TIS Service Bulletin

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SI B33 01 19
Rear Axle

January 2019
Technical Service

DRONING NOISE FROM THE REAR AXLE
MODEL
F80 (M3)

F82 (M4)

F83 (M4 Convertible)

F87 (M2)

SITUATION
A humming/droning noise is heard with vibration during partial to full engine load in higher gears.

CAUSE
The tuning of the rear suspension mount for the differential.

CORRECTION
Replace the rear differential mount if the specified sound can be reproduced as detailed below.

PROCEDURE
1. Confirm the noise is being produced by the tuning of the differential mount in one of the following testing
conditions:
• Drive the vehicle with the transmission in sixth gear
• Operate the engine in the range of 2500 – 3100 rpm (may also be produced at 4500-5500 rpm range)
Were you able to reproduce the noise?
YES – go to step 2.
NO – continue diagnosis.
2. Replace the rear differential suspension mount following Repair Instruction 33 17 005 Replacing the
rubber mounts for the rear axle final drive suspension at rear.

PARTS INFORMATION
Part Number

Description

Quantity

33 17 7 852 495

Rubber mounting (up to 7/2018)

1

Polyurethane rubber mount rear (7/2018 and
later)

1

Or:
33 17 8 094 690

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Refer to the ETK and the repair instructions for one-time use fasteners and/or component information regarding
additional or replacement screws, gaskets, and seals that need to be installed and claimed.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.

Defect Code:

3317003700

Vibration or droning noise (Situation 1)

Labor Operation:

Labor Allowance:

Description:

33 17 005

Refer to AIR/KSD2

Replacing the rubber mount for the rear axle final
drive suspension at the rear (Main work)

Refer to AIR/KSD2

Replacing the rubber mount for the rear axle final
drive suspension at the rear (Plus work)

Work time (WT)

Work time to confirm the source of the noise is
being produced (vehicle is already in the
workshop)

Or:
33 17 505
And, as necessary:
33 99 000

If you are using a Main labor code for another repair, use the Plus code labor operation 33 17 505 instead of 33
17 005.
Work time labor operation code 33 99 000 is not considered a Main labor operation; however, it does require an
individual punch time and an explanation on the repair order and in the claim comments section.
And, with the above:
Checking Wheel Alignment

Labor Operation:

Labor Allowance:

Description:

32 00 595

Refer to AIR/KSD2

Wheel alignment check KDS with ride-height
measurement, without load

Labor Operation:

Labor Allowance:

Description:

32 00 601

Refer to AIR/KSD2

Adjusting toe-in on front axle

Refer to AIR/KSD2

Adjusting rear axle

Refer to AIR/KSD2

Adjusting rear axle and front axle

And, if and as necessary:
Adjusting

Or:
32 00 620
Or:
32 00 630

Refer to AIR/KSD2 for the corresponding flat rate unit (FRU) allowances.

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Other Repairs
If other eligible and covered work is performed as a result of performing “continued diagnosis,” claim this work
with the applicable defect code and the labor operations (including diagnosis) that are listed in the AIR/KSD2.
[ Copyright ©2019 BMW of North America, Inc. ]

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