✓ 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 tensioner (old type) lets the chain jump (Gen 1/2)
usually 60,000–200,000 km · High risk
model years 2007–2015 onlyengine codes: BYT, BZB, CABA, CABB, CABD, CAWA
Signs: Rattle for a few seconds after a cold start, codes P0016 / P0017; a chain that jumps bends the valves
Fix: Check chain stretch in live data; fit the revised tensioner 06K109467K and, if the chain is stretched, the chain, guides and gears as a set
€600–1,500
Oil pressure loss: balance shaft / oil pump drive (Gen 1/2)
usually 100,000–250,000 km · High risk
model years 2007–2015 onlyengine codes: BYT, BZB, CABA, CABB, CABD, CAWA
Signs: Oil pressure warning at various revs, rattle from the lower front of the engine
Fix: Stop the engine; measure oil pressure, check the oil pickup screen, the lower chain with its tensioner and guide, and the balance shafts; replace as a set
€800–2,500
Coolant pump / thermostat housing leak (plastic)
usually 60,000–160,000 km · Medium risk
Signs: Coolant loss, coolant smell, fluctuating temperature gauge, slow warm-up or overheating warning
Fix: Find the leak with UV dye or a pressure test; replace the pump and thermostat module as one unit
€350–900
Carbon build-up on intake valves (Gen 1/2, direct injection only)
usually 80,000–180,000 km · Medium risk
model years 2007–2015 onlyengine codes: BYT, BZB, CABA, CABB, CABD, CAWA
Signs: Rough idle, misfires when cold, power loss, higher fuel use
Fix: Inspect the valves with an endoscope; clean the intake ports (walnut blasting or by hand)
€300–700
Intake manifold flap actuator or linkage (P2015, Gen 1/2)
usually 80,000–180,000 km · Medium risk
model years 2007–2015 onlyengine codes: BYT, BZB, CABA, CABB, CABD, CAWA
Signs: Engine light with P2015, rough idle, whistling (vacuum leak) if the linkage pops off
Fix: Check the linkage and stops and clean off carbon; replace the intake manifold (latest version) and adapt the flaps
€200–900
Crankcase ventilation (PCV) valve: torn membrane
usually 60,000–150,000 km · Wear part
Signs: Whistle or hiss at idle, rough idle, lean codes (P0171), higher oil use, oil leaks at seals
Fix: Check fuel trims in live data; replace the PCV valve / oil separator
€100–350
Turbo wastegate actuator wear (boost faults, limp mode)
usually 80,000–200,000 km · Medium risk
Signs: Power loss, boost pressure codes (e.g. P0299), limp mode
Fix: Compare set and actual boost in live data to rule out leaks; repair or replace the actuator, or the turbo if the wastegate itself is worn
€300–1,800