2015 Citroen C4 1.6L Diesel · FH15 MJU

The 1.6-litre HDi diesel in the C4 typically returns around 55-65 mpg on a mix of runs, making it economical for commuting and motorway use. Road tax falls into a reasonable band for a 2015 diesel of this engine size, though you should check current pricing as post-2017 rules apply surcharges for diesel vehicles. Insurance is generally modest for the C4, often sitting in groups 15-22 depending on trim. Annual maintenance on a C4 of this age is moderate, with parts being relatively affordable, though diesel-specific items such as clutch, DMF (dual-mass flywheel) and EGR valve work can be costlier if needed. Estimated annual running costs including fuel, tax, insurance and routine maintenance would typically fall in the £1,400-£1,800 range.

Closely inspect the front and rear brake discs for lipping, scoring and minimum thickness, as both were flagged as worn on the 2026 test at 56,748 miles. Examine all four tyres for uneven wear patterns — particularly the inner and outer edges — given the multiple edge-wear advisories recorded in 2023, which may suggest tracking, suspension bush wear or worn shock absorbers. The 1.6 HDi diesel is known for potential issues with the EGR valve, turbo actuator and dual-mass flywheel, so a thorough test drive including warm and cold running, plus a diagnostic scan for stored fault codes, is advisable.