Should I check the MOT history before buying a 1999 Audi S4?

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 1999 Audi S4?

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 1999 Audi S4?

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.

How many 1999 Audi S4 vehicles have had dangerous defects recorded?

34% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 1999 Audi S4 reliable?

Based on MOT data from 161 vehicles, the 1999 Audi S4 has a first-time MOT pass rate of 73%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 1999 Audi S4?

The most frequently recorded MOT issues on the 1999 Audi S4 are: Nearside Front Tyre worn close to the legal limit (56.5% of vehicles), Nearside Rear Tyre worn close to the legal limit (51.2% of vehicles), Offside Front Tyre worn close to the legal limit (51.2% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 1999 Audi S4?

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 S4 (1999)

161 real MOT outcomes analysed • 73% first-time pass rate

1999 Audi S4

CarHunch analysed 161 real MOT records for the 1999 Audi S4. 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 Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Compare Models

The 1999 Audi S4 passes its MOT first time in only 72.5% of cases, well below the UK average of 80%, and over a third of these cars (34.2%) have recorded a dangerous defect at some point—a significant reliability red flag for any buyer. With an average of 4.49 failures per vehicle, owners should expect substantive repair bills, not just minor fixes.

These cars are running at around 120,000 miles on average, which is high for a 25-year-old model and explains some of the wear, but the real concern is the 19.3 advisories per test—indicating widespread minor deterioration across multiple systems. Before buying, have a pre-purchase inspection focus on the cooling system, suspension geometry, and electrical components, as this generation's age and mileage pattern suggest cumulative decay rather than isolated problems.

We have limited data for the 1999 Audi S4 — treat the figures below as indicative rather than definitive.

⚠️ Over 1 in 5 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

73%

UK average ~80%

Below average

Dangerous (ever)

34.2%

At least once in MOT history

Check this vehicle

Avg failures / car

4.49

Over 16.3 tests on record

High

Typical mileage

120k

Middle half: 96k–147k

For context

These stats describe 161 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

What tends to go wrong

Across 161 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 56.5%

Nearside Front Tyre worn close to the legal limit · Nearside Rear Tyre worn close to the legal limit · Offside Front Tyre worn close to the legal limit · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Other issues 36.8%

Oil leak · Oil leak, but not excessive · Windscreen has damage to an area less than a 40mm circle outside zone 'A' · …

Brake wear 33.5%

Nearside Front Brake hose slightly deteriorated · Offside Front Brake hose slightly deteriorated · Front brake disc worn, pitted or scored, but not seriously weakened · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Lighting 33.2%

Nearside Front position lamp(s) not working · Offside Front position lamp(s) not working

Usually cheap to fix. Worth confirming all lights work before collecting.

Exhaust & emissions 19.9%

Exhaust emissions carbon monoxide content after 2nd fast idle excessive

Data covers a 3-year window centred on 1999.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 161 Audi S4 cars.

Before you buy a 1999 Audi S4

Based on MOT data from 161 vehicles — here's what to check.

📋 Check the full MOT history. 34.2% 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
Petrol (99%)	160	73%	4.47

Mileage Distribution

Most 1999 Audi S4 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.

119,893

typical

96,287

low mileage

147,161

high mileage

Half of all 1999 Audi S4 vehicles fall between 96,287 and 147,161 miles.

Is the mileage you're seeing normal?

✓ Under 96,287 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.

✓ 96,287–147,161 miles — normal for age. This is where most 1999 Audi S4s sit.

⚠ Over 198,667 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1999 Audi S4 — Still on the Road

Numbers are thinning — 38% of 1999 Audi S4s are still active.

Numbers are declining — 40 vehicles still getting MOTs in 2025 (38% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* 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

16.3

Avg MOT tests per vehicle

4.49

Avg failures per vehicle

19.3

Avg advisories per vehicle

Other model years — Audi S4: All S4 years → Which year to buy? →

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Buyer beware — pass it on