Looking for the V23078-C1002-A303 relay made by Siemens/Tyco?

Sorry, I no longer sell these relays. I am keeping them for repair work. Siemens sold their relay division to Tyco sometime in the early 2000s and then Tyco stopped making them in 2005. Since then they have been getting very difficult to get new unused parts in any significant quantity. Many of the sellers on the internet are selling used parts removed from electronic scrap, so beware.

These relays were commonly used to control electronic motors in automotive applications. They can be found in many electronic modules in BMW, Mercedes and VWs as well as others. BMW used them to control the front windows in BMWs that use the GM4 (ZKE4, GMIV), GM5 (ZKE 5) module. These cars include the E46 (3-series), E85 (Z4), E83 (X3) and E52 (Z8). It is also used in the GM3 (ZKE III) module to control the rear windows and rear door locks. The GM3 is used in the E38 (7-series), the E39 (5-series) and the E52 (X5). It is also used in the Relay Module 4 (RMIV) on E36 3-series. Mercedes also uses this relay in several of their cars including the SLK from the early 2000s.
What's this E-number business? Not sure what your car is? Check out the excellent BMW timeline at the bottom of this page on Wikipedia. http://en.wikipedia.org/wiki/BMW_E85

Not all GM3 and GM5 modules use this relay. The GM3 module was redesigned for model year 2004. The GM5 module was redesigned for model year 2005. It doesn't matter if the car is for the US, UK, etc, markets.

The GM3 module is located behind the glove box in the E39 5-series and in the E53 X5. Instructions on how to get the module out can be found here GM3 (E53 X5) Removal Procedure. The GM5 is located behind the glove box in the E46 3-series and E85 Z4 and E83 X3. In the E52 Z8 it is located behind the drivers seat behinds some panel. Instructions on how to get the module out of the E46 3-series can be found here GM5 (E46 3-series) Removal Procedure.

Which relay controls what windows. Being the curious person I am, while my GM5 was going in and out of my car for testing of the door lock issue I decided to figure out what the other relays did. I wired up little LEDs in parallel with the relay coils and started rolling my windows up and down. These relays are doubles so each relay has two functions. See the picture below. The large relays are for the front windows and the smaller relays are for the rear windows. The the smaller relays, V23084-C2001-A303 are used to control the rear windows and the door locks, so if you need a pair of those click on the part number and it will take you to my information page.

Relay Diagram

GM5 Repair Service

What to do next?
If you want to send in your BMW module for repair let me know. Contact me via email at scott@bmwgm5.com or call me. My number is 310-283-4273 (do not text me) to check my schedule and arrange the repair. Payment should be made in advance via PayPal to account scott@bmwgm5.com or by money order shipped with the module. When you email or call I will give you the address to ship it to and let you know my schedule so that your module doesn't sit around while I'm on vacation or something.

What's the turn around time?
I you paid for Express Mail next day return shipping I try my best to ship the modules back the same day I receive them. So, if you ship it to me next day air I will do the repair within hours of receiving it and get it to the post office before the 3:30pm Express Mail deadline. In this case door to door turn around time is about 48 hours. If you paid for Priority Mail return shipping, I will repair it and ship it back within 24 hours. All repairs will be done at an antistatic workstation by a competant tech.

Got a comment? Want your BMW module repaired? Send me an email or give me a call. My email address is scott@bmwgm5.com and my phone number is 310-283-4273 (DO NOT text me).

Other relays I sell

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