Citroen C4 Sx HDI (2006)
2006 Citroen C4 Sx HDI
CarHunch analysed 148 real MOT records for the 2006 Citroen C4 Sx HDI. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2006 C4 HDI is a genuine reliability concern: it passes MOT first time only 64.3% of the time, significantly below the UK average of 80%, which means a coin-flip chance of unexpected repairs on test day. The lack of dangerous defects is a small mercy, but the 0.63 average failures per vehicle and distinctly low CarHunch score of 60 suggest chronic niggling issues rather than catastrophic ones.
At 140,555 miles median mileage for an 18-year-old car, these diesels are running high but not unusually so, and the near-zero advisories indicate that when problems do emerge, they're failing outright rather than giving warning signs. If you're considering this model, budget for regular garage visits and factor in a pre-purchase inspection by a diesel specialist—the failure pattern suggests electrics, turbos, or fuel system wear are likely culprits.
What to check before buying a 2006 Citroen C4 Sx HDI
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.
- 📄 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 Citroen C4 Sx HDI
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2006 Citroen C4 Sx HDI 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 2006 Citroen C4 Sx HDI vehicles fall between 115,714 and 161,873 miles.
2006 Citroen C4 Sx HDI — Still on the Road
Numbers are declining — 11 vehicles still getting MOTs in 2025 (10% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2017–2025.
MOT History Averages
Found a specific Citroen C4 Sx HDI?
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