Electronic Car Parts – ECUs, ABS, TCU and Body Modules
Car Control Units and Modules Matched by Part Number
Auto24Parts supplies original electronic car parts for passenger cars and vans, mostly used and some new: engine control units (ECU), ABS pumps and ABS/ESP control units, transmission control units (TCU), BCM and BSI body modules, instrument clusters, throttle bodies and accelerator pedals.
Product names include the numbers from the label, so the fastest way to find a part is to type the full OEM number or the electronics manufacturer number (Bosch, ATE, Siemens, Magneti Marelli and others) into the search bar. The car model and year alone are rarely enough to match electronics.
Go to: engine control units · complete ABS pumps · ABS / ESP / ASR control units · transmission control units · BCM / BSI modules · instrument clusters · throttle bodies · accelerator pedals
Not sure which part fits? Send us a photo of the original module label – we will check the numbers for you.
List of products
Which category do you need? Types of automotive electronics
Each group of parts has its own category, and most are further divided by car make. Use the table to pick the right group and see which numbers to compare.
| Part | What it does | What to compare |
|---|---|---|
| Engine control unit (ECU, ECM, DME, DDE) | fuel injection, ignition, boost, throttle control, communication with other modules | OEM number, ECU manufacturer number, controller family, HW/SW |
| Complete ABS pump | hydraulic block with pump motor, valves and the ABS/ESP control unit | OEM number, plus the hydraulic unit and control unit numbers separately |
| ABS / ESP / ASR control unit | the electronics only, where the system allows it to be replaced separately | control unit number and OEM number |
| Transmission control unit TCU / TCM | gear shifting in automatic and automated gearboxes | module number, OEM number, gearbox type |
| BCM, BSI, SAM and comfort modules | central locking, lighting, windows, power distribution, in some cars the immobiliser | OEM number, manufacturer number, equipment version |
| Instrument cluster | driver information, in some cars part of the immobiliser system | cluster number, version (e.g. petrol/diesel, gearbox) |
| Electronic throttle body | controls intake air on command from the ECU | OEM number and throttle body manufacturer number |
| Accelerator pedal / pedal sensor | sends the pedal position to the ECU | pedal number and sensor number |
How to match an electronic part – 4 steps
The same car model can use several different control units depending on the engine, gearbox, equipment and production period. The most reliable basis for matching is the full number on the label of the original part.
- Take a photo of the whole label on the removed part, with every number readable.
- Search for the vehicle OEM number including the suffix letter, which often marks a different version.
- Compare the electronics manufacturer number (Bosch, ATE, Siemens, Continental, Delphi, Magneti Marelli), the controller family (e.g. EDC16, MJD, IAW) and HW/SW. On ABS pumps, check the hydraulic unit and control unit numbers separately.
- Check the preparation variant given in the product name or description, and whether coding will be needed after fitting.
A VIN helps confirm the application, but for used electronics it does not replace the numbers on the label. A similar housing or a matching start of the number does not prove interchangeability.
Reading the label – examples from our stock
A module usually carries several numbers: the car maker's, the electronics manufacturer's and the controller family. The examples below are products available in our shop. A prefix helps identify the type of part, but on its own it does not confirm compatibility.
| Product | What the numbers mean |
|---|---|
| ABS pump Audi / VW / Seat / Skoda 1J0614117G 1C0907379L | In VAG numbers, group 614 is the hydraulic assembly and 907 is the control unit. The ATE references 10020600774 (hydraulics) and 10096003343 (electronics) are listed alongside. |
| ABS pump Alfa Romeo 156 0265216401 46513088 0273004383 | Bosch 0 265 216… is the hydraulic unit, 0 273 004… is the ABS control unit, and 46513088 is the Alfa Romeo number. |
| ECU Mercedes-Benz 0281014227 A6461509478 | Bosch 0 281… marks a diesel engine ECU, A6461509478 is the Mercedes-Benz number, and CR3.31 is the controller designation on the label. |
| ECU Alfa Romeo GTV 0261206061 | Bosch 0 261… marks a petrol engine ECU; 00467684720 is the Alfa Romeo reference. |
| ECU VW Golf 1.6 036906034BH IAW4MV.F IMMO OFF | IAW4MV.F is a Magneti Marelli controller family, 036906034BH is the VAG number, and IMMO OFF is the preparation variant of this unit. |
| ECU VW Polo 1.6 TDI 5WP42856AA 03L906023EP | 5WP… is a Continental number and 03L906023EP is the VAG number. Compare both in full, including the suffix. |
| Throttle body Audi A4 A6 078133062C 0280750003 | Bosch 0 280… covers throttle bodies and injection components; 078133062C is the Audi number. |
For more on each manufacturer's numbering, see the Bosch, ATE, Siemens and Magneti Marelli pages.
Does used electronics need programming?
It depends on the module and the car. Many control units store data from the previous vehicle: VIN, configuration or immobiliser data. After fitting, coding, adaptation or a data transfer may be required. Other parts, such as many throttle bodies and accelerator pedals, usually need none of this. A part is Plug & Play only when the listing says so.
Engine control units are available in three main options:
- Locked ECU – for programming by a workshop,
- Unlocked ECU – in one of these variants: with PIN code / CAR PASS, Virgin, IMMO OFF, Auto Programming or a clone of your original ECU,
- Full set – the ECU together with the matching immobiliser parts.
Not every ECU number can be prepared in every variant. Cloning requires your original unit, and preparation may add about 1–2 business days. Details are on the locked and unlocked ECU options page.
Before you buy a module – confirm the cause of the fault
An ABS warning light, limp mode or no communication with a diagnostic tool does not always mean the control unit has failed. Similar symptoms can come from:
- missing power or ground, a blown fuse or a faulty relay,
- a corroded or damp connector, damaged wiring,
- sensors, e.g. wheel-speed sensors in the ABS system,
- a CAN or LIN bus fault, or another module on the network.
Modules talk to each other, so a fault in one can store codes in the ECU, ABS, TCU or instrument cluster as well. Our guides explain how to diagnose it: how to check an engine control unit and how to check an ABS pump controller.
Pre-dispatch checks, warranty and delivery
Every part is checked before dispatch to the extent appropriate for its type. Checks may include visual inspection, connector inspection, diagnostic communication, data reading or a functional test.
Warranty: 6 months on used parts unless stated otherwise; 12 months or the manufacturer's period on new parts.
Returns: consumers have 14 days from delivery. Services carried out to order (IMMO OFF, Virgin, cloning, programming) cannot be returned.
Seals: the connector seal may break when the part is fitted and does not cancel the warranty. Housing seals must stay intact.
Delivery: we ship within Poland, across the EU and worldwide.
More information: warranty and returns, shipping and delivery, payment methods, how to buy.
Can't find your part number?
Send us a photo of the whole label on the original part, plus the make, model, year and engine version. We will check compatibility, availability and the preparation options.
Frequently asked questions about electronic car parts
Q: Are the car model and year enough to find the right part?
Not always. The same model can use different control units depending on the engine, gearbox and equipment. The full number on the original part is a more reliable basis.
Q: Is a matching Bosch number or OEM number enough?
It is best to compare both, including the suffix. On ABS pumps, also check the hydraulic unit and control unit numbers separately.
Q: What is the difference between an ABS pump and an ABS control unit?
The control unit is the electronics only. A complete pump also includes the hydraulic block, pump motor and valves. You can buy the control unit separately only if the system allows it to be replaced on its own.
Q: Does every used ECU need programming?
No. It depends on the module and the car. Some units need coding, adaptation or a data transfer, others do not. Plug & Play applies only where the listing states it.
Q: Is a Virgin ECU the same as IMMO OFF?
No. A Virgin ECU has been wiped and must be programmed to the car. An IMMO OFF ECU has the immobiliser function disabled and is available only for selected ECU numbers.
Q: Do used BSI, BCM modules or instrument clusters need coding?
In many cars, yes, because these modules can store configuration, VIN or immobiliser data. Requirements depend on the specific system and part number.
Q: Does no communication with the diagnostic tool mean the module is faulty?
Not always. The cause can be missing power or ground, a fuse, a connector, wiring or a CAN or LIN network fault.
Q: What warranty do electronic parts have?
6 months on used parts unless stated otherwise, and 12 months or the manufacturer's period on new parts. The warranty does not limit consumers' statutory rights.
Q: What should I send to check compatibility?
A clear photo of the whole label on the original part, plus the make, model, year and engine version. If the numbers are hard to read, add photos of the housing and connectors.