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SI M11 10 16
Engine

August 2016
Technical Service

THERMOSTAT FAULTS (B-ENGINES)
MODEL

F54 (Cooper /
Cooper S Clubman)

F55 (Cooper /
Cooper S hardtop 4
door)

F56 (Cooper /
Cooper S hardtop 2
door)

F57 (Cooper / Cooper
S Convertible)

With B36, B38, B46
and B48 engines
SITUATION

The Service Engine Soon light is on. A Check Control message for “Engine overheated” and or
“Exercise caution!” may also display.
The following fault codes may be stored in the DME:
z

1D2401 - Characteristic map thermostat, actuation: Short circuit to B+

z

1D2402 - Characteristic map thermostat, actuation: Short circuit to ground

z

1D2404 - Characteristic map thermostat, actuation: Line disconnection

During diagnosis the coolant may be found to be discolored.
CAUSE

Insulation on the wiring for the map activation thermostat (heating element) may be damaged.
Exposed wiring may allow coolant to enter the harness. This may cause damage to the heating
element.
CORRECTION

Follow Repair Instruction 11 16 550 “Removing and installing alternator bracket” (B48A, B46A).
Remove the alternator bracket (water pump and thermostat are bolted to the bracket) and remove
the water pump/thermostat to check for corrosion or signs of electrolysis (electric current
transferring through the coolant to aluminum bracket).
Refer to the attachment “Inspecting the thermostat.pdf” for identifying a failed map thermostat.
z

If there are no signs of corrosion or electrolysis of the coolant and thermostat, only replace
the thermostat (alternator bracket with t-stat and water pump).

z

If there are signs of corrosion and electrolysis, replace the engine:
o Submit a TC case to the TC Engine Group for further assistance prior to replacing the
engine.

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PARTS INFORMATION

Part Number

Description

Quantity

11 51 8 601 366*

Water pump, thermostat and
support

1

82 14 0 031 133

MINI Coolant/Antifreeze

As needed

83 19 0 404 517

Loctite 5970 liquid sealer

As needed

*Only needed if there is no contamination in the engine cooling system
WARRANTY INFORMATION

Covered under the terms of the MINI New Passenger Car Limited Warranty or the MINI NEXT
Certified Pre-Owned Limited Warranty.
Defect Code:

11 53 12 96 00

Labor Operation:

Labor Allowance:

Description:

Refer to KSD2

Performing “vehicle test” (with
vehicle diagnosis system –
checking faults) (Main work)

Refer to KSD2

Connect an approved battery
charger/power supply(indicated
in KSD2 as “Charging battery”)

Refer to KSD2

Removing and
installing/replacing the coolant
thermostat

00 00 006
And:
61 21 528
And:
11 53 500
Or:

11 53 700

Removing and
installing/replacing the coolant
thermostat (Coolant already
drained)

If you are using a Main labor code for another repair, use the Plus code labor operation 00 00 556
instead.
Refer to KSD2 for the corresponding flat rate unit (FRU) allowances.
And:
Sublet – Bulk Materials

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Sublet Code 4

See sublet reimbursement
calculation below

Reimbursement for the repairrelated bulk materials (BMW
part number(s), please do not
use the part numbers for claim
submission)

Sublet reimbursement calculation for claiming the “used quantities” of repair-related bulk materials
(BMW part numbers) is at dealer net plus your center’s handling.
MINI Antifreeze/Coolant: Claim the amount needed to replace what was drained with a “50/50
coolant/water solution” at dealer net plus handling (MINI Bulk Part Number)
Enter this material cost in sublet and itemize the amount on the repair order and in claim comment
section.
Consequential Repair(s)
When other or additional work and/or parts are required as a direct result of the issue being
addressed in this bulletin, claim these items under the defect code listed above together the
applicable labor operations listed in KSD2.
Overlapping Labor – Associated and/or Other Repairs
If invoicing KSD2 flat rate labor operation codes for the additional repair work results in
overlapping labor being claimed, please invoice work time labor operation 00 50 000 for the
additional time (FRU) minus the overlap instead.
Work time labor operation code 00 50 000 is not considered a Main labor operation.
On the repair order and in the claim comment section, please identify the labor operations that labor
operation code 00 50 000 replaces and itemize the claimed FRU amount.
Associated Repairs: When work time labor operation 00 50 000 is used as an extension of the
repair outlined in this bulletin, a separate defect code and punch time(s) are not required.
Other Repairs: When work time labor operation 00 50 000 is used for work that will be claimed
under a different defect code, separate punch time(s) are required.
ATTACHMENTS

View PDF attachment M111016 Inspecting the thermostat.
[ Copyright ©2016 BMW of North America, Inc. ]

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