Porsche Boxster (2003)
2003 Porsche Boxster
CarHunch analysed 3,615 real MOT records for the 2003 Porsche Boxster. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2003 Porsche Boxster passes its MOT at 80.9%, fractionally above the UK average, but the headline concern is that one in three have recorded a dangerous defect at some point—well above the typical threshold and a serious red flag for potential buyers. This suggests structural, brake, or steering issues are more common than you'd expect in a sports car of this age.
At nearly 57,400 miles median, these Boxsters are relatively low-mileage for 21-year-old cars, which is a positive sign of careful ownership. However, the average vehicle racks up nearly 4 failures and 21 advisories per test, indicating wear-related problems accumulate steadily; get a full pre-purchase inspection focusing on suspension, exhaust systems, and brake condition before committing.
What to check before buying a 2003 Porsche Boxster
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.
- ⚠️ 33.2% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 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 Porsche Boxster
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 3,570 | 80.9% | 3.97 |
| Other (1%) | 44 | 84.5% | 0.8 |
| LPG (0%) | 1 | 71.4% | 6 |
Mileage Distribution
Most 2003 Porsche Boxster 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 2003 Porsche Boxster vehicles fall between 41,952 and 73,807 miles.
2003 Porsche Boxster — Still on the Road
2,246 vehicles still getting MOTs in 2025 — 75% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Most Common MOT Issues — 2003 Porsche Boxster
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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85.1%
Nearside Rear Tyre worn close to the legal limit
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84.2%
Offside Rear Tyre worn close to the legal limit
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54.9%
Under-trays fitted obscuring some underside components
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52.9%
Nearside Front Tyre worn close to the legal limit
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51.5%
Offside Front Tyre worn close to the legal limit
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38.1%
Oil leak, but not excessive
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33.8%
Offside Front Brake pipe corroded, covered in grease or other material
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31.2%
Offside Front Brake pipe slightly corroded
Data covers a 3-year window centred on 2003. Counts include advisories and failures.
Found a specific Porsche Boxster?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.