Fiat 695 312

The 1.4 T-Jet in Abarth tune is a characterful sports engine running at significantly higher thermal loads than the standard version — the character is right, and the weak points are well-documented and manageable. Exhaust manifold cracks appear from around 30,000–40,000 km, sometimes earlier with consistently hard use; the symptom is a whistling sound under load and reduced boost pressure build-up. The reinforced esseesse manifold (approx. €250) has proven the reliable long-term fix. The turbocharger is fundamentally robust but should not be switched off immediately after high-load driving — 1–2 minutes at idle allows oil circulation and cooling. Ignition coils are a wear item as with all T-Jet variants. Change oil no later than every 10,000 km; after spirited use, inspect for leaks around the manifold area.

• !! Timing belt: short replacement intervals must be observed from 120,000 km

  The 1.4 T-Jet is belt-driven. According to the manufacturer every 120,000 km or 6 years (4 years in harsh conditions). Failure causes total engine damage. Small belt pulleys stress the belt more than usual due to severe bending.

  Symptoms: No warning before failure — engine won't start, metallic impact noises
  450–750 $
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• !! MTA gearbox: hollow pin comes loose, gear blocking from 30,000 km

  On the MTA-C510 gearbox, a hollow pin can come loose from its bearing and rub against a guide bush. Depending on temperature and gear, this causes gear blocking up to complete gearbox failure with the vehicle stopping. Fiat carried out a service action.

  Symptoms: Gearbox shifts to neutral when braking instead of first gear; subsequently no gear can be engaged; vehicle must be towed
  800–2,500 $
  Ad MTA gearbox C510 AbarthHydraulikspeicher MTA 595Schaltaktor MTA Abarth
• !! Exhaust manifold crack from 35,000 km

  The cast-iron manifold develops hairline cracks from ~35,000 km due to thermal cycling — even in stock tune. Air leakage corrupts the lambda signal and costs boost. The reinforced esseesse manifold is the permanent fix.

  Symptoms: Whistling or hissing at 2,000–3,000 RPM, especially on cold starts; boost gauge no longer reaching maximum; faint exhaust smell in the engine bay.
  220–450 $
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