2001 Audi A4 Questions

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Without the air sensor the car works perfectly fine although a lot more air is heard from the engine, however when I plug it back in the car suddenly drops in rpm until it finally turns off.
He checked level and it was low so he added oil but the light won't stop flashing and there is a chattering sound at low rpm's. Any ideas? FYI, he just replaced the coil and alternator.
My AUDI A4 2001, got water in the brake booster and started to freeze the brakes and recently the brake is holding the wheels and rims and get hot and crashes itself once in a while in progress and ABS and ESP lights ...
Could my oil pick up screen be plugged .
the car has been through 2 motors so i would like to get a new motor and have a certified mechanic install it
My car was running perfectly yesterday and this morning when i turned it on it started fine, it was running fine but when i tried to take off it died. Every time it will start perfectly but if i even rev the car it wi...
My oil light comes on and beeps 3 times and continues to do this all the time. I just had it serviced and had the censor replaced and there is oil pressure.
Cant find the transmission oil dipstick to check the oil, why would it be so hard to find? where is it? and how do I add tranny oil?
load rattling noise when engine starts
rattling noise in front part of engine compartment when car is started
Hi, I tried to get my 2001 Audi smogged over the weekend and the smog tech. said that the check engine light is not working. Does anyone have any idea what could be wrong? We have checked the fuses and they are a...
I recently purchase and Audi A4 Quattro 2001 1.8 and the car unfortunately did not come with any manuals what so ever. Until I come with the excessive money to replace the instructions (radio codes, mileage profiles o...