Thinking about buying a used Citroen C4 (2004–2018) in New Zealand? We've documented 8 known faults for this model spanning engine, transmission, and suspension. Each researched and verified before it's published. The most serious issues here are rated critical. Two are set out in full below — the rest, with the symptoms, repair costs and checks for each, are free with an account.
8
Documented faults
Critical
Most serious
$900–$3,000
Typical repair
3
Systems covered
Known Citroen C4 faults
Every fault below is documented specifically for this model — researched and verified before it’s published.
011.6 THP Prince Engine Timing Chain Tensioner Failure
CriticalVery commonEngine $2,500–$6,000 to fix
Identical to the fault documented across the entire PSA/BMW Prince EP6 engine family. The plastic primary chain tensioner guide fractures and the chain elongates, risking valve contact at high RPM or during cold starts. Documented across C4 Mk1 and Mk2 variants. The fault prompted a class action lawsuit in France. Oil maintenance history is the primary purchase screening tool.
Symptoms to notice
Cold-start chain rattle, typically fading after warm-up
Check engine light with cam/crank correlation codes P0016 or P0017
Engine misfires or rough running
Sudden engine failure without prior warning if chain jumps
What to check
Cold-start essential — listen for rattle in the first 30 seconds. Verify full synthetic oil used at 10,000 km or less intervals. Scan for cam/crank correlation fault codes. Any C4 THP with unclear or incomplete history should be treated as requiring imminent chain replacement.
Where to look: Front of engine behind timing chain cover
Ask the seller
“Has the timing chain, tensioner, or guides been replaced?”
“Can you show oil service receipts with mileage?”
“Has the engine ever rattled on startup or shown warning lights?”
02Electro-Hydraulic Power Steering Pump Failure
MajorCommonSuspension $900–$2,200 to fix
The C4 uses an electro-hydraulic power steering pump (EHPS) rather than a conventional belt-driven or electric-assist unit. The pump motor wears internally over time and hydraulic seals fail, causing sudden loss of steering assistance. Fluid weeping from pump fittings or the high-pressure hose is a precursor. Failure is often sudden, leaving very heavy steering particularly at low speed.
Symptoms to notice
Steering becomes very heavy, especially at low speed or when parking
Power steering warning light
Whining or groaning noise from under bonnet during steering inputs
Power steering fluid visible on ground or staining engine bay
What to check
Check power steering fluid reservoir for correct level and contamination. Inspect pump body and hose unions for seepage. Turn steering lock-to-lock at low speed and feel for consistent assistance. If a workshop inspection is possible: Check for power steering fault codes with PSA diagnostic tool.
Where to look: Engine bay, electro-hydraulic pump unit typically near front of engine
Ask the seller
“Has the steering ever felt heavy or lost assistance?”
“Any warning lights related to steering?”
“Has the power steering fluid ever been topped up or leaked?”
EngineCritical
EngineMajor
EngineMajor
TransmissionMajor
TransmissionMajor
TransmissionMajor
6 more documented faults on the Citroen C4
Symptoms, what to check, where to look and what to ask the seller — for every fault above. Free with an account, no card needed. One account covers one vehicle, so make it the car you’re actually looking at.
This page covers the model. Enter the plate of the actual car you’re looking at and see its year, engine, safety rating and register flags — free, no account needed.
Like any used car, it depends on the specific example and its service history. Across the 8 documented faults for the Citroen C4, the recurring problem areas are engine, transmission, and suspension. A Citroen C4 with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.
What are the most common problems with a used Citroen C4?
+
We've catalogued 8 known faults for the Citroen C4, covering engine, transmission, and suspension. Two are written out in full on this page. The rest — with the symptoms to notice, what to inspect, and typical repair costs for each — are free once you create an account.
How much do repairs cost on a Citroen C4?
+
Most single repairs on the Citroen C4 fall between $900–$3,000 at NZ independent-workshop rates. Some of the 8 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.
Should I get a pre-purchase inspection on a Citroen C4?
+
Yes. A Citroen C4 inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $17.90 far less than the cost of missing one of the faults on this page.