Audi a4 quattro 1999 airbag sensor

door sensor--seat belt sensor----airbag sensor

You make it sound like it's our fault you can't find it :>D

The start of production of the Audi A4 B5 is 1994. With minor changes, it was produced until 2001. At first, only the sedan version was available, the station wagon (Avant) appeared a year later. This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and locations.

Can't get much clearer than this. Relay 4 is one plus 'Additional Relays 23 and 24. Plus fuse 23 and 24.

Fuse box diagram Audi A4 B5 and relay with assignment ...

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This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and ...
‎Passenger compartment · ‎Main fuse box · ‎Relay box · ‎Engine compartment

141 o2 sensor heater, bank 1, sensor 2

Try unlocking the car with the key on the passenger side and locking it again, that resets the alarm. Use the key to unlock the car, same problem on my Audi estate of the same age. Found out later one of the windows was still open and the sensor detected that.
Manu

this is a picture showing the p0050 sensor is bank 2 sensor 1, hope help.

you might try a different garage to deal with, there are many competent mechanics self employed, but audi has always been expensive to repair

Audi A4 1.8 quattro 1997 automatic transmission does not change gears sometimes. It revs very high but the gear seems to be put in neutral

your crankshaft positon sensor is defective. Replace it and the epc will never come back and no more dying out. this happened to me several times and it would just come and go. i replaced it and now the car starts right away and the epc light hasnt returned since

Could be thermostat this regulates the water flow around the engine to keep it cool sounds like it is sticking open when water gets hot!!

The main thing with dealing with airbags is to ground yourself before plugging them in. Any electronics shop can sell you an ESD (electrostatic discharge) wrist strap and ground cord for a few dollars. Use this to ground yourself securely to the frame of the car. This gives a pathway for static electricity in your body to discharge into the car, rather than into the airbag connector, potentially blowing the airbags. All the same, whenever possible, don't sit in front of the bag you're installing in case something goes wrong and it does blow.