CarModelProblems.com

2006 Hummer H3 Engine Problems

NHTSA component category: ENGINE · data through 07/12/2026

52Engine complaints
14.4%Of all 360 complaints
#2Most-reported category

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

How engine ranks on this vehicle

ELECTRICAL SYSTEM90 · 25%
ENGINE52 · 14.4%
VISIBILITY/WIPER29 · 8.1%
Unspecified / other28 · 7.8%
ENGINE AND ENGINE COOLING26 · 7.2%

Share of the 360 complaints citing each category; one complaint can cite several. Full breakdown on the 2006 Hummer H3 overview page.

Engine complaints by year filed

32012920131120146201552016920172201822019120212202422025

Frequently asked questions

Does the 2006 Hummer H3 have engine problems?

Engine is the #2 most-reported problem area on the 2006 Hummer H3: 52 of 360 complaints on file (14.4%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2006 Hummer H3 have in total?

360 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 10 involved a crash, 27 involved a fire, 8 reported injuries, and 1 reported deaths.

What does NHTSA's engine category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE 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 07/12/2026.