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 Alfa Romeo 145 146 1.9 JTD Bosch 46784951 0281001936
Vendors's code: 46784951
Product code: 759C-32247
Barcode:
Code 39:
ISBN:
$124.76
Price
$124.76
$153.46
Price
$153.46
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 Alfa Romeo 145 146 1.9 JTD Bosch 46784951 0281001936
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$30.69
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shipping
(Poland)
from
$30.69
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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
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Where to find number 46784951 on Alfa Romeo engine control units?
Used original engine control unit, number 46784951, inspected before sale. Matched by the numbers in the listing.
Where to find number 46784951 on an engine control unit?
This control unit is made by Bosch. Engine control unit 46784951 is used and original, and it is matched by its numbers, not by the car model alone. The listing states that this control unit is for: Alfa Romeo 145 146. Engine given in the listing: 1.9 JTD. The listing also gives the markings C424F930, 28SA4499. They help tell the control unit versions apart, but the full part number is what decides compatibility.
Numbers to compare
Below are the numbers as they appear in the listing, together with the single-string form used in catalogues:
- 46784951, car manufacturer's original number,
- 0281001936, control unit manufacturer's number.
The ending of a number often indicates a different version of the control unit, so compare every character. If you are in doubt, write to us before buying.
When an engine control unit needs replacing
- the engine warning light comes on and does not go out,
- the engine starts and immediately stalls,
- the housing or connector of the control unit shows signs of water ingress or corrosion,
- the engine no longer runs properly after the battery has gone flat.
Similar symptoms also occur with faulty sensors, bad fuel or worn spark or glow plugs, so start with diagnostics and only then replace the electronics.
Questions and answers
| Are the make and model of the car enough to choose the part? |
|---|
| No. A single model comes with different versions of the control unit, depending on the engine, the software version and the equipment. The most reliable reference is the number on the original control unit. |
| What do the markings C424F930, 28SA4499 in the listing mean? |
| They are markings of the version or type of the control unit. They help tell the units apart, but the full part number is what decides compatibility. |
| How should I prepare for fitting the control unit? |
| Disconnect the battery, check the connector and the wiring, and after fitting read and clear the fault codes with a tester. Configuration is best carried out in a garage with suitable equipment. |
| Is this a new part? |
| No. We sell used original control units, each one inspected before sale. You will find the warranty period in the product features table. |
Not sure about the match? Send us a photo of the label on your control unit and we will check whether this part will fit.
