AI Damage2004 Hummer H2: common problems
Owners of the 2004 Hummer H2 filed 59 complaints with NHTSA, most often about electrical system and service brakes. Details by component below, with sources.
Key figures
- Owner complaints
- 59
- involving a crash
- 6
What fails most often
- 1 Electrical system 24% of all complaints
- 2 Service brakes 24% of all complaints
- 3 Visibility 22% of all complaints
- 4 Steering 10% of all complaints
- 5 Air bags 5% of all complaints
- 6 Structure 5% of all complaints
- 7 Suspension 5% of all complaints
- 8 Electronic stability control 3% of all complaints
- Electrical system: 14 complaints (24% of all).
- Service brakes: 14 complaints (24% of all), 2 of them with a crash reported by the owner.
- Visibility: 13 complaints (22% of all), 1 of them with a crash reported by the owner.
- Steering: 6 complaints (10% of all), 2 of them with a crash reported by the owner.
- Air bags: 3 complaints (5% of all), 1 of them with a crash reported by the owner.
Symptoms owners describe
How many of the 59 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 14 | 0 | 0 |
| Service brakes | 14 | 2 | 0 |
| Visibility | 13 | 1 | 0 |
| Steering | 6 | 2 | 0 |
| Air bags | 3 | 1 | 0 |
| Structure | 3 | 1 | 0 |
| Suspension | 3 | 1 | 0 |
| Electronic stability control | 2 | 0 | 0 |
| Engine | 2 | 0 | 0 |
| Powertrain | 2 | 0 | 0 |
| Engine and cooling | 1 | 0 | 0 |
| Equipment | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Latches, locks, linkages | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Extremely excessive rust on underbody of my 2004 hummer h2. Brake lines, calipers, rotors, frame, suspension, etc have holes. My brakes completely failed on the highway and I crashed into a truck and a suv. Luckily used the emergency brake to eventually stop it.
The airbags did not deploy during a car accident. There were no events leading up to this. The vehicle was not in a previous accident, nor was the air bag indicator showing that there were any issues with the air bag.
I tried to apply the brakes, brakes did not work. I tried to steer, steering was in a lock position. I hit a pedestrian hard and my car landed in my neighbor's house. When I hit the house, the 2 front wheels became detached from the car. The pedestrian that I hit has incurred many serious damages.
Later inspection by myself, local garage, insurance estimator and body shop revealed the right hand tie rod had broken which is believe caused loss of steering and accident. (3) vehicle is in body shop for repairs. Old parts are available.
Front wheel linkage failure, wheel fell off. My brother and I nearly died today from an accident in my mothers h2. We had just left a friends house and were traveling at about 35 mph when all of a sudden it seemed that the front driver side wheel broke free.
The contact owns a 2004 Hummer H2.The contact stated while driving at 35MPH, the contact stated the vehicle loss of control and forward momentum to the vehicle which caused the vehicle stalled and loss motive power.
Tl* the contact owns a 2004 hummer h2 equipped with aftermarket nitto mud grappler extreme tires, size: 37/13.5/20 (na). The tires were purchased on november 28, 2018. The contact stated that the two front tires were worn more than halfway ever since they were purchased.
The lock light comes on and my hummer will not start. This is so horrible the problem started about 3 months ago. Everytime that light comes on I have to waite 15to 25 minutes for it to start again.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 4,893 of 36,656 model years in the NHTSA data (top 13% most complained about).
On average one model year of the H2 has 40 complaints (8 years in the data). This year has 59, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Visibility. Wipers, mirrors, defrosters, cracked glass.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
Other years of this model
Questions and answers
What are the most common problems with the 2004 Hummer H2?
Owner complaints to NHTSA most often mention: electrical system, service brakes, visibility. Total complaints: 59. The most frequent symptoms in complaint texts: rust, corrosion (14%), brake failure (8%), warning lights, check engine (7%).
How many service bulletins (TSB) were issued for the 2004 Hummer H2?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2004 Hummer H2 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.