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 MANUALSAUDI2004A8REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICAL4.2L - ENGINE MECHANICAL, ENGINE CODE(S): BFM15 - ENGINE - CYLINDER HEAD, VALVETRAINVALVETRAIN, ASSEMBLY OVERVIEWCAMSHAFT POSITION (CMP) SENSOR SEALS, REPLACING

2004 Audi A8

Camshaft Position (CMP) Sensor seals, replacing

2004 Audi A8SECTION Camshaft Position (CMP) Sensor seals, replacing

Special tools, testers and auxiliary items required

Fig 1: Seal Remover 2085

GW00017359

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Seal remover 2085

Fig 2: Seal Installer 3241

GW00017360

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Seal installer 3241

Work procedure

Left cylinder head:

Fig 3: Removing Engine Cover

GW00028716

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove engine cover - 1 - upward.
Remove left combination valve for secondary air injection system → Secondary Air Injection (AIR) (left combination valve), removing and installing .

Fig 4: Disconnecting Electrical Harness Connector At Camshaft Position (CMP) Sensor 2 G163

GW00028841

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector - arrow - at Camshaft Position (CMP) Sensor 2 G163.
Remove housing for Hall sensor.
Remove washer and cover for Hall sensor.

Right cylinder head:

Fig 5: Removing Engine Cover

GW00028716

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove engine cover - 2 - upward.
Pull lock carrier toward front → Lock carrier, pulling toward front .

Fig 6: Disconnecting Electrical Harness Connector At Camshaft Position (CMP) Sensor G40

GW00028842

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector - arrow - at Camshaft Position (CMP) Sensor G40.
Remove right toothed belt cover.

Fig 7: Identifying Hall Sensor & Bolts

GW00028843

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts - arrows -.
Pull toothed belt guard slightly toward front and remove camshaft position sensor.
Remove washer and cover for Hall sensor.

Continued for both sides:

NOTE:

In the following illustrations, the right cylinder head is depicted.

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.