1990 Mercedes 609 MOT Pass Rate
Pass rate for 609 models manufactured in 1990, based on 85 real MOT test results.
Data from official DVSA MOT testing records
1990 Mercedes 609 MOT Analysis
The 1990 Mercedes 609 has an MOT pass rate of 67.1% based on 85 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 140,967 miles on the odometer. With a 32.9% failure rate, the 1990 609 is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1990 Mercedes 609 is Steering, responsible for 3.5% of failures. Steering failures include excessive play in the steering wheel, leaking power steering fluid, worn track rod ends, and damaged steering rack. These affect vehicle control and are closely related to suspension wear. Typical repair costs range from £150–600. Body, chassis, structure is the second most common issue at 2.4%. Lamps, reflectors and electrical equipment follows at 1.2%.
Top failures specific to 1990 models only. The overall 609 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 | Steering | 3.5% | 3 |
| 2 | Body, Chassis, Structure | 2.4% | 2 |
| 3 | Lamps, Reflectors And Electrical Equipment | 1.2% | 1 |
| 4 | Noise, Emissions And Leaks | 1.2% | 1 |
| 5 | Brakes | 1.2% | 1 |
Failures per 10,000 Miles
avg. 140,967 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 |
|---|---|---|---|
| Steering | 0.25 | 3.5% | 3 |
| Body & Structure | 0.17 | 2.4% | 2 |
| Lamps & Electrical | 0.08 | 1.2% | 1 |
| Noise, emissions and leaks | 0.08 | 1.2% | 1 |
| Brakes | 0.08 | 1.2% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1990 Mercedes 609 has an MOT pass rate of 67.1% based on 85 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 140,967 miles on the odometer. With a 32.9% failure rate, the 1990 609 is rated as "Good" for MOT reliability.
If you own or are considering buying a 1990 Mercedes 609, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to steering: Check for excessive steering wheel play (more than a few inches of free movement). Listen for whining from the power steering pump. Look for fluid leaks under the car near the front wheels. With an average mileage of 140,967 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Steering — 3.5% of failures
Steering issues account for 3.5% of MOT failures on 1990 Mercedes 609 models. Steering failures include excessive play in the steering wheel, leaking power steering fluid, worn track rod ends, and damaged steering rack. These affect vehicle control and are closely related to suspension wear. Typical repair costs: £150–600. Pre-MOT check: Check for excessive steering wheel play (more than a few inches of free movement). Listen for whining from the power steering pump. Look for fluid leaks under the car near the front wheels.
Body, chassis, structure — 2.4% of failures
Body, chassis, structure issues account for 2.4% of MOT failures on 1990 Mercedes 609 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.
Lamps, reflectors and electrical equipment — 1.2% of failures
Lamps, reflectors and electrical equipment issues account for 1.2% of MOT failures on 1990 Mercedes 609 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.