S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
The diagnostic socket is at the lower edge of the dashboard on the driver's side.
expand_moreIdling speed with automatic gearbox
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
600–800 rpm600–800 rpm600–800 rpm
expand_moreIdling speed with manual gearbox
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
600–800 rpm600–800 rpm600–800 rpm
expand_moreMinimum engine oil temperature at VET
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
176°F176°F80°C
expand_morePetrol exhaust gas values
expand_moreCO content at idling speed
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
0–0.5 %0–0.5 %0–0.5 %
expand_moreCO content at increased idling speed
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
0–0.2 %0–0.2 %0–0.2 %
expand_moreIncreased idling speed
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
2500–3000 rpm2500–3000 rpm2500–3000 rpm
expand_moreLambda sensor design
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
wideband sensor
expand_moreLambda value
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
expand_morePetrol conditioning speed
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
2500–3000 rpm2500–3000 rpm2500–3000 rpm
expand_morePetrol conditioning time
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
120 s120 s120 s
expand_moreTest speed for lambda sensor signal
S4 quattro with gasoline V8 4.2 L 339 HP, 410 N⋅m at 3500 RPM engine (2003.3–2004.12)
600–800 rpm600–800 rpm600–800 rpm
To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Audi.
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.