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 451 1.0 0261201385 A1321532679
Vendors's code: 0261201385
Product code: B96E-9770C
Barcode:
Code 39:
ISBN:
€284.55
Price
€284.55
€350.00
Price
€350.00
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 451 1.0 0261201385 A1321532679
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Shipping
from
€30.00
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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.
Does this engine control unit fit the Smart 451?
We offer a used engine control unit for the Smart 451 - numbers 0 261 201 385 / 0261201385; A1321532679; it is in working order and in good condition. Check the numbers against your own module before ordering.
Engine control unit for Smart 451
The engine computer is one of the key modules in a car - it determines the amount of fuel, the ignition timing and how the engine runs both cold and hot. The unit on offer is for the Smart 451 1.0; it is used, in working order and in good condition.
How this control unit is labelled
- 0 261 201 385 / 0261201385 - Bosch number (manufacturer)
- A1321532679 - OEM / vehicle number
Vehicle data from the listing
- Smart 451 - model
- 1.0 - engine according to the listing
- Bosch - manufacturer
What an engine control unit does
The same car model may have had several control unit versions, depending on the engine, power output and year. The numbers in the list let you tell these versions apart. The module stores fault codes which, once a diagnostic tool is connected, help to establish whether the sensors, the wiring or the control unit itself is to blame.
Locked and unlocked variants
A locked control unit is sold with the previous vehicle's data - this is an option for workshops that can unlock and program it. If you prefer a module that is already prepared, choose the unlocked variant - we prepare it before dispatch in about 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. See our ECU preparation options and contact us before buying.
How to match this part
Compare number 0 261 201 385 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. Before buying, compare all the numbers with the label on your control unit, both with spaces and as a single string.
Symptoms of a faulty control unit
- the engine warning light is on straight after the ignition is switched on,
- the diagnostic tester cannot connect to the control unit,
- engine speed is displayed incorrectly,
- the system works intermittently.
Before buying, make sure the cause is not the power supply or the wiring loom, and only then replace the module.
Questions and answers
| What condition is this part in? |
|---|
| This is a used part in working order and in good condition. Warranty details are given in the features of this listing. |
| 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. |
| Can I order an unlocked control unit? |
| Yes, you choose the variant in the listing. Whether an unlocking method is available depends on the number and software, so if in doubt, ask us before buying. |
Not sure? Write to contact@auto24parts.com and we will help you choose the right control unit for your car.
