This service provides a full plug-and-play cloning solution for the Bosch ME5.2.1 engine control unit, used in many European V8 and V12 engines during the late 1990s and early 2000s.

The ME5.2.1 ECU manages fuel injection, ignition timing, VANOS (in BMW), and emissions functions. These units often fail due to moisture, aging internal components, corrupted EEPROM, failed tuning attempts, or simple electronic degradation over time.

Using professional BDM-style bench tools, all operational data from your original ME5.2.1 ECU is extracted and transferred onto your replacement ECU, including:

• EEPROM data

• Flash memory

• Immobilizer/ISN data

• VIN

• Software configuration and coding

• Adaptations when supported

Your replacement ECU becomes a true plug-and-play module, requiring no dealer programming or coding.

⭐ SUPPORTED MANUFACTURERS USING BOSCH ME5.2.1

The ME5.2.1 ECU was used across multiple BMW and Land Rover vehicles equipped with BMW-derived V8 engines.

BMW (M62 V8 Engines)

Found in early M62 and M62B44 engines:

BMW 5-Series (E39)

• 540i (early models, pre-ME7)

BMW 7-Series (E38)

• 740i / 740iL (pre-1999 builds using ME5.2.1)

BMW 8-Series (E31)

• 840Ci (M62 versions)

LAND ROVER (BMW-Supplied V8 Engines)

When Land Rover used BMW engines:

Range Rover P38 (1995–2002)

• 4.4L V8 (GEMS replaced by Bosch ME5.x in later years)

Note: North American models may use GEMS or Bosch depending on the year; ECU label must confirm ME5.2.1.

OTHER VEHICLES THAT MAY USE ME5.2.x VARIANTS

(Market-dependent)

• Morgan V8 models

• Alpina V8 conversions

• Early standalone conversions for M62 engines

If the ECU tag includes ME5.2.1, this listing applies regardless of the vehicle.

WHAT YOU NEED TO SEND

• Original ME5.2.1 ECU

• Replacement ECU (new or used)

• A note including:

  • Name

  • Phone number

  • Return shipping address

  • Vehicle year/make/model

WHAT’S INCLUDED

• EEPROM + flash memory cloning

• Immobilizer/ISN sync

• VIN + coding transfer

• Flash/EEPROM corruption scan

• Bench communication check

• Final plug-and-play preparation

TURNAROUND TIME

• 1–2 business days

• Same-day rush available