Peugeot 407 D2

Most widespread PSA diesel. Went through many evolution stages from Euro 4 to Euro 6. Economical and long-lived with regular servicing. Prone to DPF issues in short-trip operation.

• !! Turbocharger total failure from oil sludge from 100,000 km

  The 1.6 HDi is notorious for repeated turbocharger failures. Soot particles in the oil alter viscosity, oil lines coke up and the turbocharger runs dry. A second failure after replacement without addressing the root cause is common.

  Symptoms: Whistling from the turbocharger, severe power loss, blue or black exhaust smoke, oil leaking from turbo, engine enters limp mode
  700–2,000 $
  Ad turbocharger 1.6 HDi 9HZGarrett GT1544V0375J6Turbo Ölzuleitung DV6
• !! Leaking injectors with diesel in the engine oil from 120,000 km

  The copper sealing rings on the injectors wear out, allowing combustion gases and diesel to enter the cylinder head. Oil dilution by diesel can lead to engine damage. Affects all 1.6 HDi variants.

  Symptoms: Diesel smell at the dipstick, rising oil level, black deposits around injectors, rough engine running, hissing noises at the cylinder head with engine running
  300–800 $
  Ad fuel injector Kupferdichtring 1.6 HDifuel injectorgasket DV6fuel injector Hülse 1.6 HDi
• !! Premature camshaft and chain wear from 130,000 km

  The cam-to-cam timing chain between inlet and exhaust camshafts can stretch or snap. Hydraulic chain tensioners fail, causing valve timing shift and in extreme cases engine damage.

  Symptoms: Rattling on cold start, rough engine running, engine management light, power loss, in extreme cases sudden engine shutdown from chain snap
  800–2,500 $
  Ad timing chain DV6camshaft 1.6 HDichain tensioner 9HZ

+ 3 more engine weaknesses + vehicle weaknesses

Powerful PSA diesel for mid-size and SUV applications. Common rail with turbo. Later versions as BlueHDi with SCR cat and AdBlue.

• !! Timing belt snap caused by defective water pump from 90,000 km

  The plastic impeller of the water pump can disintegrate from as early as 50,000 km. Fragments enter the timing belt drive and cause the belt to snap with subsequent total engine destruction.

  Symptoms: Coolant temperature rises unusually, coolant loss without visible leak, faint grinding or squealing from the timing belt drive, sudden engine shutdown when belt snaps
  500–900 $
  Ad timing belt kit DW10 water pumpSKF VKMC 03259water pump 2.0 HDi
• !! Dual-mass flywheel wear from 130,000 km

  The dual-mass flywheel wears prematurely, especially on the 107 hp variant. Oil dilution from DPF regeneration accelerates wear. The clutch should always be renewed at the same time.

  Symptoms: Squealing or clattering when starting and stopping the engine, pronounced vibrations at idle, juddering when pulling away, knocking at low revs under load
  1,000–1,800 $
  Ad dual-mass flywheel 2.0 HDiLUK ZMS DW10Sachs ZMS Peugeot 307 2.0 HDi
• !! Leaking injectors causing oil dilution from 140,000 km

  Leaking injectors allow diesel into the engine oil, drastically reducing its lubricity. The rising oil level is often overlooked. This can cause piston and bearing damage.

  Symptoms: Diesel smell at the dipstick, oil level rises above maximum, strong exhaust smell inside the car, engine judders or knocks more than usual, increased fuel consumption
  400–1,500 $
  Ad fuel injector gasket DW10fuel injector 2.0 HDi BoschKupferdichtring fuel injector DW10

+ 4 more engine weaknesses + vehicle weaknesses

Top-of-the-range PSA diesel family unit. Powerful and comfortable, but rare on the used car market. More involved servicing than smaller HDi units.

• !! Turbocharger bearing damage from oil starvation from 150,000 km

  The turbocharger bearings of the DW12 wear when oil quality is poor or change intervals are extended. Carbon deposits in the oil line block lubricant supply and cause turbo damage.

  Symptoms: Whistling from the turbo, blue smoke under acceleration, noticeable power loss, rising oil consumption
  800–2,000 $
  Ad turbocharger DW12 2.2 HDiturbo 407 2.2 HDiGarrett GT1549S
• !! Injectors seized in the cylinder head from 130,000 km

  Moisture accumulation in the injector bores causes the injectors to corrode into the cylinder head. Removal requires special tools and can result in consequential damage to the cylinder head.

  Symptoms: Rough engine running, increased fuel consumption, engine knocking, black smoke
  600–2,500 $
  Ad fuel injector DW12 2.2 HDifuel injector 407 2.2Bosch 0445110036
• !! EGR valve sticks from 100,000 km

  The EGR valve on the DW12 tends to stick from soot deposits, particularly during predominantly short-trip use. The mechanism gets stuck in the open or closed position and disrupts mixture preparation.

  Symptoms: Rough engine running, power loss, engine management light, hesitation under acceleration
  300–800 $
  Ad EGR valve DW12EGR valve 2.2 HDiPeugeot 407 EGR

+ 3 more engine weaknesses + vehicle weaknesses

Bi-turbo V6 diesel with 204 hp, co-developed with Ford (also found in Jaguar/Land Rover). Smooth and powerful, but complex and maintenance-intensive.

• !! Biturbo bearing damage from oil coking from 100,000 km

  The two turbochargers of the V6 HDi are extremely sensitive to oil deposits in the lubrication circuit. Coked oil destroys the turbo bearings and leads to high oil consumption. Left untreated, catastrophic engine damage follows.

  Symptoms: Loud turbo whistling, blue smoke under throttle, significant power loss, oil level drops quickly
  2,000–5,000 $
  Ad turbocharger 2.7 V6 HDiturbo DT17 407 CoupéGarrett biturbo 2.7 HDi
• !! EGR valves fail frequently from 80,000 km

  The EGR valves on the V6 engine fail regularly from soot coking. As a V6 with two cylinder banks there are two EGR valves, which doubles the probability of failure and repair costs.

  Symptoms: Engine management light, power loss, black smoke, rough idle, increased fuel consumption
  500–1,500 $
  Ad EGR valve 2.7 V6 HDiEGR valve DT17EGR 407 Coupé V6
• !! Oil seals leaking from heat stress from 100,000 km

  The high heat generated in the tight V6 engine bay causes seals to harden and crack prematurely. Oil escapes at various points, resulting in heavy contamination in the engine bay and creeping oil loss.

  Symptoms: Oil spots under the car, dropping oil level, oil smell in engine bay, dirty engine underside
  400–1,500 $
  Ad seal kit 2.7 V6 HDioil gasket kit DT17valve cover gasket V6 HDi

+ 3 more engine weaknesses + vehicle weaknesses

1.8L naturally aspirated engine from the EW family. Timing belt engine, solid output for the mid-size segment. Available in 116 and 125 hp.

• !! Thermostat and water pump failure from 100,000 km

  Overheating caused by a faulty thermostat or failing water pump is a common problem on the EW7. Blocked radiators compound the problem further.

  Symptoms: Temperature gauge climbs into the red, coolant loss, heater blows only cold air
  150–450 $
  Ad thermostat EW7J4water pump Peugeot 407 1.8
• !! Hydraulic tappets blocked by oil contamination from 140,000 km

  The hydraulic tappets on the EW7 are sensitive to contaminated or incorrectly viscosed oil. From around 140,000 km deposits build up in the oil channels. The engine then briefly runs on three cylinders after cold start. Peugeot workshop charges 700–1,200 Euro for replacement.

  Symptoms: Rough running after cold start for the first few kilometres, fuel smell, fault codes 'exhaust aftertreatment anomaly' and 'misfire cylinder X'
  450–1,200 $
  Ad hydraulic lifter EW7 1.8 16V Peugeot 307 406valvestößel 1.8 16V EW7J4 replacement
• ! Leaking cam cover and sump gaskets from 120,000 km

  The EW7J4 develops oil leaks at the cam cover gasket and sump gasket with age. Regular inspection and timely seal replacement recommended.

  Symptoms: Oil spots under the car, dropping oil level, oil smell in engine bay
  80–250 $
  Ad valve cover gasket EW7J4oil pan gasket Peugeot 1.8 16V

+ 3 more engine weaknesses + vehicle weaknesses

Large 2.0L naturally aspirated engine with 140 hp. Timing belt engine, robust and powerful. Good foundation for sporting models.

• !! Ignition coil failure from 80,000 km

  The ignition coils of the EW10 fail regularly and cause misfires. On the 206 there was even a TSB with a wiring modification (capacitor on the connector). Individual cylinders drop out.

  Symptoms: Juddering under acceleration, engine management light, increased fuel consumption, rough idle
  80–300 $
  Ad ignition coil EW10J4ignition coilnset Peugeot 307 2.0
• !! Camshaft sensor failure from 90,000 km

  The camshaft position sensor of the EW10 is prone to dirty contacts and intermittent failures. The engine can stall under throttle and requires careful application of the accelerator.

  Symptoms: Engine stalls when blipping the throttle, warm-start problems, sporadic fault codes
  50–200 $
  Ad camshaftnsensor EW10camshaftnpositionsgeber Peugeot 2.0 16V
• !! Electric thermostat defective from 80,000 km

  The electric thermostat of the EW10A fails frequently and causes overheating issues or too-low operating temperature. Converting to a mechanical thermostat is a well-known workaround.

  Symptoms: Temperature gauge fluctuates significantly, engine does not reach operating temperature, overheating warning
  100–350 $
  Ad thermostat EW10 elektrischthermostat Peugeot 307 2.0 16V

+ 3 more engine weaknesses + vehicle weaknesses

2.2L naturally aspirated engine with 158 hp for higher-spec models. Timing belt every 120,000 km, otherwise solid.

• !! Leaking camshaft and cam cover seals from 80,000 km

  The EW12J4 is strongly prone to oil loss at camshaft seals and cam cover gaskets. The camshaft seals are particularly affected and can lead to serious damage if ignored.

  Symptoms: Oil spots under engine, oil smell, visible oil traces at cam covers, dropping oil level
  150–500 $
  Ad camshaftndichtring EW12J4valve cover gasket Peugeot 2.2 16V
• !! VVT phaser knocks and fails from 70,000 km

  The variable valve timing regulator of the EW12J4 begins knocking from around 50,000 km and can fail completely between 70,000–80,000 km. Repair costs are typically 400–600 EUR.

  Symptoms: Knocking on cold start, rattling at idle, rough engine running, power loss
  400–600 $
  Ad Phasenregler EW12J4VVT camshaftnversteller Peugeot 2.2
• !! Hydraulic bucket tappets wear out from 100,000 km

  The hydraulic tappets of the EW12J4 frequently fail from around 100,000 km. Due to the complex design with two balance shafts the engine is inherently noisy; worn tappets make this considerably worse.

  Symptoms: Ticking valve noise cold and warm, loud idle, slight power loss
  300–800 $
  Ad hydraulic lifter EW12J4bucket tappet Peugeot 2.2 16V

+ 3 more engine weaknesses + vehicle weaknesses

3.0L V6 from PSA. Smooth and dependable, but high fuel consumption. Timing belt replacement laborious and expensive.

• !! Timing belt damaged by oil contamination from 90,000 km

  Leaking camshaft or crankshaft seals allow oil to reach the timing belt. The oil degrades the rubber, the belt slips and valve timing shifts. Valve damage is a real risk.

  Symptoms: Uneven engine running, compression loss on individual cylinders, engine warning light, in the worst case engine damage
  600–1,500 $
  Ad timing belt ES9J4Stiming belt kit Peugeot 607 3.0 V6Wellendichtring ES9
• !! Oil loss at camshaft covers from 80,000 km

  The ES9 V6 is strongly prone to oil leaks at the camshaft covers. Escaping oil can reach the timing belt and cause belt slippage or even engine fire. Regular inspection is mandatory.

  Symptoms: Oil spots in engine bay, oil smell, visible oil traces at cylinder heads, burning smell
  300–800 $
  Ad valve cover gasket ES9J4Scamshaft gasket Peugeot 3.0 V6
• !! Ignition coil failures cause misfires from 80,000 km

  The six individual ignition coils of the ES9 V6 are prone to failure, leading to misfires on individual cylinders. The problem often develops gradually.

  Symptoms: Juddering at certain RPMs, engine management light, noticeable power loss, increased fuel consumption
  120–400 $
  Ad ignition coil ES9J4S V6ignition coil Peugeot 607 3.0

+ 3 more engine weaknesses + vehicle weaknesses