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 0.8 CDI 0281013346 A6601531079001
Vendors's code: 0281013346
Product code: 2149-880C3
Barcode:
Code 39:
ISBN:
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
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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.
How do you choose the right engine control unit for a Smart?
A used engine control unit in working order and in good condition for Smart - numbers 0 281 013 346 / 0281013346; A6601531079 001 / A6601531079001. The numbers are listed below, and if you have any questions about the fit, write to us.
Engine control unit for Smart
A used engine control unit lets you carry out the repair without buying a new, expensive part. This listing is for the Smart 0.8 CDI, and this unit is in working order and in good condition.
Part numbers in this listing
- 0 281 013 346 / 0281013346 - manufacturer's number - Bosch
- A6601531079 001 / A6601531079001 - another number from the listing
Car and engine according to the listing
- Smart - model
- 0.8 CDI - engine according to the listing
- Bosch - manufacturer
The role of the control unit in the engine
Control unit damage can result from water ingress, a voltage surge or wear of the electronic components. The symptoms may be constant or appear intermittently.
How to match this part
Our range also includes other control units for this model and engine, with different numbers. Choose by the number on the module, not by the model alone. The numbers given come from our listing; always compare them with the markings on your control unit.
Locked and unlocked variants
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. In the unlocked variant, we prepare the module before dispatch - this usually takes 1-2 working days. 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. If in doubt, ask us before ordering. Read about the variants: locked and unlocked explained.
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.
Bear in mind that after replacement the control unit may need coding or adaptation - check this for your model.
Frequently asked questions
| What condition is this part in? |
|---|
| It is a used part, in working order and in good condition. You will find the warranty period in the product features table. |
| What is the difference between the locked and the unlocked variant? |
| A locked unit holds the previous car's data and immobiliser coding, while an unlocked one is prepared by us before dispatch. You will find a description on our ECU preparation options page. |
| 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. |
Send a photo of your control unit or its number to contact@auto24parts.com and we will confirm whether this part will fit.