2004 Isuzu Bighorn MOT Pass Rate
Pass rate for Bighorn models manufactured in 2004, based on 163 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Bighorn cars tested in 2004. Want to see how cars built in 2004 hold up over time?
View 2004 Isuzu Bighorn vintage page → (62.9% current pass rate)2004 Isuzu Bighorn MOT Analysis
The 2004 Isuzu Bighorn has an MOT pass rate of 62.0% based on 163 tests — around the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 170,241 miles on the odometer. With a 38.0% failure rate, the 2004 Bighorn is rated as "Average" for MOT reliability.
The leading cause of MOT failure for the 2004 Isuzu Bighorn is Noise, emissions and leaks, responsible for 7.4% of failures. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs range from £100–1,000+. Body, chassis, structure is the second most common issue at 3.1%. Suspension follows at 2.5%.
Top failures specific to 2004 models only. The overall Bighorn page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Noise, Emissions And Leaks | 7.4% | 12 |
| 2 | Body, Chassis, Structure | 3.1% | 5 |
| 3 | Suspension | 2.5% | 4 |
| 4 | Lamps, Reflectors And Electrical Equipment | 2.5% | 4 |
| 5 | Tyres | 1.8% | 3 |
| 6 | Visibility | 1.8% | 3 |
| 7 | Steering | 1.2% | 2 |
| 8 | Identification Of The Vehicle | 1.2% | 2 |
| 9 | Brakes | 1.2% | 2 |
| 10 | Seat Belts And Supplementary Restraint Systems | 0.6% | 1 |
Failures per 10,000 Miles
avg. 170,241 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Noise, emissions and leaks | 0.43 | 7.4% | 12 |
| Body & Structure | 0.18 | 3.1% | 5 |
| Suspension | 0.14 | 2.5% | 4 |
| Lamps & Electrical | 0.14 | 2.5% | 4 |
| Tyres | 0.11 | 1.8% | 3 |
| Visibility | 0.11 | 1.8% | 3 |
| Steering | 0.07 | 1.2% | 2 |
| Identification of the vehicle | 0.07 | 1.2% | 2 |
| Brakes | 0.07 | 1.2% | 2 |
| Seat Belts | 0.04 | 0.6% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2004 Isuzu Bighorn has an MOT pass rate of 62.0% based on 163 tests — around the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 170,241 miles on the odometer. With a 38.0% failure rate, the 2004 Bighorn is rated as "Average" for MOT reliability.
If you own or are considering buying a 2004 Isuzu Bighorn, budget for potential repairs before each MOT. Before your MOT, pay particular attention to noise, emissions and leaks: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help. With an average mileage of 170,241 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Noise, emissions and leaks — 7.4% of failures
Noise, emissions and leaks issues account for 7.4% of MOT failures on 2004 Isuzu Bighorn models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Body, chassis, structure — 3.1% of failures
Body, chassis, structure issues account for 3.1% of MOT failures on 2004 Isuzu Bighorn models. Body and structure failures include excessive corrosion, sharp edges, loose panels, and damage to the vehicle frame. Rust is the primary concern, especially on older vehicles or those exposed to road salt. Typical repair costs: £100–500+. Pre-MOT check: Inspect sills, wheel arches, door bottoms, and the chassis for rust. Surface rust is acceptable but structural corrosion or holes will fail. Check that all doors, bonnet, and boot close securely.
Suspension — 2.5% of failures
Suspension issues account for 2.5% of MOT failures on 2004 Isuzu Bighorn models. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.