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.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTAPPLICATION AND IDENGINE IDENTIFICATION
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Engine Identification
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Engine Identification
ENGINE VIN CODE [1]: F
ENGINE DESIGNATION CODE [2]: AEW
ENGINE CONFIGURATION [3]: V-8
DISPLACEMENT: 3.7L (3696cc/226ci)
COMPUTER SYSTEM [4]: MPI Bosch Motronic 5.4.2
FUEL SYSTEM [5]: Sequential Multi-Point Fuel Injection
IGNITION SYSTEM [6]: Mapped Electronic Ignition
[1] 5th digit of Vehicle Identification Number (VIN). VIN plate mounted atop driver's side instrument panel, visible through windshield lower left corner.
NOTE: Image for illustration purposes.
[2] Engine code and serial numbers are stamped on the left side of the cylinder block (arrow) directly above the power steering pump.
[3] DOHC 32-valve (4 valves per cyl.), 230 HP @ 5800 RPM.
[4] MPI Bosch Motronic with OBD II. System uses single control module for both fuel and ignition control. Motronic is fully adaptive.
[5] Fuel System uses 4-hole single-spray solenoid-type injectors, dual oxygen sensor feedback, start and idle speed control, after start and acceleration enrichment, deceleration fuel shut-off.
[6] Transistorized Distributorless Ignition System, Coils controlled by Power Stages, Hall sender and cylinder selective Knock Control.
ENGINE DESIGNATION CODE [2]: AEW
ENGINE CONFIGURATION [3]: V-8
DISPLACEMENT: 3.7L (3696cc/226ci)
COMPUTER SYSTEM [4]: MPI Bosch Motronic 5.4.2
FUEL SYSTEM [5]: Sequential Multi-Point Fuel Injection
IGNITION SYSTEM [6]: Mapped Electronic Ignition
[1] 5th digit of Vehicle Identification Number (VIN). VIN plate mounted atop driver's side instrument panel, visible through windshield lower left corner.
NOTE: Image for illustration purposes.
[2] Engine code and serial numbers are stamped on the left side of the cylinder block (arrow) directly above the power steering pump.
[3] DOHC 32-valve (4 valves per cyl.), 230 HP @ 5800 RPM.
[4] MPI Bosch Motronic with OBD II. System uses single control module for both fuel and ignition control. Motronic is fully adaptive.
[5] Fuel System uses 4-hole single-spray solenoid-type injectors, dual oxygen sensor feedback, start and idle speed control, after start and acceleration enrichment, deceleration fuel shut-off.
[6] Transistorized Distributorless Ignition System, Coils controlled by Power Stages, Hall sender and cylinder selective Knock Control.
RENDER: 1.0x
NO RELATED
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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.