✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Timing chain stretch (1.2 TSI built before 10/2011)
usually 30,000–120,000 km · High risk
model years 2009–2012 onlyengine codes: CBZA, CBZB, CBZC
Signs: Rattle for a few seconds on cold start, later constant rattle, engine light; the chain can jump and destroy the valves
Fix: Check chain elongation with diagnostics; replace chain, guides, tensioner and sprockets with the revised (post-10/2011) kit
€700–1,500
Timing chain stretch or tensioner fault (1.4 TSI)
usually 60,000–180,000 km · High risk
engine codes: CAXA, CAXC, CAXD, CMSA, CNWA, BMY
Signs: Rattle for a few seconds on cold start, camshaft position codes, engine light; the chain can jump and damage the engine
Fix: Check chain elongation with diagnostics; replace chain, guides, tensioner and the oil pump drive chain parts; check the camshaft adjuster
€800–1,800
Piston / ring land damage (1.4 TSI twincharger)
usually 60,000–160,000 km · High risk
engine codes: BMY, BLG, BWK, CAVA, CAVB, CAVC
Signs: Misfire, low compression on one cylinder, rising oil use, EPC light
Fix: Compression and leak-down test, endoscope check; replace the damaged pistons or the short block; use 98 RON fuel
€2,000–5,000
Increased oil consumption
usually 80,000–200,000 km · Medium risk
Signs: Oil level warning between services, blue smoke, sooted plugs
Fix: Measured consumption test; check crankcase ventilation and leaks; on confirmed ring wear new rings or pistons
€100–3,000
Turbo wastegate actuator or linkage fault (mainly 1.2 TSI)
usually 60,000–160,000 km · Medium risk
Signs: EPC light, sudden power loss, boost codes such as P0299 / P334B, rattle from the turbo
Fix: Check the actuator and linkage; free the linkage or fit the VW shim kit, otherwise replace and calibrate the actuator, or the turbo if the flap is worn
€300–1,200
Water pump leak (twincharger: pump with supercharger clutch)
usually 60,000–160,000 km · Medium risk
Signs: Coolant loss, temperature warning; on the twincharger also weak low-rpm pull or a squeal when the supercharger engages
Fix: Pressure-test the cooling system; replace the water pump (on the twincharger the pump module with the magnetic clutch) and the drive belt
€250–700
Carbon build-up on intake valves
usually 80,000–200,000 km · Wear part
Signs: Rough idle when cold, hesitation, power loss, misfire codes
Fix: Inspect with an endoscope; clean the intake valves mechanically (walnut blasting); fuel additives do not reach the valves
€250–700