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.
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HOMESERVICE MANUALSBMW1999328I 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMCODING AND PROGRAMMING - OVERVIEWEPROMS & EEPROMSWHEN IS EPROM REPLACEMENT AND/OR PROGRAMMING NECESSARY?NOTES
1999 BMW 328i 2D Convertible, Automatic
When is EPROM Replacement and/or Programming Necessary?: Notes
1999 BMW 328i 2D Convertible, AutomaticSECTION Notes
The program and or data of an engine or transmission control module only needs to be updated or replaced if:
- The control module is replaced with a non programmed/basic module.
- A Service Action, Recall or customer concerns have resulted in the release of a new/updated program or revised operational data.
The programming procedure of the diagnostic equipment will identify if:
- a DME EPROM needs to be replaced or can be updated
- a control module (DME or Transmission) can still be programmed or needs to be replaced if the reprogramming limit of 13 times has been reached
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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.