2003 Chevrolet Impala Engine And Engine Cooling Problems

NHTSA component category: ENGINE AND ENGINE COOLING · data through 07/14/2026

40Engine And Engine Cooling complaints

5.8%Of all 694 complaints

#4Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine and engine cooling ranks on this vehicle

ELECTRICAL SYSTEM231 · 33.3%

ENGINE88 · 12.7%

EXTERIOR LIGHTING57 · 8.2%

ENGINE AND ENGINE COOLING40 · 5.8%

AIR BAGS28 · 4%

Share of the 694 complaints citing each category; one complaint can cite several. Full breakdown on the 2003 Chevrolet Impala overview page.

What owners report

“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…”NHTSA complaint 10158294 — filed 05/25/2006

“EXPERIENCED ENGINE TEMP FLUCTUATIONS DURING THIS TIME THE HEAT IN THE VEHICLE WOULD NOT WORK, AFTER THE CAR WAS RUNNING AND WARMED UP PROBLEM WOULD…”NHTSA complaint 10147085 — filed 01/06/2006

“TOOK CAR TO HAVE A SIMPLE OIL CHANGE, I GET A PHONE CALL INFORMING THAT I NEED MAJOR WORK DONE. I PURCHASED MY CHEVROLET IMPALA…”NHTSA complaint 10114488 — filed 03/22/2005

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine And Engine Cooling complaints by year filed

Frequently asked questions

Does the 2003 Chevrolet Impala have engine and engine cooling problems?

Engine And Engine Cooling is the #4 most-reported problem area on the 2003 Chevrolet Impala: 40 of 694 complaints on file (5.8%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2003 Chevrolet Impala have in total?

694 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 32 involved a crash, 32 involved a fire, 26 reported injuries, and none reported deaths.

What does NHTSA's engine and engine cooling category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE AND ENGINE COOLING category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/14/2026.