![[B] Bentley Publishers — Automotive Reference](https://bentleypubs.com/wp-content/themes/bentleypubs/images/bp-banner-234x60-bookblue.svg)
On-board computer retrofit for 1999 - 2005 3 series (E46)
BMW 3 Series · 1999–2005
Abstract: How to retrofit an on-board computer system to non equipped models
Applies to: BMW 3 Series 1999-2005 - 6 cylinder models (platform: E46)
On-board computer, retrofit
In this article we will replace the standard (w/o on-board computer) directional stalk with an On-board computer stalk and then reprogram the instrument cluster using a factory scan tool to access the on board features.
- remove air bag
Airbags are pyrotechnic explosive devices. Proper removal procedures must be followed when servicing these systems. Use car when working on vehicles fitted with airbags.
- remove steering wheel
- remove clock spring
- remove and replace directional stalk with part #61 31 8 363 668
- reinstall in reverse order
- enter coding program funtion with GT-1 or equivalent. We will show the procedure with a GT-1.
- Following images show each screen shots of retrofit procedure using BMW GT1 scan tool.
- Once complete with on-screen direction retrofit is complete.
You should now have option on instrument cluster to view
- temperature
- MPG
- Time
contact us |
about us |
customer service |
videos |
catalog PDF |
Bentley Publishers |
Linnaean Press
Facebook · 
YouTubeBentley Publishers, Cambridge MA 02138-1804 USA © 2026 Robert Bentley, Inc. All rights reserved. Bentley Publishers, BentleyPubs, and Linnaean Press are trademarks of Robert Bentley, Inc. Website by The Information Foundry.
pubs-wp r1 v002 · 2026-10-06