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SI B52 02 17
Seats

March 2017
Technical Service

SERVICE ACTION: CHECK PUMP FOR BACKREST
WIDTH ADJUSTMENT
Please perform the procedure outlined in this Service Information on all affected vehicles before
customer delivery. In the event the customer has already taken delivery of the vehicle, please
perform the procedure the next time the vehicle is in the shop.

MODEL
F80 (M3 Sedan)

F82 (M4 Coupe)

AFFECTED VEHICLES
Vehicles which require this Service Action to be completed will show it as “Open” when checked
either in AIR, the "Service Menu" of DCSnet (Dealer Communication System) or with the Key
Reader.

SITUATION
The backrest width adjustment and, the lumbar support adjustment of the front seats (vehicles
without option code 7MA: Competition package) are accomplished by a common air pump.
There may be a decrease in pressure in the door-side backrest and /or the lumbar support without
any user input.

CAUSE
The plug connection between the air pump and the door-side backrest width adjustment or the
bottom lumbar support may be leaking.

CORRECTION
z

Check system on both front seats for tightness and no leak found.

z

Check system on both front seats and found driver’s side or/and passenger’s side (s) leak,
replace air pump for defective side(s).

PROCEDURE
Note: Competition package vehicles have only backrest width adjustment - no lumbar
support adjustment.

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Electrical adjustment seat

Competition seat with option code 7MA

Check system on both front seats for tightness:

Note: The initial pressure check as described in steps 1-6 can be performed in the
parking lot since the vehicle will sit for at least an hour.
1. Switch on ignition.
2. Inflate backrest width adjustment and lumbar support of both front seats to the maximum.
3. Switch off ignition.
4. Leave the vehicle stand for 1 hour.
5. Switch on ignition (after 1 hour).
6. Check the previously fully-inflated door-side backrest width adjustment and lumbar support
(if equipped) for leaks.
a. Place hand on the door side backrest adjustment and re-inflate.
Did the cushion rise again?
YES – a leak is present and air pump needs to be replaced. Follow replacement procedure
specified below.
NO – continue with next step.
b. Place hand on lumbar support and re-inflate.
Did the cushion rise again?
YES – a leak is present and air pump needs to be replaced. Follow replacement procedure
specified below.

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NO – continue with next step.
c. Repeat this step on other side front seat.
7. If no leak was found, let car sit for 4 hours and repeat step 6.
REPLACEMENT
To replace the backrest width adjustment / lumbar support pump follow repair instructions (see
Note on competition seat below):
z

REP 52 15 001 “Removing and installing front seat, driver's side”

z

REP 52 15 002 “Removing and installing front seat, passenger's”

z

REP 52 15 115 “Replacing lumbar support pump (with valve block) on left”

z

REP 52 15 117 “Replacing right lumbar support pump (with valve block)”

Note on Competition Seat

Both the lines are not required, the competition seat
does not have lumbar support, when replacing the air
pump. The unused lines have to be cut off using a
suitable tool.
Pay careful attention to the correct line colors
when cutting off.
Use the removed part as a reference; see image.

Tie the unused connector for the lumbar support switch
back as seen in image on left.

8. Reinstall the seat (s)
9. Replace 4 fillister-head screws in affected seat with tightening torque: 42Nm.

PARTS INFORMATION
For F80

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Part Number

Description

Quantity

52 10 8 058 229

Pump with left valve

1

52 10 8 058 228

Pump with right valve

1

Part Number

Description

Quantity

52 10 8 058 249

Pump with left valve

1

52 10 8 058 254

Pump with right valve

1

For F82

And:

07 14 9 321 690

Fillister-head screw

4 or 8

WARRANTY INFORMATION
Reimbursement for this Service Action will be via normal claim entry utilizing the following
information:

Defect Code:

0052790100

No repair is necessary

Labor Operation:

Labor Allowance:

Description:

00 64 829

3 FRU

Checking if the backrest width
adjustment pumps is working (No
repair is necessary) (Plus work)

Labor Operation:

Labor Allowance:

Description:

00 64 830

12 FRU

Checking backrest width adjustment
pumps and replacing front seat pump,
left or right (Plus work)

Or:
Repairing One Side

Or for:
Vehicles with OE 07MA: Competition package

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Labor Operation:

00 64 832

Labor Allowance:

Description:

16 FRU

Checking backrest width adjustment
pumps and replacing front seat pump,
left or right (with OE 07MA:
Competition package) (Plus work)

Labor Allowance:

Description:

22 FRU

Checking backrest width adjustment
pumps and replacing pumps of both
front seats (Plus work)

Or:
Repairing Both Sides

Labor Operation:
00 64 831

Or for:
Vehicles with OE 07MA: Competition package

Labor Operation:

00 64 833

Labor Allowance:

Description:

30 FRU

Checking backrest width adjustment
pumps and replacing pumps of both
front seats (with OE 07MA:
Competition package) (Plus work)

ATTACHMENTS
View PDF attachment Service Action - 0052790100 F80 F82 Pump Backrest Width
Adjustment.
[ Copyright ©2017 BMW of North America, Inc. ]

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