A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Engine control unit BMW Bosch 1277022368
Vendors's code: 1277022368
Product code: 55DD-687AF
Barcode:
Code 39:
ISBN:
€243.90
Price
€243.90
€300.00
Price
€300.00
Ask about the product
Engine control unit BMW Bosch 1277022368
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Shipping
from
€30.00
-
shipping
(Poland)
from
€30.00
-
shipping
(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
Shipping cost for the selected product
The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
When is engine control unit 1277022368 the right choice for BMW?
Engine control unit 1277022368, used and inspected. Compare the numbers with the original in your car.
Is engine control unit 1277022368 the right part for your BMW?
This control unit is made by Bosch. Engine control unit 1277022368 is used and original, and it is matched by its numbers, not by the car model alone. The listing does not state the car model or year, so we do not give them in the description and match the part by its numbers.
Where to find the numbers on an engine control unit
The numbers from the listing, as written on the labels and as a single string:
- 1277022368, control unit manufacturer's number.
Matching by number is more reliable than matching by car model. Compare all the numbers and ask us if any of them does not match.
Control unit variant
This listing is for a control unit in the following variant(s): Locked / Unlocked. We describe the differences between the variants (locked, unlocked, Virgin, IMMO OFF, Plug and Play, clone, full set) on the ECU preparation options page. Before buying, send us the numbers from the label and we will confirm which variant is available for that number.
Faults that call for checking the control unit
- the car loses power or goes into limp mode,
- the radiator fan or other electrical components do not work properly,
- faults appear and disappear, usually once the engine has warmed up,
- starting is blocked by the immobiliser after the electronics have been replaced or repaired.
First check the battery, fuses and wiring, because a faulty control unit has to be distinguished from an ordinary fault in the electrical system. Fitting and configuration are best left to a garage with suitable equipment.
Questions and answers
| Can I send a photo for a compatibility check? |
|---|
| Yes. Contact us and send a photo of the label on the original control unit, and we will help you check whether this part will fit. |
| Who makes this control unit? |
| The control unit is made by Bosch. The manufacturer's name does not change the numbers you should use to match the part. |
| What should I do if the ending of my number is different? |
| The ending of a number often indicates a different version of the control unit, so do not order the part without confirmation. Send us the number from the label on your control unit. |
| What is the condition of this control unit? |
| It is an original recycled part in good condition, checked by us. Warranty details are in the product features table. |
Not certain this is the right control unit? Send us the numbers from the label on your control unit and we will help you compare them.
