Vehicle Data Hub

2003 Chevrolet Impala engine problems

162 complaints about engine have been filed for the 2003 Chevrolet Impala, which is 17% of all its NHTSA complaints. It is the 2nd most reported problem area for this model year.

At a glance

Complaints
162 17% of this year's complaints
Typical mileage
105,000 miles 103 complaints with mileage
Crashes and fires
1 and 27
Injuries and deaths
1 and 0

Source: NHTSA owner complaints

When engine problems show up

Engine complaints by mileage, 2003 Chevrolet Impala Complaints by odometer reading in 20,000-mile steps. The median is about 105,000 miles. 0k to 20k miles: 5 complaints 20k to 40k miles: 2 complaints 40k to 60k miles: 13 complaints 60k to 80k miles: 17 complaints 80k to 100k miles: 8 complaints 100k to 120k miles: 17 complaints 120k to 140k miles: 10 complaints 140k to 160k miles: 12 complaints 160k to 180k miles: 6 complaints 180k to 200k miles: 4 complaints 200k+ miles: 9 complaints 040k80k120k160k200k miles Typical: 105,000 miles
Based on 103 complaints that include mileage. 19% were reported before 60,000 miles. The amber marker shows the median: half of these complaints happened before that mileage.
View the numbers
MileageComplaints
0k to 20k miles5
20k to 40k miles2
40k to 60k miles13
60k to 80k miles17
80k to 100k miles8
100k to 120k miles17
120k to 140k miles10
140k to 160k miles12
160k to 180k miles6
180k to 200k miles4
200k+ miles9

What the data shows

Of the 103 engine complaints that report mileage, the median is about 105,000 miles, and 19% were reported before 60,000 miles.

These complaints mention 1 crash, 27 fires, 1 injury.

What owners wrote

Tl* the contact owns a 2003 chevrolet impala. The contact received a recall notification for nhsta campaign number: 14v400000 (electrical system). While driving 10-20 MPH, the vehicle stalled and the check engine indicator illuminated. The failure contributed to six crashes. Two police reports were filed. The contact's husband sustained injuries to the neck and back and received medical attention. The vehicle was taken to a mechanic, but the results of the diagnostic test were unknown.

Reported at 105,000 miles, July 2007 CrashInjury

Had to have upper and lower manifold gasket replaced on 2003 impala. Sound of water within the dash. TSB on same issue back in 2000 GM is aware of this why aren't owners being helped with faulty gaskets. Tbs #03034 NHTSA #10003430. Why are we in a position to damage an engine or worse and GM has no responsibility in such a crucial componet. Its affected every model year impala 2000-2003 many tbs's listed each year. They repaired my impala at full cost to(48k.) me.

Reported at 48,350 miles, May 2006

Other problems reported for the 2003 Chevrolet Impala

Engine problems in other years

Engine problems across all Chevrolet models