Peugeot 107 PN

PSA entry-level diesel (1.4L HDi, 50 kW) with common-rail injection and timing chain. Frugal and fundamentally reliable, but with a well-known KP35 turbo issue: the oil feed line to the turbocharger clogs with soot deposits in the oil, and the banjo bolt with its filter screen (037649) blocks up. Injectors seize due to copper seal wear. With regular oil changes and long-distance driving, this engine lasts well.

• !! Injectors seized in the cylinder head from 150,000 km

  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
  450–2,200 $
  Ad Siemens VDO fuel injector DV4fuel injector 1.4 HDi9663429280
• !! Turbo failure from clogged oil feed from 130,000 km

  The oil feed line to the KP35 turbo clogs with soot deposits. The banjo bolt with integrated mesh filter (PSA 037649) blocks and cuts off lubrication. The turbo overheats and bearing shells are destroyed.

  Symptoms: Whining noise from turbo, dropping boost pressure, blue smoke from exhaust, engine warning light.
  600–1,800 $
  Ad KP35 54359700009 turbocharger DV40375G9 turbo Peugeot 1.4 HDi037649 banjo bolt oil feed turbo
• !! EGR valve soots up and jams from 100,000 km

  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
  250–600 $
  Ad EGR valve 1.4 HDiEGR DV4TD9660276280

+ 5 more engine weaknesses + vehicle weaknesses

Toyota three-cylinder (1.0L, 50 kW) with timing chain — identical to the Toyota Aygo and Citroën C1. Extremely reliable and fuel-efficient with virtually no known weak spots. The chain drive is maintenance-free with proper oil changes. The only item to watch is valve clearance adjustment every 100,000 km (solid tappets). One of the most durable engines in its class — 300,000 km has been documented in practice.

• !! ECU failed — no-start and limp mode from 100,000 km

  The engine control unit on the 1KR-FE in the Peugeot 107 fails more often than on other engines. Consequences include no-start, limp mode or running on only three cylinders. Repair of the original ECU is possible and saves up to 80% versus a new unit. New unit cost: 1,000–2,000 Euro.

  Symptoms: Engine won't start or starts poorly, runs on three cylinders, warning lights on, vehicle enters limp mode
  250–2,000 $
  Ad Motorcontrol unit Peugeot 107 1KR-FE repairECU 1.0 Peugeot 107 C1 Toyota Aygo
• !! Timing chain stretch from 100,000 km from 100,000 km

  The timing chain of the 1KR-FE tends to stretch from around 100,000 km. The chain tensioner can no longer compensate for the wear, leading to a ticking noise and shifted valve timing.

  Symptoms: Ticking/rattling on cold start, rough idle, slight power loss
  400–900 $
  Ad timing chain 1KR-FEtiming chain kit Peugeot 107 1.0
• !! Weak clutch — all pre-2009 model years from 70,000 km

  All pre-2009 models have a weak clutch. From the 2009 facelift, the reinforced clutch from the Yaris was fitted. The clutch needs regular adjustment via cable.

  Symptoms: Clutch slips, pedal engages very high, frequent adjustment needed, squealing
  300–600 $
  Ad clutchskit 1KR-FE 1.0 Peugeot 107 Yarisclutch verstärkt Toyota Aygo C1 107 ab 2009

+ 3 more engine weaknesses + vehicle weaknesses