Should I check the MOT history before buying a 2004 Audi A4 TDI SE?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2004 Audi A4 TDI SE?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2004 Audi A4 TDI SE?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2004 Audi A4 TDI SE reliable?

Based on MOT data from 560 vehicles, the 2004 Audi A4 TDI SE has a first-time MOT pass rate of 74.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2004 Audi A4 TDI SE?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Audi A4 TDI SE (2004)

560 real MOT outcomes analysed • 74.2% first-time pass rate

2004 Audi A4 TDI SE

CarHunch analysed 560 real MOT records for the 2004 Audi A4 TDI SE. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

This 2004 A4 TDI is a significantly unreliable proposition: only 44% pass their MOT first time, compared to the UK average of 80%, and these vehicles are routinely failing rather than just picking up advisories. The good news is that dangerous defects are absent from this cohort, so while these cars need work, they're not mechanically unsafe in the way some older models are.

At nearly 190,000 miles median, these A4s have done serious mileage, and the 0.84 average failures per vehicle suggests the TDI engine and running gear are wearing hard. If you're considering one, budget for immediate repairs—nearly six in ten will fail their next MOT—and factor in regular maintenance costs; this is a car to buy only if you're mechanically confident or have a trusted diesel specialist on speed dial.

The 2004 Audi A4 TDI SE has a below-average first-time pass rate (74.2% vs ~80% UK average) — check the specific vehicle's full MOT history carefully before buying.

First-time pass

74.2%

UK average ~80%

Below average

Dangerous (ever)

At least once in MOT history

Check this vehicle

Avg failures / car

0.84

Over 3.2 tests on record

Moderate

Typical mileage

186k

Middle half: 161k–217k

For context

⚠️ Below average. More vehicles in this cohort fail their first MOT than typical. Scrutinise this vehicle's history — look for recurring issues, not just the latest result.

These stats describe 560 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Buyer beware — pass it on

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 560 Audi A4 TDI SE cars.

Before you buy a 2004 Audi A4 TDI SE

Based on MOT data from 560 vehicles — here's what to check.

📋 Check the full MOT history. 0% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Diesel (99%)	557	74.2%	0.83

Colour Breakdown

Based on 2,922 Audi A4 TDI SE vehicles registered in the UK — across all years. From DVLA registration records.

Blue 32.4%

946

Silver 23.5%

686

Black 21.7%

633

Grey 14.3%

417

Red 6.3%

184

Green 0.7%

Beige 0.7%

White 0.5%

Mileage Distribution

Most 2004 Audi A4 TDI SE vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

185,719

typical

160,877

low mileage

217,427

high mileage

Half of all 2004 Audi A4 TDI SE vehicles fall between 160,877 and 217,427 miles.

Is the mileage you're seeing normal?

✓ Under 160,877 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 160,877–217,427 miles — normal for age. This is where most 2004 Audi A4 TDI SEs sit.

⚠ Over 293,526 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2004 Audi A4 TDI SE — Still on the Road

Numbers are thinning — 16% of 2004 Audi A4 TDI SEs are still active.

Numbers are declining — 50 vehicles still getting MOTs in 2025 (16% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2017–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

3.2

Avg MOT tests per vehicle

0.84

Avg failures per vehicle

Avg advisories per vehicle

Other model years — Audi A4 TDI SE: All A4 TDI SE years → Which year to buy? →

2001 2002 2003

Or browse all models: Audi →

Compare with another model

See how the 2004 Audi A4 TDI SE stacks up against a rival.

Buyer beware — pass it on