Is the 2007 Hummer H3 a bad year?
238 owner complaints to NHTSA. Engine and transmission complaints are in line with other H3 years.
Keep it
Engine and transmission complaints for the 2007 Hummer H3 are in line with other H3 years. Electrical system and visibility and wipers stand out for this year: see below.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2007 H3 owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 90,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Electrical systemSTANDS OUT | 76 (32%) | 64k–119k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Visibility and wipersSTANDS OUT | 42 (18%) | 71k–116k miles · around this mileage | — |
| Engine | 55 (23%) | 57k–110k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Body structure | 22 (9%) | 45k–134k miles · around this mileage | — |
| Air bags | 19 (8%) | 42k–120k miles · around this mileage | — |
| Transmission and drivetrain | 19 (8%) | 20k–90k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| Suspension | 6 (3%) | 54k–111k miles · around this mileage | Ball joint replacement (one joint) $200–$500 · Control arm replacement (one arm) $200–$900 |
| Brakes | 11 (5%) | 12k–70k miles · mostly behind | — |
| Steering | 5 (2%) | 14k–82k miles · mostly behind | — |
| Fuel system | 12 (5%) | too few with a mileage | — |
| Stability control | 12 (5%) | too few with a mileage | — |
| Equipment | 9 (4%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 90,000 miles. Not a quote.
What owners reported alongside their complaints
Of 238 complaints: 12 mention a crash · 18 mention a fire · 13 report an injury · 11 say the car was towed.
2 complaints were filed in the last 12 months, the newest in Oct 2026.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
I was driving on the express way when I noticed my engine rev real high. I looked at the rpm's and it was almost red lined.
On 3/13/2020 my wife was driving our 2007 Hummer H3 when the engine compartment and dash area caught on fire. The blower motor connector module had been replaced recently as part of a safety recall.
My vehicle has a cracked radiator and according to other Hummer owners this is a common defect that happens to these vehicles.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 90,000 miles), not by content. Unverified.
Recalls for the 2007 Hummer H3: 2
In the affected vehicles, the connector module that controls the blower motor speed for the heating, ventilation and air conditioning system may overheat. If the blower motor connector module overheats, it can increase the risk of a fire.
Some of these vehicles have a condition in which the integral clip-tabs on the louver on the hood may fracture, causing the hood louver rattle against the hood and become loose. If this indicator is unnoticed, additional clips could fracture and the hood louver could detach from the vehicle. If the vehicle is being driving when this occurs, it could strike a following vehicle and cause injury and/or property damage.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Hummer: 244
Repair instructions Hummer sent its dealers for symptoms seen in the shop on the 2007 Hummer H3. Ask a dealer or mechanic for a bulletin by its number.
Rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up
Guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system
Proper way to install the pistons in an engine
Will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
Neighbouring years
2006 H3: 361 complaints, keep it · 2008 H3: 113 complaints, keep it.
Every Hummer H3 year
2003 · 2006 · 2007 · 2008 · 2009 · 2010 · All H3 years side by side
Other Hummer models: Hummer H2. All makes and models.
Questions
Is the 2007 Hummer H3 a bad year?
238 owner complaints to NHTSA. Engine and transmission complaints are in line with other H3 years. At 90,000 miles the tool says: Keep it.
What are the most common problems with the 2007 Hummer H3?
By owner complaints to NHTSA: electrical system (76), visibility and wipers (42), engine (55), body structure (22), air bags (19).
How many recalls does the 2007 Hummer H3 have?
2 recall campaigns list this model year: Visibility and wipers (NHTSA 15V-421), Body structure (NHTSA 10V-179). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.