At a Glance
Hummer has 2 identified common problems across 3 models, with the H3 being the most affected model and electrical the most common problem category. Based on 7K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read how we identify common car problems →
Below: per-model breakdowns of Hummer common problems, MOT failure rates by category, pass-rate data, and repair patterns drawn from 7K DVSA MOT tests across 20 years. Click any model to see generation-specific issues, mileage-banded fault patterns, and the most common MOT failures recorded by UK testers.
MOT Tests & Failures by Model
Top Hummer models by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that model's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Hummer Common Problems by Model
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Most Common Hummer MOT Failures
Every reason Hummer vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Number plate lamp not working | 8.16% |
| 2 | Wiper blades deteriorated | 5.87% |
| 3 | Front lamp not working | 4.98% |
| 4 | Indicator fault | 4.51% |
| 5 | Suspension joint or bush worn | 4.40% |
| 6 | Stop lamp not working | 4.31% |
| 7 | Spark ignition emissions above threshold | 3.85% |
| 8 | Brake performance below minimum | 3.67% |
| 9 | Fog lamp not working | 3.38% |
| 10 | Headlamp aim defect | 2.92% |
| 11 | Position lamp not working | 2.89% |
| 12 | Windscreen washer not working | 2.81% |
| 13 | Rear fog lamp not working | 2.78% |
| 14 | Track rod end worn | 2.75% |
| 15 | Brake disc or drum worn | 2.57% |
| 16 | Parking brake performance below minimum | 2.17% |
| 17 | Tyre condition | 2.17% |
| 18 | Catalytic converter efficiency low | 2.08% |
| 19 | Ball joint dust cover split | 2.08% |
| 20 | Brake pads or linings worn | 2.05% |
| 21 | Headlamp fault | 2.05% |
| 22 | Exhaust system fault | 1.76% |
| 23 | Brake hydraulic component worn | 1.71% |
| 24 | Airbag warning light on | 1.62% |
| 25 | Battery loose or leaking | 1.56% |
| 26 | Steering rack fault | 1.24% |
| 27 | Front suspension fault | 1.10% |
| 28 | Mirror damaged or missing | 1.07% |
| 29 | Tyre tread depth below limit | 1.04% |
| 30 | Driveshaft fault | 1.01% |
| 31 | Front suspension joint worn | 0.98% |
| 32 | Horn not working | 0.95% |
| 33 | Windscreen damage affecting view | 0.90% |
| 34 | Drag link end worn | 0.81% |
| 35 | Rear lamp not working | 0.72% |
| 36 | ABS fault | 0.64% |
| 37 | Rigid brake pipe corroded or damaged | 0.61% |
| 38 | Wheel bearing worn | 0.61% |
| 39 | Shock absorber worn or leaking | 0.58% |
| 40 | Dashboard warning lamp fault | 0.49% |
| 41 | Parking brake condition | 0.49% |
| 42 | Electronic stability control fault | 0.46% |
| 43 | Seat belt condition | 0.43% |
| 44 | Suspension linkage fault | 0.43% |
| 45 | Brake pedal fault | 0.40% |
| 46 | Flexible brake hose damaged | 0.35% |
| 47 | Steering arm worn | 0.35% |
| 48 | Brake fluid leak | 0.26% |
| 49 | Leaf spring broken or corroded | 0.23% |
| 50 | Steering operation fault | 0.23% |
| 51 | Brake caliper fault | 0.20% |
| 52 | Electrical wiring fault | 0.20% |
| 53 | Steering box fault | 0.20% |
| 54 | Bonnet catch or hinge fault | 0.17% |
| 55 | Chassis condition | 0.17% |
| 56 | Compression ignition emissions above threshold | 0.17% |
| 57 | Steering free play excessive | 0.17% |
| 58 | Brake lever fault | 0.14% |
| 59 | Fuel cap damaged or missing | 0.14% |
| 60 | Exhaust emissions above threshold (non-catalyst) | 0.12% |
| 61 | Outline marker lamp not working | 0.12% |
| 62 | Speedometer fault | 0.12% |
| 63 | Tyre size or type not matched | 0.12% |
| 64 | Tyre valve stem damaged | 0.12% |
| 65 | Brake fluid level low or contaminated | 0.09% |
| 66 | Driver airbag fault | 0.09% |
| 67 | Front passenger door fault | 0.09% |
| 68 | Handbrake cable fault | 0.09% |
| 69 | Handbrake lever fault | 0.09% |
| 70 | Main beam warning light fault | 0.09% |
| 71 | Power steering pipe or hose leaking | 0.09% |
| 72 | Propshaft fault | 0.09% |
| 73 | Rear reflector damaged or missing | 0.09% |
| 74 | Suspension unit fault | 0.09% |
| 75 | Tyre pressure monitoring system fault | 0.09% |
| 76 | Brake cable, rod, lever or linkage fault | 0.06% |
| 77 | Brake master cylinder fault | 0.06% |
| 78 | Engine mounting worn or broken | 0.06% |
| 79 | Engine oil leak | 0.06% |
| 80 | Fuel tank corroded or leaking | 0.06% |
| 81 | Hydraulic fluid leak | 0.06% |
| 82 | Passenger seat fault | 0.06% |
| 83 | Rear fog lamp warning light fault | 0.06% |
| 84 | Steering lock fault | 0.06% |
| 85 | Torsion bar worn or corroded | 0.06% |
| 86 | Vehicle structure corrosion | 0.06% |
| 87 | Steering coupling worn | 0.06% |
| 88 | Anti-roll bar worn or corroded | 0.03% |
| 89 | Body corrosion or damage | 0.03% |
| 90 | Brake fluid warning light on | 0.03% |
| 91 | Brake pedal movement restricted | 0.03% |
| 92 | Brake stationary pin worn | 0.03% |
| 93 | Driver door fault | 0.03% |
| 94 | Driver seat fault | 0.03% |
| 95 | Electrical switch fault | 0.03% |
| 96 | Exhaust leak | 0.03% |
| 97 | Fuel pipe corroded or damaged | 0.03% |
| 98 | Hydraulic brake cylinder fault | 0.03% |
| 99 | Mirror or camera fault | 0.03% |
| 100 | Power steering ram fault | 0.03% |
| 101 | Reversing lamp not working | 0.03% |
| 102 | Seat belt anchorage fault | 0.03% |
| 103 | Steering column fault | 0.03% |
| 104 | Steering wheel damaged or insecure | 0.03% |
| 105 | Suspension arm worn or corroded | 0.03% |
| 106 | Undertray damaged or missing | 0.03% |
| 107 | Universal joint worn | 0.03% |
| 108 | Speed limiter fault | 0.03% |
| 109 | Suspension mounting corroded | 0.03% |
| 110 | Towbar fault | 0.03% |
Showing all 110 reasons — scroll inside the table for the full list.
Hummer MOT Failures by Category
Total MOT failure occurrences for Hummer, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Hummer problems?
Based on analysis of 7K Hummer MOT tests from DVSA data, Hummer has 2 identified common problems across 3 models. The Hummer H3 has the most recorded problems. Electrical issues are the most common category.
Which Hummer model has the most problems?
By total identified common problems, the Hummer H3 has the highest count with 2 problems. This is partly because it is one of the more popular Hummer models on UK roads. See the models grid for a full breakdown.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
Can I report a problem with my Hummer?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Hummer owners spot problems early. We review all submissions before they are published.
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