BMW 3 Series Service Manual (E39)

- - -

Exhaust System

Oxygen sensors (precatalyst), replacing

(M52 TU and M54)

The precatalyst oxygen sensors are installed at the top of the exhaust manifolds.

WARNING-

Allow components to cool before servicing.

-Using BMW scan tool DlSplus (Diagnostic Information System) or equivalent, read out and clear ECM fault codes.

Working at right side of engine above exhaust manifolds, remove front or rear oxygen sensor harness connector (arrows) from bracket, then separate plug.

NOTE-

Inphoto, secondary air pump has been removed for clarity.

Remove oxygen sensor using special oxygen sensor removal socket.

Installation is reverse of removal

New sensor threads come coated with anti-seize paste.

If reusing a sensor, apply thin coat of anti-seize paste to threads only. Do not contaminate tip of sensor with paste or lubricants of any sort.

Install harness and connector in original location.

Oxygen sensors (post-catalyst), replacing

(M52 TU and M54)

The post-catalyst oxygen sensors are installed at the rear of the catalytic converters.

WARNING-

Allow components to cool before servicing

-Using BMW scan tool DlSplus or equivalent, read out and clear ECM fault codes.

-Remove large cover from above fuel raillintake manifold.

Exhaust System

M52 engine

(5281 1997-1998)

1.Exhaust manifolds

2.Sealing washer

3.Plug

4.Gasket (manifold to cylinder head)

5.Clamping sleeve

6.Post-catalytic converter oxygen sensor

7.Pre-catalytic converter oxygen sensor

8.Hanger

9.Rear muffler

10.Vibration dampener

11.Center support bracket

12.Clamping sleeve

13.Front pipe with catalytic converters

14.Hanger

15.Center muffler

16.Gasket (front pipe to manifold)

IExhaust System

M52 TU and M54 engines

(528i 1999-2000 and 525i 2001-2003)

1. Transmission bracket

2. Center support bracket

3. Front muffler

4. Clamping sleeve

5. Vibration dampener

6. Hanger

7. Rear muffler

8. Hanger

9. Center muffler

10. Oxygen sensors, post-catalytic converter

11. Oxygen sensors, pre-catalytic converter

12. Exhaust manifoldlcatalytic converter assemblies

Exhaust systeml

M54 engine

(5301 2001-2003)

Clamping sleeve

Front muffler

Rear muffler

Hanger

Vibration dampener

Clamping sleeve

Center muffler

Hanger

Gasket (front pipe to manifold)

10.Exhaust manifold/catalytic converter assemblies

11.Oxygen sensors, post-catalytic converter

12.Oxygen sensors, pre-catalytic converter

IExhaust System

M62 engine

(540i 1997-1 998)

1. Right side catalytic converters

2. Support bracket

3. Support bracket

4. Center muffler

5. Hanger

6. Rear muffler

7. Clamping sleeve

8. Oxygen sensors, post-catalytic converter

9. Oxygen sensors, pre-catalytic converter

10. Left side catalytic converter

11. Sealing rings

12. Left front exhaust manifold

13. Left rear exhaust manifold

14. Gasket

15. Exhaust manifold, right front

16. Exhaust manifold, right rear

Exhaust systeml

M62 TU engine

(540i 1999-2003)

1.Oxygen sensors, pre-catalytic converter (2)

2.Oxygen sensors, post-catalytic converter (2)

3.Hanger

4.Rear muffler

5.Clamping sleeve

6.Hanger

7 . Center muffler

8.Clamping sleeve

9.Catalytic converter, left side

10.Catalytic converter, right side

11.Exhaust manifoldlcatalytic converter, left side

12.Gasket (2)

13.Gasket (2)

14.Exhaust manifoldlcatalytic converter, right side

200 Transmission-Genera!

This repair group covers general application information for the clutch, manual and automatic transmissions, shift linkages and driveshaft.

Drivetrain

BMW E39 models are equipped with a longitudinal drivetrain. The transmission is bolted directly to the rear of the engine. A driveshaft connects the output shaft of the transmission to the rear final drive. Individualdrive axles with integrated constant velocity joints transfer rotational power from the final drive unit to the rear wheels.