Should I check the MOT history before buying a 2004 Alfa Romeo 166?

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 Alfa Romeo 166?

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 Alfa Romeo 166?

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 2004 Alfa Romeo 166 vehicles have had dangerous defects recorded?

45% 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 2004 Alfa Romeo 166 reliable?

Based on MOT data from 110 vehicles, the 2004 Alfa Romeo 166 has a first-time MOT pass rate of 70.7%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2004 Alfa Romeo 166?

The most frequently recorded MOT issues on the 2004 Alfa Romeo 166 are: Offside Front Tyre worn close to the legal limit (73.8% of vehicles), Parking brake: efficiency below requirements (71.5% of vehicles), Nearside Front Tyre worn close to the legal limit (67.3% 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 2004 Alfa Romeo 166?

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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Alfa Romeo 166 (2004)

110 real MOT outcomes analysed • 70.7% first-time pass rate

2004 Alfa Romeo 166

CarHunch analysed 110 real MOT records for the 2004 Alfa Romeo 166. 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 2004 Alfa Romeo 166 passes its first MOT attempt only 70.7% of the time, significantly below the UK average of 80%, and nearly half of these cars have experienced a dangerous defect at some point — a genuinely concerning figure for a potential buyer. The petrol models show no variation from the overall pass rate, so fuel type isn't a factor here.

With a median mileage of 78,279 miles for a 20-year-old car, these 166s are reasonably well-preserved, yet they're averaging nearly 5 failures and 23 advisories per test, suggesting lingering electrical, trim, and wear issues that accumulate over time. If you're considering one, factor in regular maintenance costs and have a pre-purchase inspection focus on braking systems and suspension — the high dangerous defect rate indicates these areas demand close attention.

We have limited data for the 2004 Alfa Romeo 166 — 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

70.7%

UK average ~80%

Below average

Dangerous (ever)

44.6%

At least once in MOT history

Check this vehicle

Avg failures / car

4.9

Over 15.8 tests on record

High

Typical mileage

78k

Middle half: 62k–97k

For context

These stats describe 110 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 110 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 73.8%

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

Brake wear 71.5%

Parking brake: efficiency below requirements · Rear Brake pad(s) wearing thin · Nearside Front Brake pipe slightly corroded · …

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

Other issues 42.5%

Under-trays fitted obscuring some underside components · Oil leak, but not excessive · Engine covers fitted obscuring some components in the engine bay

Lighting 19.6%

Nearside Front position lamp(s) not working

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

Data covers a 3-year window centred on 2004.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 110 Alfa Romeo 166 cars.

Before you buy a 2004 Alfa Romeo 166

Based on MOT data from 110 vehicles — here's what to check.

📋 Check the full MOT history. 44.6% 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 (95%)	104	70.8%	5.1

Mileage Distribution

Most 2004 Alfa Romeo 166 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.

78,279

typical

61,803

low mileage

97,132

high mileage

Half of all 2004 Alfa Romeo 166 vehicles fall between 61,803 and 97,132 miles.

Is the mileage you're seeing normal?

✓ Under 61,803 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.

✓ 61,803–97,132 miles — normal for age. This is where most 2004 Alfa Romeo 166s sit.

⚠ Over 131,128 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2004 Alfa Romeo 166 — Still on the Road

Numbers are thinning — 36% of 2004 Alfa Romeo 166s are still active.

Numbers are declining — 25 vehicles still getting MOTs in 2025 (36% 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

15.8

Avg MOT tests per vehicle

4.9

Avg failures per vehicle

Avg advisories per vehicle

Other model years — Alfa Romeo 166: All 166 years → Which year to buy? →

1999 2000 2001 2002 2003 2005

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Buyer beware — pass it on