2007 Hummer H3 Electrical System Problems

NHTSA component category: ELECTRICAL SYSTEM · data through 07/14/2026

69Electrical System complaints

29.1%Of all 237 complaints

#1Most-reported category

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

How electrical system ranks on this vehicle

ELECTRICAL SYSTEM69 · 29.1%

ENGINE44 · 18.6%

Unspecified / other25 · 10.5%

VISIBILITY/WIPER24 · 10.1%

POWER TRAIN16 · 6.8%

Share of the 237 complaints citing each category; one complaint can cite several. Full breakdown on the 2007 Hummer H3 overview page.

What owners report

“THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE KEY FAILED TO TURN IN ORDER TO START THE VEHICLE. IN ADDITION, THE…”NHTSA complaint 10808436 — filed 12/04/2015

“THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WHEN THE VEHICLE WAS STARTED, THE HEATER AND DEFROSTER WERE INOPERABLE. THE CONTACT ALSO…”NHTSA complaint 10808125 — filed 12/03/2015

“WENT OUT TO START HUMMER WOULD NOT START IT TURNS OVER BUT WILL NOT START WAITED A FEW MINUTES AND IT STARTED UP WITH NO…”NHTSA complaint 10790446 — filed 11/15/2015

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

Electrical System complaints by year filed

Frequently asked questions

Does the 2007 Hummer H3 have electrical system problems?

Electrical System is the most-reported problem area on the 2007 Hummer H3: 69 of 237 complaints on file (29.1%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2007 Hummer H3 have in total?

237 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 12 involved a crash, 18 involved a fire, 19 reported injuries, and none reported deaths.

What does NHTSA's electrical system category include?

NHTSA assigns each complaint to standard component categories; this page reports the ELECTRICAL SYSTEM 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.