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 Smart 1.5 CDI 0281011840 A6391500579
Vendors's code: 0281011840
Product code: 068D-9743E
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
In stock
Select a product option:
Individual variants may differ in price
product option
Important: Depending on the ECU type and vehicle model, not all of the options listed below may be available.
To select the correct option for your vehicle and ECU, please contact us before purchasing:
contact@auto24parts.com
1. Locked
This option is intended for professional workshops with the required specialist equipment and technical knowledge.
The ECU has been removed from a vehicle intended for recycling and still contains the immobilizer data and other information from the previous vehicle. Before it can be used in another car, it must be unlocked and then programmed using specialist automotive diagnostic equipment.
2. Unlocked
Several preparation methods may be available. The possible options depend on the ECU type, vehicle model and immobilizer system. Please contact us before purchasing, as some preparation methods are not available for every ECU.
Our electronics specialists can prepare the ECU in one of the following ways:
a) ECU with PIN code (Car Pass)
The PIN code is supplied, but programming with a suitable diagnostic tool is still required. After installing the ECU, it must be reset using the supplied PIN code and then programmed to the vehicle’s immobilizer system.
b) VIRGIN ECU
The data from the previous vehicle is removed and the ECU is restored to a clean, factory-like state. After installation, it must be programmed to the vehicle using a compatible specialist diagnostic tool. Unless another preparation method is specified in the product description, this is the standard unlocking option for most of our ECUs.
c) Plug & Play – IMMO OFF
The immobilizer function is disabled in the ECU. After installation, the engine can start without additional immobilizer programming. Please note that the vehicle will no longer have an active immobilizer function, and an immobilizer warning light or fault code may remain, depending on the vehicle model.
d) Plug & Play – Automatic Programming
After installation, the ECU automatically learns and saves the required vehicle data. No additional programming is normally required.
e) Plug & Play – 1:1 Clone
The data from your original ECU is copied to another fully functional ECU. The cloned unit is then ready for installation without additional programming.
You must send us your original ECU so that we can transfer its data to the replacement unit.
The original ECU must have working communication with the vehicle, a diagnostic tool or our programming equipment. If the required data cannot be read, a complete 1:1 clone may not be possible.
3. Complete Plug & Play Set
A complete matched set containing the ECU, immobilizer components and all other parts required to start the vehicle without additional programming. All components supplied in the set must be installed in the vehicle.
Important:
Dispatch time depends on the selected option. If an unlocked or specially prepared version is ordered, the preparation service usually requires an additional 1–2 business days.
Ask about the product
Engine control unit Smart 1.5 CDI 0281011840 A6391500579
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Shipping
from
€30.00
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shipping
(Poland)
from
€30.00
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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.
Will the control unit with number 0281011840 fit your car?
An engine control unit in working order for Smart - numbers 0 281 011 840 / 0281011840; A 639 150 05 79 / A6391500579, a used part in good condition. The numbers on the label decide the match, so compare them with those on your own control unit.
Engine control unit for Smart
When the engine in a Smart 1.5 CDI runs unevenly or will not start, and diagnostics point to the control unit, replacing it with a used module in working order can be the cheapest solution. This unit is in good condition.
Part numbers in this listing
- 0 281 011 840 / 0281011840 - manufacturer's number - Bosch
- A 639 150 05 79 / A6391500579 - part number (OEM / vehicle)
- PMN902176 - additional part number
Car and engine according to the listing
- Smart - model
- 1.5 CDI - engine according to the listing
- Bosch - manufacturer
The role of the control unit in the engine
The control unit communicates with the car's other modules over the CAN bus, including the ABS, the gearbox and the instrument cluster. That is why the software version and the hardware number matter when matching. After replacement, the module usually has to be matched to the car, and in some cars it also needs coding or adaptation.
Locked or unlocked variant?
A locked control unit keeps the previous car's data and immobiliser coding, so it is intended for garages that will unlock, program and match it to the vehicle themselves. We prepare an unlocked control unit before dispatch (approx. 1-2 working days), so you do not have to do it yourself. Not every unlocking method (PIN / CAR PASS, Virgin, IMMO OFF, auto-programming, cloning) is available for every control unit - it depends on the number, software and immobiliser. You can also read our guide to engine control unit variants or ask us about your particular case.
Fitment
Number 0 281 011 840 also appears in another listing. Compare all the numbers with the label on your control unit - we do not assume that different listings are interchangeable. Versions differ in areas such as engine power, gearbox and equipment, so even similar numbers do not always indicate the same module.
Symptoms of a faulty control unit
- an engine fault appears after the battery has been replaced,
- the control unit's supply voltage is unstable,
- power drops once the car has warmed up,
- the engine goes into limp mode for no obvious reason.
Compare all the numbers with the label on your control unit, as the same engine may have been fitted with several versions of the module.
Frequently asked questions
| What does 'used, in working order' mean? |
|---|
| We sell it as a used part in working order and in good condition; the warranty period is given in the features of this listing. |
| What should I check on delivery? |
| Check that the numbers match the description and that the connectors and housing show no cracks or signs of corrosion. |
| Does the control unit need coding after replacement? |
| That depends on the make, model and version. The module usually has to be matched to the car, especially when it works with the immobiliser. |
Send questions about the fit to contact@auto24parts.com - include the model, year, engine and the number on the module.
