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definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
21,964 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Ford Mustang engine problems

engine problem

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2003 Ford Mustang Owner Comments

problem #12

May 172011


  • 73,000 miles


Engine stalls when parking or coasting at 5 to 10 mph or when coming to a stop.

- San Francisco , CA, USA

problem #11

Nov 012009


  • miles
The contact owns a 2003 Ford Mustang. The contact stated that black micro fibers were emitted into the vehicle from the vents through the air conditioning system. The dealer advised the contact to bring the vehicle in for diagnostic testing but the vehicle was neither diagnosed nor repaired. The manufacturer was made aware of the failure. The current mileage was 30,000 and the approximate failure mileage was unknown.

- Hamet, CA, USA

problem #10

Apr 072008

Mustang 8-cyl

  • Manual transmission
  • 92,000 miles
The contact owns a 2003 Ford Mustang. While driving 30 mph, the vehicle began making a loud popping sound. The contact stopped the vehicle and called for assistance. The vehicle was towed to her residence. She looked under the hood and noticed that the number 8 spark plug had become detached. The powertrain was unknown. The failure mileage was 92,000 and current mileage was 93,000.

- Bowie, MD, USA

problem #9

Jul 042007

Mustang 8-cyl

  • Automatic transmission
  • 74,000 miles


5 of my spark plugs on my 2003 Mustang GT 4.6 popped out of the spark plug hole in the cylinder head.all these spark plugs popped out at different times,2 spark plugs holes were striped out and had to be tapped out. This all happened on the right side of the motor too.

- Cedar Lake, IN, USA

problem #8

Sep 132005


  • Automatic transmission
  • 5,000 miles
I purchased a brand new 2003 Ford mustang cobra convertible in placentia, ca and was very excited to have my first mustang. I am 32 and married with two children ages 13 and 5 so our other car is a minivan. In the end, as you will see in this description, this was the worst purchase I have ever made in regards to a vehicle. After around 7,000-9,000 miles ( I would have to pull the paperwork as I am at work now) the car over-heated on the freeway and during the overheating the car shut down forcing me to lose power steering and the car began to drift left in to the other lane. I pumped the clutch several times and successfully was able to get the car running just far enough to pull over to the shoulder and call a tow truck. It could have been a lot worse since traffic was moving around 65-70 mph. The car was sent to fritts Ford in riverside, ca and I found out that not only was the radiator cap cracked as well as the radiator but the catalytic converter (I know my spelling is wrong here) needed to be replaced for some reason. I believe they said it had a hole in it which I can't believe after only 7K-9K miles. I also believe they replaced the thermostat. It was too long after I received the car back (about 3K-5K miles) that the overheating happened again, the engine shut down, etc and I was forced to the side of the road and again luckily was not hit by another car. The car was back at the dealer and the radiator and thermostat were replaced I believe. Since then I have moved to Texas and the same thing has occurred three times in the last 3 months. Each time (well the first two since the last one just happened last night) I was told the thermostat was bad and needed to be replaced. I guarantee now that the car is at bob tomes Ford in mckinney Texas for the 3rd time with only 22,000 total miles that the thermostat was bad again and needed to be replaced.

- Mckinney, TX, USA

problem #7

Jan 052005

Mustang 6-cyl

  • Automatic transmission
  • 10,500 miles
Check engine light has come on 4 times since I have owned the car first time my machanic cleared P0460 code. 2nd time Ford cleared P0460 code 3 rd time I unhooked negetive battery post and cleared

- Hamden , CT, USA

problem #6

Aug 052003


  • Automatic transmission
  • 2,949 miles


The steering wheel vibrated. Consumer took the vehicle to the dealer, and they rotated the tires. The problem got worse. Then, consumer took the vehicle back to dealer several times, and the following had been done; the front end, rear end realigned, and wheel balanced. Then, vehicle broke down, and was towed. Rear end was replaced since it was cracked. Violent steering wheel shaking still exists.

- Houston, TX, USA

problem #5

Aug 082004

Mustang 8-cyl

  • Manual transmission
  • 6,000 miles
I purchased a new 2003 Ford Mustang cobra on christmas eve 2002. Around 2000 miles, I began to notice that the car was having problems with the drivability. I thought that it may be a little quirk that would work itself out during the break-in period. Needless to say, it hasn't. the first problem began with the engine running roughly. I took the vehicle in and had it inspected at 6,000 miles. The engine began stalling during deceleration and also had power cutting off during take off. This has been a daily occurrance since that time. The car now has 15,000 miles on it and has had several other problems. This recurring problem has had the car in the shop six different times with six failures to correct the problem. The car had the transmission replaced at 12,000 miles. The air conditioning is now cycling where it blows no cold air for short periods of time. The adhesive seal for the spoiler is coming loose and the rear bumper cover is warping as have previous Mustangs I have owned. The drivability concern is a hazard to say the least. I have had no fewer than a dozen different occasions where I narrowly escaped a major collision due to the engine bogging down. The vehicle has been in Ford's repair facility for more than 4 cummulative weeks for repairs. It is going back in again very soon. I went through Ford's arbitration board which was an absolute joke and waste of my time. The board cited that "drivability concerns still exist, however Ford has not been granted sufficient time to diagnose the problem". each time it has been in, I have said, I don't want the car back until it is corrected. Ford also tries to claim that vehicle was only in for service three time according to the report, despite the fact that I have several work orders that say otherwise. I would like anyone who has had or still does have a similar issue to contact me. This car is a lemon, that Ford does not want to correct.

- Decatur , GA, USA

problem #4

May 302004


  • miles
2003 Mustang. While driving in a hard down pour I went through a puddle causing the breather to suck up some water and blowing my engine. I went to the dealer and they told me Ford would not fix the problem. It is still under warranty with less than 20,000 miles. They also informed me this has happened before to others. It has stalled on me before while driving in the rain.

- Anderson, IN, USA

problem #3

Oct 152003


  • miles
While driving at an undetermined speed vehicle stalled, causing the consumer to pull off the road.

- Chattanooga, TN, USA

problem #2

Dec 052003


  • miles
2003 Ford Mustang cobra - on two occasions while coming to a stop, the engine died, leaving no power assisted steering or braking. Luckily, nothing was in front of me. Svt dealer rep states they're aware of problem but don't know how to fix it. He relayed possible deaths have occurred because of this problem but no alternative at this time other than to park vehicle.

- Kyle, TX, USA

problem #1

Nov 182003

Mustang 8-cyl

  • Manual transmission
  • 115 miles
2003 Ford Mustang cobra purchased on 11/08/03, vehicle will stall without warning when clutch is depressed. Often this happens when coming to a stop and shifting gears. When this happens the brakes and steering immediately stop working. Currently to date no adequate repair for this problem.

- Aliso Viejo, CA, USA

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