2007 Hummer H3 Electrical System Problems
Owners have filed 76 complaints with NHTSA about electrical system problems on the 2007 Hummer H3, 32% of all complaints for this model year. Half of the reports with a mileage happened before 90,000 miles. The words owners use most often: “wiring harness” (11% of reports).
- 76electrical system complaints
- 90,000median miles at failure
- 1mention a crash
- 0mention an injury
- 0related recalls
- 35%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Wiring harness: mentioned in 8 of 76 complaints (11%)
- Blower motor: mentioned in 7 of 76 complaints (9%)
- Failed start: mentioned in 6 of 76 complaints (8%)
- Air conditioning: mentioned in 5 of 76 complaints (7%)
At what mileage do electrical system problems happen?
Based on 69 complaints that reported the odometer reading.
How serious are the reports?
Of 76 complaints, 1 mention a crash, 14 a fire.
Hummer H3 electrical system complaints by model year
When owners reported it
Related recalls (0)
No safety recall lists electrical system for the 2007 Hummer H3. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The contact owned a 2007 Hummer H3. The contact stated that while the vehicle was parked, the AC was turned on, and the contact became aware of smoke entering the cabin of the vehicle. The smoke was coming from the front passenger's side underneath the dashboard. The AC was turned off, and the…
Odometer Fraud. The contact purchased a 2007 Hummer H3. The contact discovered that there was a mileage discrepancy. The vehicle was an independent dealer sale. At the time of purchase, the vehicle mileage was 122,791 and at the time of registration, it was discovered that the mileage was 122,799…
Ignition switch stays on with key off and out and alarm goes off sometimes just sitting and battery goes dead
Frequently asked questions
Do all 2007 Hummer H3s have electrical system problems?
No. NHTSA has 76 owner complaints about electrical system for the 2007 Hummer H3 (32% of the 238 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2007 Hummer H3 electrical system?
No recall currently lists electrical system for this vehicle.
At what mileage do electrical system problems start?
The median reported mileage is 90,000 miles: half of the reports with a mileage came before that.
What do owners say about electrical system problems on the 2007 Hummer H3?
The most frequent phrase is “wiring harness”, in 8 of 76 complaints, followed by “blower motor” (7).
See all 2007 Hummer H3 problems or electrical system problems across all H3 years.