VW Tiguan Diesel Stalling: Likely Fuel Pump Failure

I had similar symptoms with my VW Passat 2.0 TDI. After automotive diagnosis, it turned out the electrical connection to the high-pressure fuel pump was corroded and making poor contact. This caused intermittent power delivery issues, rough running, and unusual stalling. The car performance issues you describe match classic fuel delivery problems. The combination of stalling, rough idle, and high consumption often points to either the fuel pump or its electrical connections. These symptoms are common in diesel engines when the fuel system is not maintaining correct pressure. In my case, the auto repair involved cleaning the connector pins, replacing the wiring harness section, and testing the pump operation. The pump itself was functioning correctly, just getting inconsistent power. The mechanic also checked the fuel pressure regulator and cleaned the fuel filter housing while troubleshooting. This ended up being a serious issue that required proper diagnosis tools and expertise with VW diesel engines. Would strongly recommend finding a shop that specializes in German diesel pump failure diagnosis, as these fuel systems are quite complex. Before replacing the entire pump, have them check all electrical connections and wiring. Sometimes what seems like pump failure is actually just a wiring issue that can be fixed for much less.

Thanks for sharing that electrical connection fix. My issue turned out to be very similar with my Tiguan, corroded wiring was causing the fuel injector system to malfunction. The car performance is back to normal now and no more stalling issues. Do you remember roughly how much you paid for the repair? Also curious if youve had any fuel system problems since getting it fixed? Always good to know what to watch out for with these engines.

Glad you got it sorted out with your Tiguan. After my fuel pump issues were diagnosed, the repair was straightforward, just 95€ to fix the faulty cable connection. The mechanic confirmed the pump itself was working fine, which saved a lot compared to a full fuel pump replacement. No engine stalling or fuel system problems since the repair was done 8 months ago. The car runs smooth, fuel consumption is back to normal, and the check engine light hasnt returned. These electrical connection issues can really make it seem like major fuel pump failure when its actually just poor wiring contact. Just keep an eye on your fuel injector performance and listen for any unusual engine sounds. Regular maintenance checks of the fuel system connections can prevent these issues from developing again. The diesel engines in these cars are reliable when the electrical systems are properly maintained.

After dealing with those stalling issues, I finally found a reliable mechanic who properly diagnosed the problem. The electrical connections to my fuel injectors were corroded, causing all those symptoms. Took the car in last week and the auto repair was much simpler than expected. The automotive diagnosis showed no actual pump failure, which was a relief. The mechanic cleaned all the connections, replaced some wiring, and ran a full fuel system test. Total cost came to 180€, much better than the 900€ quote I got for a new pump at the previous shop. Car runs perfectly now, no more stalling, normal fuel consumption, and the check engine light is gone. Really glad I got a second opinion and found someone who actually knew what they were looking at. Makes a huge difference when you find a mechanic who takes time to do proper troubleshooting instead of just replacing parts.