Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
MED 9.2.1 Engine Management System: Notes
Model: E66 - 760Li
Production Date: MY 2003
Manufacturer: Bosch
Pin Connector: 134 Pins - 5 Modular Connectors per Control Module
This intent of this article is to assist you with diagnosis and testing in addition to the detailed information found in the latest Diagnosis and TIS of the DISplus/GT1.
This section will be instructor led for a brief review of the MED 9.2.1 Engine Management System. You are encouraged to use this workbook with the latest Diagnosis and TIS information to make notes during diagnosis and testing of the new/unique components of the MED 9.2.1 system . This will be valuable to you as supplementary information or a memory refresher when performing diagnosis in the future.
For additional and updated information, always refer to:
www.bmwcenternet.com
- Diagnosis and TIS information/updates
- Service Information Bulletins
- DCS messages
Objectives:
After completion of this module you will be able to test and diagnose the following:
- Integrated Voltage Supply Module
- Local-CAN bus
- Auxiliary Air Flaps
- Intake Manifold Pressure Sensors
- High Pressure Injection System
- Direct Injection System Control
- Bosch LSU Planar Wideband Oxygen Sensor
- Exhaust Flap
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.