From the Wolf Auto Parts shop floor

DIY Guides & Resources

Repair walkthroughs and reference articles for Audi, VW, BMW, and Porsche owners — written by the people who dismantle these cars every day.

Audi & VW Relay List / Functions

Look up Audi and VW relay numbers, what each relay controls, and the OEM part number to replace it.

Service intervals, labor times, special tools, and failure symptoms for every belt-driven Audi engine.

Swap a Q7 HID bulb in 15 minutes with one screwdriver — no bumper removal needed.

Open an Audi/VW flip key and swap the CR2032 battery without breaking the housing.

Drop the dome light housing and pull the A3 8P sunroof motor in about 10 minutes.

Pull a B6 A4 headlamp with four Torx screws — including the two hidden ones.

Swap a TT MK1 shift boot in five minutes with a single Torx-20 bit.

RWD vs xDrive in winter, why tires matter most, and our BMW snow ratings.