Audi A1 Power Loss: Bad Intake Manifold Symptoms

As someone with some repair experience, I encountered nearly identical symptoms with my 2011 Audi A3 diesel. The engine light came on, and I noticed similar issues with reduced power and inconsistent airflow control. The diagnosis confirmed a defective switch intake manifold control. The flap control mechanism was stuck, causing improper airflow distribution and affecting engine performance. The repair required replacing the entire intake manifold assembly, which cost 465 Euro including parts and labor. The fix completely resolved all symptoms: No more power loss, Smooth acceleration, Normal fuel consumption, Proper engine operation, No more hissing sounds The repair took about 4 hours at the workshop. They also performed a complete intake system cleaning while the manifold was off, which helped ensure optimal performance after reassembly. To provide more specific advice for your case, could you share: Current mileage, Whether check engine light is on, Any error codes from diagnostics, When symptoms first appeared, Any recent maintenance performed These details would help determine if your A1 is facing the same issue and whether preventive measures might help extend the life of the new components.

Last service was performed at 160327 KM where they also checked the engine control unit for stored error codes. The engine misfire symptoms started shortly after, accompanied by the engine light. I found error code P2015 which suggests intake manifold issues. The repair shop originally suggested cleaning the intake system but that did not resolve the rough running. Your experience matches my symptoms exactly, especially the hissing and poor airflow control. This is helpful confirmation that the intake manifold likely needs full replacement rather than just cleaning. I will schedule the repair and request they do the complete intake system cleaning you mentioned while everything is apart. The 465 Euro cost seems reasonable considering the work involved.

I want to follow up about this since I went through the same repair on my A3. After getting the full manifold replacement and intake cleaning done, I made some observations that might help: The engine performance returned completely to normal and stayed that way for over 80000km now with no recurring issues. The error code P2015 never came back after the fix. A few maintenance tips that helped prevent new intake system problems: Using high quality fuel from reputable stations, Keeping up with regular oil changes using proper spec oil, Replacing the air filter at recommended intervals, Running the engine at higher RPMs occasionally to clear carbon buildup The reduced power and engine misfire symptoms you describe match exactly what I experienced before the repair. The complete fix was worth every cent compared to just trying intake cleaning alone, which usually only provides temporary improvement with these symptoms. Make sure they also check the actuator motor and wiring while doing the manifold replacement. In my case, they found slight corrosion on the connector that could have caused problems later if not addressed during the repair.

Thanks for that detailed info. I will get the repair scheduled and make sure to request a full inspection of the actuator motor and wiring harness while they have everything apart. The symptoms match perfectly, especially the power loss and that distinctive hissing from the air intake area. The engine light coming on right after the last service does suggest they may have disturbed something while checking the engine control unit. At least now I know a proper fix exists rather than continuing to try band-aid solutions like just cleaning the intake system. I appreciate the maintenance tips too. I will be more diligent about using better fuel and getting the air filter changed regularly once the new manifold is installed. The rough running and poor airflow control have been quite concerning, so I am relieved to hear the repair should fully resolve these issues if I get the complete job done right. I will update once the work is completed. The 465 Euro estimate sounds fair for the full manifold replacement and cleaning. Hopefully my repair experience goes as smoothly as yours did with lasting results.