Toyota Avensis T4 D 4d (2004)
2004 Toyota Avensis T4 D 4d
CarHunch analysed 105 real MOT records for the 2004 Toyota Avensis T4 D 4d. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2004 Avensis T4 D-4D is a serious reliability concern—just 38% pass their MOT first time, compared to the UK average of 80%, and the diesel engines show no meaningful advantage at 38% either. There are no dangerous defects on record, which is a positive, but the average of 0.83 failures per vehicle indicates these cars need meaningful work to get through testing.
With a median mileage of 176,590 miles for a 20-year-old car, these are high-use vehicles that have clearly been worked hard, and the lack of any recorded advisories suggests inspectors are finding outright failures rather than emerging problems. If you're considering one, budget for repairs before or immediately after purchase, and have a pre-purchase inspection by a diesel specialist who can assess engine wear and turbo condition—this model simply doesn't age gracefully without serious maintenance.
What to check before buying a 2004 Toyota Avensis T4 D 4d
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Toyota Avensis T4 D 4d
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
CarHunch may earn a small commission if you buy via these links — at no extra cost to you.
Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (99%) | 104 | 38% | 0.83 |
| Gas Bi-Fuel (1%) | 1 | 50% | 1 |
Mileage Distribution
Most 2004 Toyota Avensis T4 D 4d vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2004 Toyota Avensis T4 D 4d vehicles fall between 154,085 and 202,565 miles.
2004 Toyota Avensis T4 D 4d — Still on the Road
Numbers are declining — 13 vehicles still getting MOTs in 2023 (23% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2018–2023.
MOT History Averages
Found a specific Toyota Avensis T4 D 4d?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.