No bulb position given in question. See Sources and Related Links below.
The 2009 Audi A4 has an inline 4 engine.
The 2009 Audi A4 has a 2.0 L base engine size.
The 2009 Audi A4 has 16 valves.
The 2009 Audi A4 is a gas-powered vehicle.
The headlight bulb for the 2004 Audi A4 depends on whether you have HID or Halogen lighting system. See Sources and Related Links below.
The 2009 Audi A4 has double overhead cam (DOHC).
The height of the 2009 Audi A4 is 4 ft. 8.2 in. (56.2 in.).
The 2009 Audi A4 has a drag coefficient of 0.28 Cd.
The 2009 Audi A4 has a continuously variable-speed automatic.
The 2009 Audi A4 is 15 ft. 5.2 in. (185.2 in.) long.
The curb weight of the 2009 Audi A4 is 3527 lbs..
The 2009 Audi A4 has 40.0 in. of front head room.