Peugeot 107
PSA entry-level diesel with common rail injection. Economical and reliable, but low on power. Timing chain is maintenance-free.
Diesel in a microcar
54 hp in the 107 is a better match for the weight, but the rough diesel clatter is completely at odds with the city car concept. A rare misfire.
Engine Weaknesses 6
The injectors on the DV4 can seize in the injector bore due to carbon deposits and corrosion, making them impossible to remove without destruction. Forced removal risks damage to the cylinder head.
Symptoms: Increased fuel consumption, rough idle, black or white smoke from exhaust, engine management light, power loss under acceleration
The EGR valve on the DV4 soots up heavily from carbon deposits, particularly during frequent short-trip use. Adaptation after replacement requires PSA diagnostic software (PP2000).
Symptoms: Engine warning light, noticeable power loss, rough engine under part load, elevated emissions, rough idle, fault codes P0409/P0490/P1459
The DPF on the DV4 blocks up during predominantly short-trip use because exhaust temperatures for regeneration are never reached. Ash accumulates and can permanently clog the filter.
Symptoms: DPF blocked warning on instrument cluster, significant power loss, increased fuel consumption, engine enters limp mode, exhaust smell inside the car
Defective thermostat won't open correctly: engine stays below operating temperature in city traffic or overheats. The cooling fan relay/thermostat can also fail. Repair cost 80–250 € including parts.
Symptoms: Temperature gauge fluctuates wildly, engine overheats in city/stationary, cooling fan cycles intermittently
The injector copper seal fails: exhaust gases escape from the combustion chamber, a sticky black deposit forms around the injector. Carbon deposits in the cylinder head are dangerous for the turbo. Repair cost approx. 450–900 €.
Symptoms: Sticky black soot deposit visible around injectors, burnt oil smell, occasional warm-start failure
The oil feed gallery sits too close to the outer edge: the head gasket tends to leak on the timing side. Symptoms similar to the TU engine. Worth addressing during a timing belt change.
Symptoms: Oil film on the front timing side, slight oil loss, oil smell from the engine bay
Vehicle Weaknesses 7
Aging door and boot seals along with blocked condensate drain channels lead to water ingress in the footwells and boot. A well-known issue on older examples, promoting mould growth and electronics damage.
The water pump on the 1KR-FE three-cylinder can start leaking from around 50,000 km, causing a slow coolant loss. Ignoring it risks overheating damage.
Sills rust under the trim on older 107 models; the actual extent is often much greater than visible. Wheel arches and underbody also affected. Repair is costly because the metal is thin.
Front strut top mounts and shock absorbers wear noticeably with frequent city use. Rubber bushes and track rod ends are also typical wear items.
The downstream lambda sensor frequently fails, triggering the engine warning light with fault code P0420. Mainly affects older vehicles from around 100,000 km.
The battery on the Peugeot 107 discharges quickly with frequent short journeys. Idle speed control valve problems can contribute to discharge. The alternator fails at higher mileages.
Door check straps break frequently because Peugeot uses low-quality items. The failure can cause cracks in the sheet metal mount. Replacement requires removing the door trim panel. Replacement part around 30–50 euros.
