THINK TWICE

The 2.0 TDI's Bosch CP4 high-pressure fuel pump can fail catastrophically and destroy the entire fuel system. When the CP4.2 pump self-destructs it sheds metal debris that circulates through the injectors, rails and lines, so the repair is not a pump swap but a full fuel-system replacement -- tank to injectors -- typically quoted in the region of $8,000-$10,000. Owners describe it striking without warning (a stall or no-start, the car stranded in traffic), and it is not confined to high mileage: corpus complaints on these diesels include failures well under 30k miles as well as older cars. No federal recall covers the CP4, so this is a complaint-sourced defect with no VIN campaign to check -- it must be verified through the car's history.

Check — Ask whether the high-pressure (CP4) fuel pump has ever failed or been replaced, and if so confirm the repair included a full fuel-system flush/replacement (a pump-only fix leaves metal in the system). Treat any fuel-pressure fault code, hard-start, or stall history as a serious warning, and budget for a five-figure repair if it lets go -- on a diesel with an unknown pump history this is the single largest risk.

Recall 11V490000 (2011): on 2009-2012 Jetta/Jetta Sportwagen, 2010-2012 Golf and 2010-2012 Audi A3 with the 2.0L TDI common-rail diesel, the fuel-injection pulses can coincide with the natural frequency of injector line #2 under certain load and RPM conditions. The resulting resonance stresses the line, which can develop small cracks and leak fuel; leaking fuel near an ignition source can cause a fire. The remedy installs an improved #2 injector line and adds vibration dampers to all of the injector lines, free of charge. Corpus complaints in these windows corroborate the mechanism with diesel fuel leaks and sudden no-starts.

Check — Run the VIN through VW/Audi's recall lookup and confirm 11V490000 is complete. On any 2.0 TDI of this vintage, check for a diesel-fuel odor or wet fuel lines around the engine before buying.

These 2.0 TDI "clean diesel" cars are the dieselgate vehicles: VW fitted an emissions defeat device that detected the test cycle and cheated NOx limits. This was resolved through the 2016 EPA/CARB and federal court settlement -- an owner buyback or an approved emissions modification -- NOT an NHTSA safety recall, so there is no safety campaign to VIN-check and it will not show on a recall lookup. It is a compliance and value matter: an unmodified car can be difficult or illegal to register or resell in some states, while owners of cars that received the post-2016 emissions "fix" report reduced fuel economy, lost power, and drivability faults (limp/derate and regeneration problems) afterward. Buyback cars that returned to market also carry a branded/lien history worth checking.

Check — Ask whether the car received the VW/Audi emissions modification (the post-2016 "fix") or was a settlement buyback resold to the public, and get the paperwork. Confirm it can be legally registered in your state, and on the test drive watch for weak power, poorer MPG than the TDI's reputation, and any DEF/regen or limp-mode faults.

Direct injection on the EA888 2.0T lets carbon build up on the intake valves over time. Because fuel is sprayed straight into the cylinder rather than over the back of the valve, nothing washes the valves clean, and deposits gradually restrict airflow -- the symptom set is rough idle, misfires, hesitation and a check-engine light, usually past ~60k-80k miles, cured by a walnut-blasting cleaning of the valves. This is inherent to the direct-injection design rather than a defect, and it surfaces only modestly in federal data: 69 complaints across the GTI, Tiguan, Jetta and A4 windows mention carbon, misfires or a rough idle (owners rarely file safety complaints over driveability). Treat it as a maintenance cost to expect on a higher-mileage 2.0T, not a rare failure.

Check — On a higher-mileage 2.0T, listen for a rough or lumpy idle and watch for misfire codes on the test drive; ask whether the intake valves have ever been walnut-blasted. Budget for an intake-valve cleaning as routine maintenance on a direct-injection VW/Audi of this era.