Peugeot RCZ 1.6 THP 200 T75

The EP6CDTX shares the Prince engine's timing chain weakness, though it is less commonly reported on the 200 hp variant than on the 156 hp (EP6CDT). Pre-November 2011 engines used a tensioner with a soft seal ring that allowed oil pressure to bleed off overnight, producing a distinctive rattle on cold start lasting 1-30 seconds. If ignored, the chain can skip teeth and cause catastrophic valve-to-piston contact. PSA introduced an updated tensioner in late 2011 that significantly reduced failure rates. The plastic chain guides can also disintegrate over time, contaminating the oil system. Replacement involves chain, guides, tensioner, and VVT sprockets. An independent specialist charges around €700-1,200 (parts are approximately €130-200, labor 4-5 hours), while Peugeot dealers quote €1,500-2,000. Typically occurs between 80,000-130,000 km. Frequent oil changes with quality 5W-30 oil are the single most effective preventive measure. Post-2011 cars with the updated tensioner are notably safer purchases.

The HPFP is a well-documented weak point across all Prince THP engines, including the EP6CDTX. The pump contains a hydraulic diaphragm with a small oil reservoir that depletes over time as sludge accumulates. Symptoms include intermittent stuttering under boost, difficulty with hot restarts, rough idle, and fault code P0087. Typically fails between 60,000-120,000 km. A specialist refurbishment costs around €150-200 and delivers excellent long-term durability. A new genuine pump runs €400-600, bringing the total repair to €250-500 at an independent garage or up to €1,000 at a Peugeot dealer. Short-trip urban driving accelerates pump degradation. Using premium 98 octane fuel helps keep the fuel system cleaner.

As with all direct-injection engines, fuel does not wash over the intake valves, allowing carbon deposits from PCV oil vapors to accumulate. The EP6CDTX with its dual VVT system and variable valve lift is particularly susceptible because the valvetronic mechanism creates additional oil vapor paths. Symptoms develop gradually: rough idle, misfires, reduced throttle response, and noticeable power loss. The problem typically becomes apparent between 50,000-80,000 km. Walnut blasting is the most effective cleaning method, costing €400-600 at a specialist (some independent quotes reach €500-700 including intake manifold removal). The buildup will recur every 40,000-60,000 km. Regular spirited driving at higher RPMs helps slow the accumulation. Some owners fit oil catch cans to reduce the amount of oil vapor reaching the intake.

The RCZ 200 uses a shorter-ratio six-speed manual gearbox designed for more spirited driving, which places additional stress on the clutch assembly and dual mass flywheel. Forum reports indicate clutch problems typically appear between 80,000-120,000 km, particularly when the car is driven enthusiastically. Symptoms include juddering from standstill, a high clutch bite point, and occasionally a burning smell under load. A clutch kit replacement (disc, pressure plate, release bearing, slave cylinder) costs approximately €400-600 in parts, with labor of 5-6 hours. If the dual mass flywheel also needs replacement, parts cost rises by €300-500. Total repair at an independent ranges from €800-1,200, while Peugeot dealers quote €1,400-1,800. The slave cylinder should be replaced at the same time to avoid revisiting the job.

The EP6CDTX uses a larger KKK turbocharger than the 156 hp variant, which generates more heat. Two failure modes are documented on RCZ forums. First, the turbine housing material can crack after prolonged heat cycling, particularly on cars driven hard then immediately switched off without a cool-down period. Second, the factory oil feed pipe uses an O-ring that degrades from repeated heat exposure, causing oil to leak onto the turbo and exhaust manifold. The oil feed pipe is a labor-intensive replacement (catalytic converter and turbo must be removed). An upgraded stainless steel braided oil feed line costs around €80-150 and is strongly recommended as preventive maintenance. If the turbo itself fails, a remanufactured unit costs €500-800; a new genuine turbo runs €1,000-1,500. Typically occurs after 100,000-150,000 km for the turbo housing, while the oil feed pipe can leak earlier.

The EP6 engine uses a plastic thermostat housing that becomes brittle from heat cycling. Micro-cracks develop and allow coolant to weep, typically from the bypass pipe connection. The thermostat is electronically assisted; its failure can cause the engine to run too cool (poor cabin heating, common complaint on 2012+ models) or too hot (overheating risk). PSA released a revised thermostat housing part. Replacement costs €250-400 at an independent garage or €400-600 at a Peugeot dealer. If coolant loss goes undetected and the engine overheats, head gasket damage can result in bills exceeding €2,000. Typically appears between 70,000-120,000 km. Check coolant level regularly and investigate any sweet smell from the engine bay.

The RCZ's distinctive aluminium double-bubble roof relies on rubber seals where the glass meets the metal structure. These seals harden and shrink with age, particularly on cars parked outdoors. Water enters through deteriorated seals and drains into the footwells or boot. Multiple entry points are possible: roof seal, window seals, and blocked drainage tubes. Applying silicone sealant at either end of the hollow seals is a common DIY fix (€50-100 in materials). If the seals need full replacement, expect €500-800 including specialist labor. Regular application of rubber conditioner and silicone grease helps extend seal life. Cars stored in a garage fare much better. This is an age-related issue affecting nearly all RCZs over 10 years old to some degree.

A worn-out window control motor is a fairly common issue on the RCZ. Symptoms include erratic window speed, clunking or grinding noises from inside the door panel, and eventually complete failure to operate. The driver's side typically fails first due to more frequent use. A replacement motor costs approximately €150-250 (sourced from Peugeot 308 which uses the same part), with 1-2 hours of labor for installation. Second-hand replacement units from breakers are available for around €100-150. Total repair cost at an independent ranges from €200-350, while dealer quotes can reach €400-450.