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 Fortwo 0.6 0261205004 0003107V006
Vendors's code: 0261205004
Product code: CA25-767D8
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
Engine control unit Smart Fortwo 0.6 0261205004 0003107V006
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€30.00
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(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.
Control unit number 0261205004 - is this the right part?
A used engine control unit in working order and in good condition for the Smart Fortwo - numbers 0 261 205 004 / 0261205004; 000 3107 V006 / 0003107V006. The numbers are listed below, and if you have any questions about the fit, write to us.
Engine control unit for Smart Fortwo
This engine control unit is intended for the Smart Fortwo 0.6. It is a used part, in working order and in good technical condition.
Numbers to compare
- 0 261 205 004 / 0261205004 - manufacturer's number (Bosch)
- 000 3107 V006 / 0003107V006 - OEM / vehicle number
Application according to the listing
- Smart Fortwo - model
- 0.6 - engine according to the listing
- Bosch - manufacturer
The role of the control unit in the engine
The module contains memory with the software and engine data, and in some cars also the immobiliser data. That is why the software version matters alongside the part number. Damage can result from water ingress, a voltage surge or wear of the electronic components, and it can show up intermittently.
How to match this part
Compare number 0 261 205 004 in full with the number on your control unit. Different versions were fitted to the same models, so it is the number that decides the match, not the model alone. The same engine type was sometimes controlled by different module versions, so the number decides the match first, and only then the model and year.
Symptoms of a faulty control unit
- hard starting when the engine is cold,
- smoke from the exhaust and rough running,
- misfire faults stored in the diagnostic memory,
- no response to the accelerator pedal.
Before you buy a control unit, check the fuses, power supply, earth and sensors - a damaged wiring loom or crankshaft position sensor can also cause similar symptoms.
Locked or unlocked variant?
A locked control unit is sold with the previous vehicle's data - this is an option for workshops that can unlock and program it. 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. You can also read our guide to engine control unit variants or ask us about your particular case.
Frequently asked questions
| Is the part new? |
|---|
| The control unit is used, but in working order. The warranty is stated in the product features. |
| Why is the number written in several ways? |
| The same number may be written with spaces, with hyphens or as a single string. We give it in two forms to make it easier to find. |
| Where can I find the number on the control unit? |
| You will usually find the numbers on the label or the housing of the module, visible once it has been removed from the car. If you cannot read them, send us a photo. |
Write to contact@auto24parts.com with the model, year and the number from your control unit - we will check the fit.
