Peugeot 306 N5

Robust PSA entry-level engine (1.4L, 55 kW) with simple 8V technology — one of the most durable engines in the entire PSA lineup. Low on power, but extremely easy to maintain and cheap to run. Replace the timing belt every 120,000 km, change spark plugs and oil — that is all the TU3 needs. The throttle body gets dirty occasionally. With correct maintenance, a 300,000 km engine without any caveats whatsoever.

• !! Head gasket leaking from 120,000 km

  The original head gasket of the TU3 is prone to leaks, particularly when incorrect coolant is used. PSA-specific G33 coolant is required — other coolants attack the gasket.

  Symptoms: Oil in coolant (brown emulsion on filler cap), dropping coolant level without visible leak, oil traces at the mating face, overheating
  300–800 $
  Ad cylinder head gasket TU3cylinder head gasket Peugeot 206 1.4ZKD TU3JP
• !! Ignition coil module fails repeatedly from 80,000 km

  The ignition coil pack of the TU3 is a known weak point, especially on early 206 models. PSA issued a technical service bulletin for installing a capacitor on the connector. Repeated failures are typical.

  Symptoms: Misfires, hesitation under acceleration, engine stalls, engine management light flickers, poor cold start
  60–200 $
  Ad ignition coil TU3 206Spule pack Peugeot 206 1.4ignition module TU3JP
• !! Thermostat sticks — engine overheats from 90,000 km

  The thermostat of the TU3 frequently sticks in the closed position, preventing coolant from circulating. The poorly designed thermostat housing with an awkwardly positioned sensor makes the problem worse.

  Symptoms: Temperature gauge rises quickly into the red, heater produces no warmth, coolant boils over, engine overheats
  50–200 $
  Ad thermostat Peugeot 206 1.4thermostat TU3coolantthermostat 206

+ 3 more engine weaknesses + vehicle weaknesses