Alfa Romeo 156 (2003)
2003 Alfa Romeo 156
CarHunch analysed 4,413 real MOT records for the 2003 Alfa Romeo 156.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2003 Alfa Romeo 156 is significantly less reliable than the UK average, with a first-time pass rate of just 69.3% against the national 80%, and a worrying 29.6% of these cars have recorded dangerous defects at some point—a red flag for safety-critical issues. Petrol models fare slightly better at 70.2% pass rate versus diesel at 67.5%, but both are below par.
At a median mileage of 65,745 for a 21-year-old car, these vehicles are running relatively low, yet they're still averaging 4.36 failures and 16.6 advisories per test, indicating systemic wear rather than just high-mileage degradation. If you're considering one, budget for regular mechanical work and get a full pre-purchase inspection from an Alfa specialist, particularly scrutinising the suspension, cooling system, and electrical components where these cars commonly fail.
The 2003 Alfa Romeo 156 has a below-average first-time pass rate (69.3% vs ~80% UK average) — check the specific vehicle's full MOT history carefully before buying.
These stats describe 4,413 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.
What tends to go wrong
Across 4,413 vehicles — figures show how many had each issue flagged at least once in their MOT history.
Data covers a 3-year window centred on 2003.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 4,413 Alfa Romeo 156 cars.
Petrol vs Diesel
Pass rate difference of 2.7 percentage points — worth knowing if you're choosing between the two.
Before you buy a 2003 Alfa Romeo 156
Based on MOT data from 4,413 vehicles — here's what to check.
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Check the full MOT history.
29.6% 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. -
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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
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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
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (68%) | 3,012 | 70.2% | 4.19 |
| Diesel (32%) | 1,398 | 67.5% | 4.73 |
Colour Breakdown
Based on 48,311 Alfa Romeo 156 vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2003 Alfa Romeo 156 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.
Half of all 2003 Alfa Romeo 156 vehicles fall between 50,559 and 82,053 miles.
2003 Alfa Romeo 156 — Still on the Road
Numbers are thinning — 8% of 2003 Alfa Romeo 156s are still active.
Numbers are declining — 188 vehicles still getting MOTs in 2025 (8% 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
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Compare with another model
See how the 2003 Alfa Romeo 156 stacks up against a rival.