2004Engine misfire or running - coil on plug (cop) ignition systems - wds cop kit diagnostic tips. To include various 2005 models. * ar this article 04161 supersedes tsb 03-14-04.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 1 | 5% |
| 2022 | 1 | 2% |
| 2021 | 2 | 4% |
| 2020 | 3 | 2% |
| 2019 | 11 | 7% |
| 2018 | 8 | 4% |
| 2017 | 8 | 3% |
| 2016 | 8 | 2% |
| 2014 | 1 | 0% |
| 2013 | 1 | 0% |
| 2012 | 3 | 1% |
| 2011 | 7 | 2% |
| 2010 | 4 | 2% |
| 2009 | 1 | 1% |
| 2008 | 2 | 1% |
| 2007 | 5 | 1% |
| 2006 | 16 | 4% |
| 2005 | 25 | 4% |
| 2004 | 6 | 5% |
| 2003 | 39 | 27% |
| 2002 | 22 | 19% |
| 2001 | 24 | 14% |
| 2000 | 34 | 11% |
| 1999 | 31 | 15% |
| 1998 | 40 | 17% |
| 1997 | 38 | 22% |
| 1996 | 82 | 33% |
| 1995 | 339 | 56% |
| 1994 | 160 | 45% |
| 1993 | 11 | 11% |
| 1992 | 7 | 10% |
| 1991 | 6 | 8% |
| 1990 | 10 | 12% |
| 1989 | 6 | 6% |
| 1988 | 4 | 4% |
| 1987 | 5 | 13% |
| 1986 | 5 | 17% |
| 1985 | 2 | 13% |
| 1984 | 4 | 22% |
| 1983 | 1 | 20% |
Other parts of the 1999 Ford Mustang
44 complaintsAir bags
32 complaintsTransmission and drivetrain
25 complaintsVehicle speed control
25 complaintsSeat belts
19 complaintsTires
11 complaintsElectrical system
10 complaintsSteering
10 complaintsSeats
9 complaintsBody and structure
9 complaintsSuspension
9 complaintsFuel system
8 complaints
← All problems reported for the 1999 Ford Mustang
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