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SI B12 33 14
Engine Electrical Systems

February 2016
Technical Service

This Service Information bulletin supersedes SI 12 33 14 dated December 2015.
SUBJECT

Fault Code 1D2008 Stored in DME
MODEL

F22 (2 Series)
F25 (X3)
F26 (X4)
F30 (3 Series Sedan)
F32 (4 Series Coupe)
F33 (4 Series Convertible)
F34 (3 Series Gran Turismo)
F36 (4 Series Gran Turismo)
With automatic transmission
SITUATION

The Service Engine Soon light is on. Fault Code 1D2008: Map thermostat: jammed open is stored
in the DME. There may also be a complaint of low heat output with lower outside temperatures.
CAUSE

During the engine warm-up, the engine coolant does not reach operating temperature within the
DME’s allowable time limits.
This is caused by either a faulty thermostat inside the transmission oil heat exchanger or a faulty
engine characteristic map thermostat.
PROCEDURE

Note: The following checking procedure must be performed on a cold engine.

Remove the front underbody
protection panel (tightening torque of
screws is 3Nm) to access the cooling
lines to the transmission oil heat

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exchanger (1).
(Note: All illustrations were taken on
an F30 328xi N20).

Clamp off the outflow hose (1) on the
cooler with special tool 81 64 2 184
117 (SI B04 07 11). The outflow hose
is the softer (rubber) of the two cooling
lines on the heat exchanger.

After clamping, remove the outflow
hose from the heat exchanger (1).

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Loosen the cap on the coolant
expansion tank (1).

If any coolant starts leaking out of
the transmission heat exchanger (1),
the internal thermostat is jammed and
the heat exchanger will need to be
replaced.
Follow Repair Instruction RA 17 22
010, “Removing and
installing/replacing transmission oil
cooler for automatic transmission
(N20, N26, N55).”

A TC PuMA case is no longer needed for parts replacement authorization.
If there is no coolant loss out of the heat exchanger, replace the engine coolant thermostat.
Follow Repair Instruction RA 11 53 000, “Removing and installing/replacing coolant thermostat.”
PARTS INFORMATION

Part Number

Description

Quantity

17 21 7 600 553

Heat exchanger
(transmission 2,3 or 4
Series)

1*

17 21 7 593 856

Heat exchanger
(transmission X3 and
X4)

1*

Or:

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11 53 8 635 689
11 53 7 598 865
11 53 7 586 784

Thermostat (N20, N26)

1*

Thermostat (N55)

1*

Thermostat (N55) (X3
and X4)

1*

* If needed
WARRANTY INFORMATION

Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light
Trucks or the BMW Certified Pre-Owned Program.
Defect Code:

17 21 01 48 00

Heat exchanger, automatic
transmission

Labor Operation:

Labor Allowance:

Description:

Refer to KSD2

Replacing heat exchanger for automatic
transmission (Includes 00 11 237/500:
checking/topping up automatic
transmission fluid level which includes
performing a Vehicle Test and charging
the battery)

4 FRU

Work time for checking the function of
the thermostat in the transmission heat
exchanger

17 22 010

And:
17 99 000

If you are using a Main labor code for another repair, use the Plus code labor operation 17 22 510
instead.
And, as needed:
Sublet – Bulk Materials

Sublet Code 4

Reimbursement for the used quantity of
transmission fluid (Bulk container
See sublet reimbursement reference P/N 83 22 2 220 439 for 20
calculation below
liters or P/N 83 22 2 220 443 for one
liter). Please do not use these part
numbers for claim submission.

Sublet calculation: Reimbursement for used quantities of transmission fluid (P/N 83 22 2 220 439
for 20 liters or P/N 83 22 2 220 443 for one liter) at dealer net plus handling.
Enter this material cost in sublet and itemize the amount in the claim comment section.

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Or:
Defect Code:

11 53 12 96 00

Characteristic map thermostat

Labor Operation:

Labor Allowance:

Description:

00 00 006

Refer to KSD2

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

Refer to KSD2

Connect an approved battery
charger/power supply

4 FRU

Checking the function of the thermostat
in the transmission heat exchanger

Refer to KSD2

Replacing coolant thermostat

And:
61 21 528
(indicated in KSD2 as
Charging battery)
And
17 99 000
And:
11 53 500

If you are using a Main labor code for another repair, use the Plus code labor operation 00 00 556
instead.
And, as needed:
Sublet – Bulk Materials

Sublet Code 4

See sublet
reimbursement
calculation below

Reimbursement for replacing the drained
quantity of antifreeze/coolant (bulk
container reference BMW P/N 82 14 1
467 704, one gallon container. Please do
not use this part number for claim
submission.)

Sublet calculation: BMW antifreeze/coolant (1 gallon bulk container reference P/N 82 14 1 467
704) for approximately 1 liter that is needed for this repair (50/50 mixture) at dealer net plus
handling.
Enter this material cost in sublet and itemize the amount in the claim comment section.
Refer to KSD2 for the corresponding flat rate unit (FRU) allowance.
Labor operation code 17 99 000 is not considered a Main labor operation. Also, since the “work

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time” FRU allowance to be claimed is specified, a separate punch time is not required
[ Copyright ©2016 BMW of North America, Inc. ]

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