1991 Audi 100 MOT Pass Rate
Pass rate for 100 models manufactured in 1991, based on 1,020 real MOT test results.
Data from official DVSA MOT testing records
This page shows all 100 cars tested in 1991. Want to see how cars built in 1991 hold up over time?
View 1991 Audi 100 vintage page → (84.6% current pass rate)1991 Audi 100 MOT Analysis
The 1991 Audi 100 has an MOT pass rate of 54.4% based on 1,020 tests — below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 135,614 miles on the odometer. With a 45.6% failure rate, the 1991 100 is rated as "Poor" for MOT reliability.
The leading cause of MOT failure for the 1991 Audi 100 is Tyres, responsible for 1.0% of failures. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs range from £50–200 per tyre. Lamps, reflectors and electrical equipment is the second most common issue at 0.8%. Body, chassis, structure follows at 0.4%.
Top failures specific to 1991 models only. The overall 100 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 | Tyres | 1.0% | 10 |
| 2 | Lamps, Reflectors And Electrical Equipment | 0.8% | 8 |
| 3 | Body, Chassis, Structure | 0.4% | 4 |
| 4 | Brakes | 0.4% | 4 |
| 5 | Identification Of The Vehicle | 0.2% | 2 |
| 6 | Noise, Emissions And Leaks | 0.2% | 2 |
| 7 | Suspension | 0.2% | 2 |
| 8 | Non-component Advisories | 0.2% | 2 |
| 9 | Visibility | 0.2% | 2 |
Failures per 10,000 Miles
avg. 135,614 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 |
|---|---|---|---|
| Tyres | 0.07 | 1.0% | 10 |
| Lamps & Electrical | 0.06 | 0.8% | 8 |
| Body & Structure | 0.03 | 0.4% | 4 |
| Brakes | 0.03 | 0.4% | 4 |
| Identification of the vehicle | 0.01 | 0.2% | 2 |
| Noise, emissions and leaks | 0.01 | 0.2% | 2 |
| Suspension | 0.01 | 0.2% | 2 |
| Non-component advisories | 0.01 | 0.2% | 2 |
| Visibility | 0.01 | 0.2% | 2 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1991 Audi 100 has an MOT pass rate of 54.4% based on 1,020 tests — below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 135,614 miles on the odometer. With a 45.6% failure rate, the 1991 100 is rated as "Poor" for MOT reliability.
If you own or are considering buying a 1991 Audi 100, be prepared for above-average maintenance costs. Before your MOT, pay particular attention to tyres: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating. With an average mileage of 135,614 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Tyres — 1.0% of failures
Tyres issues account for 1.0% of MOT failures on 1991 Audi 100 models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Lamps, reflectors and electrical equipment — 0.8% of failures
Lamps, reflectors and electrical equipment issues account for 0.8% of MOT failures on 1991 Audi 100 models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Body, chassis, structure — 0.4% of failures
Body, chassis, structure issues account for 0.4% of MOT failures on 1991 Audi 100 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.