Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Audi A4 Base, 1.8 C, StandardFACTORY OEM SERVICE PROCEDURE
Technical Data
TECHNICAL DATA
| Engine code letters | AMB (1.8 l / 5V / 125 kW-engine) |
|---|---|
| Idle speed Not adjustable - controlled by the idle speed stabilization |
700 to 860 RPM |
| Engine speed limitation Shuts off injectors |
approx. 6800 RPM |
| Ignition timing is determined by the control module. Ignition timing cannot be adjusted. |
 |
| Ignition system | Individual coil system with 4 ignition coils (power output stages integrated) connected directly to spark plugs via spark plug connectors |
| Spark plugs | Tightening torque: 30 Nm |
| Firing order | 1-3-4-2 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.