For 2003 A4 S4 B6 Audi recommends to use: H11 12V 55W PGJ19-2, H7 12V 55W PX26d Longlife, WY5W 12V 5W W2.1x9.5d yellow, W5W 12V 5W W2.1x9.5d, C10W 12V 10W SV8.5-8, P21W 12V 21W BA15s, C5W 12V 5W SV8.5 (11x35), PY21W 12V 21W BAU15s yellow, P21, PY21W 12V 21W BAU15s interference, D1S 85V 35W PK32d-2, D2S 85V 35W P32d-2, H6W 12V 6W BAX9s, W5W 12V 5W W2.1x9.5d Longlife, W3W 12V 3W W2.1x9.5d, and R5W 12V 5W BA15s. To select the right part or fluid see the table below.
in your garage to make future searches easy.
Condition
Value
expand_moreFront light sources
expand_moreFog lamps
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
H11 12V 55W PGJ19-2
expand_moreFront direction indicator
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
Variant 1
PY21W 12V 21W BAU15s yellow
Variant 2
PY21W 12V 21W BAU15s interference
expand_moreHigh beam
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
H7 12V 55W PX26d Longlife
expand_moreLow beam
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
S-Line model
D1S 85V 35W PK32d-2
With bi-xenon
D1S 85V 35W PK32d-2
With halogen headlamp
H7 12V 55W PX26d Longlife
Xenon headlights
D2S 85V 35W P32d-2
expand_moreParking light
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
S-Line model
H6W 12V 6W BAX9s
With bi-xenon
H6W 12V 6W BAX9s
With halogen headlamp
W5W 12V 5W W2.1x9.5d Longlife
Xenon headlights
H6W 12V 6W BAX9s
expand_moreSide direction indicator
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
WY5W 12V 5W W2.1x9.5d yellow
expand_moreInternal light sources
expand_moreBoot light
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
In tailgate
W5W 12V 5W W2.1x9.5d
Otherwise
W3W 12V 3W W2.1x9.5d
expand_moreDoor safety light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
W5W 12V 5W W2.1x9.5d
expand_moreEntry light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
W5W 12V 5W W2.1x9.5d
expand_moreFootwell light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
W5W 12V 5W W2.1x9.5d
expand_moreGlove compartment light
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
With cooled glove compartment.
W3W 12V 3W W2.1x9.5d
Otherwise
W5W 12V 5W W2.1x9.5d
expand_moreInterior light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
C10W 12V 10W SV8.5-8
expand_moreReading light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
W5W 12V 5W W2.1x9.5d
expand_moreRear light sources
expand_moreBack-up lamp
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
P21W 12V 21W BA15s
expand_moreLicense plate light
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
C5W 12V 5W SV8.5 (11x35)
expand_moreRear direction indicator
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
PY21W 12V 21W BAU15s yellow
expand_moreRear fog lamp
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
P21W 12V 21W BA15s
expand_moreStop lamp
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
P21
expand_moreTail light
expand_moreS4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
Taillight
R5W 12V 5W BA15s
Taillight brake light
P21
Servicing your Audi use only recommended parts, oils, fluids and lubricants.
Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Audi A4 S4 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.
Before doing any DIY service please check your insurance policy and Audi warranty policy for your region. In some regions DIY service may invalidate your warranty.
DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Audi A4 S4 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.
Doing basic service for your 2003 Audi A4 S4 you're not only saving money, but also also improving your technical skills and learning something new.