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Bosch MP

Bosch MP Engine ECU: Find and Verify Your Exact Reference

Bosch MP reference not found? Read the markings (ref, HW/SW) and find the right part via our configurator. Request your personalized quote.

1 references availableRepair · Used units · Reprogramming6-month warranty

Bosch MP ECUs belong to a widely distributed Motronic petrol generation, identified on the label by the mention "MP" followed by an index. To order, repair or clone a Bosch MP, it is essential to note the exact reference on the unit and, if necessary, confirm the hardware/software identifiers. Several markings coexist: OEM reference, Bosch number, HW/SW codes, and sometimes internal series. Warning: an ECU from the Bosch MP family is not interchangeable with another variant bearing a different reference—even if it "looks" similar. Below, you will find the method to correctly read each line of information and use the configurator on this page (search by HW/SW ref or by vehicle) to unambiguously identify the part corresponding to your car.

Find your exact reference

Search by hardware reference, software reference or control unit name. Click a result to configure and order without leaving the page.

1 reference

Identify Your Exact Reference

On a Bosch MP, the front label generally groups the Bosch reference, the OEM reference, and HW/SW identifiers. Internal markings (PCB, labels on memories) should not be confused with the commercial reference: they are used to qualify the electronic or software version. In case of a damaged external label, reading the identifiers via diagnostics can help cross-check the information. Then use the configurator above to search by exact reference (Bosch or OEM), by HW/SW code, or, failing that, by vehicle and refine with the recorded markings.

  1. Locate and photograph the unit's label. On many Bosch MPs, there is a white label with the BOSCH logo, a barcode, and several lines of text.
  2. Note the OEM reference. This is the number assigned by the vehicle brand; it differs according to brand/engine and ensures pairing with your harness and immobilizer.
  3. Identify the Bosch number. It often follows a structure like "0 261 xxx xxx" or similar for petrol, and may be accompanied by the "MP" designation (e.g., MPx.x) indicating the Motronic family.
  4. Note the HW/SW indices. The "Hardware" (HW) and "Software" (SW) fields characterize the ECU and its calibration; these identifiers help validate strict equivalence during replacement or cloning.

Differences between external/internal markings: the external label gathers the references useful for ordering. Inside, you may find board silkscreens, a software sticker on a memory, and technical production mentions. These internal notations do not replace the OEM Ref + Bosch No combination for choosing the right part. In case of doubt, use the configurator and enter all readable lines (OEM ref, Bosch No, HW, SW) to obtain the exact match.

Your Options

Pairable Used Unit

We offer pairable used Bosch MP units for your vehicle when the reference is strictly identical to yours.

Repair of Your Unit

We can evaluate and then repair your existing Bosch MP when the fault is electronic and the unit is recoverable.

Remapping / Cloning

We perform cloning or remapping operations on Bosch MP when the VIN/immobilizer pairing needs to be retained.

What to Expect Technically

Bosch MPs belong to a Motronic petrol generation generally using a typical 16-bit microcontroller of that era, with a program memory and a small non-volatile memory (EEPROM) dedicated to identification and immobilizer data. Diagnostic communication is often via a K-line (ISO 9141/14230) on the OBD port, with some later variants possibly coexisting with a CAN network depending on the vehicle architecture. In practice, pairing with the vehicle relies on the VIN/immobilizer association: during replacement, you must either fully transfer the data from your original unit (cloning) or prepare it as "virgin" so that it pairs with the vehicle when the protocol allows.

Indicative symptoms of an ECU failure (non-exhaustive):

  • Random or impossible start despite power supply and crankshaft sensor being in good condition.
  • Unstable idle, unexpected cuts, misfires not related to the distributor/coils.
  • Engine light on with generic faults related to injection/ignition control.
  • Engine fan triggered without reason or relays commanded incoherently.

Compatibility warning: within the Bosch MP family, only the exact reference (OEM ref + Bosch No, completed by HW/SW indices) is suitable. Two units that look similar, or even both bearing the "MP" mention, are not interchangeable if the references differ. The configurator on this page allows you to start either from a vehicle search (e.g., certain PSA group petrol city cars and compacts) or a direct entry of your identifiers. Well-known models have received Bosch MPs depending on engine and year, such as some Peugeot 206, Peugeot 306, Peugeot 106, and Citroën Saxo/Xsara, but the presence and exact index depend on the engine variant; always check your markings.

In terms of interventions, cloning a Bosch MP generally involves reading/writing the area containing immobilizer and identification data (EEPROM and, depending on versions, a program area) to faithfully reproduce your unit on a strictly equivalent donor. "Virginization" may be feasible on certain references when you wish to re-pair the ECU as if it were new. Software (SW) and hardware (HW) data must remain consistent to avoid malfunctions (idle, start, canister/sonde control, etc.). For any Bosch MP repair, replacement, or adaptation project, have clear photos of the label and, if possible, a record of HW/SW identifiers: this speeds up identification and avoids compatibility errors.

Frequently asked questions

How do I know if my Bosch MP ECU is faulty?
Symptoms like erratic starting, unstable idle, engine cuts, and a warning light with non-specific faults may indicate the Bosch MP. Before concluding, check power/ground, key sensors (crankshaft, temperature), and test with a diagnostic tool. If all peripherals are OK, the ECU may be at fault and an evaluation is necessary.
Where can I find the correct reference on a Bosch MP?
On the external label: note the OEM reference, the Bosch number (often in the format 0 261 xxx xxx or similar), then the HW/SW indices. Internal markings (board numbers, sticker on EEPROM) are not sufficient for ordering; they serve to confirm but not replace the OEM + Bosch combination.
Which vehicles are equipped with the Bosch MP ECU?
Bosch MPs are found on certain petrol engines of PSA group vehicles depending on versions, such as Peugeot 206, Peugeot 306, Peugeot 106, and Citroën Saxo/Xsara. The presence and exact index depend on the engine and year; always check your label to confirm.
Can a Bosch MP be cloned without going to the dealer?
Cloning is generally possible by reading and then writing the identification/immobilizer data (EEPROM and, depending on versions, a program area) from a strictly equivalent Bosch MP donor. This allows retaining the pairing and avoiding an immobilizer reprogramming, if the HW/SW references are consistent.
Is a Bosch MP with a different reference but from the same family compatible?
No. The "Bosch MP" family does not guarantee standard exchange between variants. Identical OEM reference and Bosch number, validated by HW/SW indices, are required to ensure compatibility with your harness, sensors/actuators, and immobilizer system.
What is the difference between a repair and a paired used unit for a Bosch MP?
Repair retains your original unit by correcting the electronic fault if repairable. A paired used unit involves finding a strictly identical Bosch MP and then cloning or pairing the unit to the vehicle to retain the immobilizer and appropriate calibration.
How to use the configurator if I only have the HW/SW of my Bosch MP?
First, fill in the HW/SW fields, then refine with the Bosch number or OEM reference if you can retrieve it. If not, start a search by vehicle and then cross-check with your HW/SW identifiers to lock in the exact match.
Do Bosch MPs communicate via K-Line or CAN?
Many Bosch MPs of this generation communicate via K-Line (ISO 9141/14230) through the OBD; some later variants may coexist with a CAN network depending on the vehicle architecture. Check according to the reference and platform concerned.

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