The first-generation Citroën C4 (internal code LC for the 5-door sedan, LA for the 3-door Coupé) succeeded the Xsara in 2004. It marked a major stylistic and technological break for the chevron brand. Featuring a fixed-hub steering wheel (grouping controls) and digital central instrumentation, it stood out for its originality. Based on PSA's PF2 platform (shared with the Peugeot 307), it offers an excellent comfort/road holding compromise. A restyling (facelift) occurred in late 2008, bringing slight aesthetic touches and, most importantly, the introduction of the 'Prince' petrol engines (VTi and THP) co-developed with BMW. While the C4 I was a commercial success, its reliability is very heterogeneous, particularly for the diesel (HDi) engines, which accounted for the vast majority of sale
The first-generation Citroën C4 is a car full of road qualities, but its reliability record is heavily tarnished by certain engines. If you're looking for a diesel, steer clear of the 1.6 HDi 110 (DV6TED4) unless the turbo, injector seals, and flywheel have been recently replaced with supporting invoices. Without hesitation, opt for the modest but indestructible 1.6 HDi 90, or the powerful and robust 2.0 HDi 136/140 for long journeys. For petrol engines, the older blocks (1.4i, 1.6i, 2.0i) from before 2008 are excellent choices, very reliable and inexpensive to maintain, unlike the post-2008 VTi and THP engines which are true problem magnets (timing chain). Buying a C4 I therefore requires a surgical selection of the engine and a meticulous check of the onboard electronics.