You may find a lot of articles and forum posts refer to the T5 BCM, but what exactly is a BCM and why does it matter to the retrofits you can do on your T5.

So, What is a BCM? BCM stands for Body Control Module and it is the module that controls the main functions within the vehicle, such as headlights, foglights, central locking etc. It monitors and controls these circuits directly, via relays or via communication with the specific module for that function. The communication is done via the CAN bus network within the vehicle.

Where is the BCM located on a T5?

The BCM is located on the off side of the vehicle, behind the dashboard. To get access to it, you will need to remove the lower dash panel located beneath the steering wheel. Rather than create my own guide on how to remove it and get access, I’ll link to this guide as it has great pictures and steps on how to find your BCM .

Why it matters which BCM you have

There are 5 different types of BCM which could be found on your T5, however, not all of them support the same features. For example, there are only 3 which support Cruise Control and only 2 which support Bi-Xenon headlights.

The part number of the BCM will be in the format of 7H0 937 0xx where xx will be either 86, 87, 88, 89 or 90. Below you will find the features that each model support.

7H0 937 086

Supports Multifunction steering wheel (MFSW), Remote central locking, Anti-theft system, Outside mirror heating and seat heating.

7H0 937 087

Supports the same features as the 7H0 937 086 model but with the addition of Cruise Control and Anti-theft system LIN-databus, which is used for the Alarm horn.

7H0 937 088

Supports the same features as the 7H0 937 087 but with the addition of Start/Stop.

7H0 937 089

Supports the same features as the 7H0 937 088 but with the addition of certain lighting functions (such as LED DRL, Bi-xenon, etc.)

7H0 937 090

Supports the same features as 7H0 937 089.

So what does all this mean? Well depending on what functionality you are wanting to retrofit, you need to ensure that you have the correct BCM. The most common retrofit people want to perform is to fit cruise control, so if you have the 7H0 937 086 BCM and you want cruise control, then you will need to upgrade to a BCM which has a part number of 7H0 937 087 or higher. All BCM’s support the features of the part number with the lower number, i.e. 087 will support all the features that 086 will have.

Part number suffix

The part numbers can also be suffixed with a character and it’s important to make sure you have the correct one for your vehicle. Why? well depending on the model of the BCM, it could be using a different frequency for the remote central locking, therefore you won’t be able to recode your remote fob to work with the new BCM. You can see which frequency your vehicle uses by checking on the key itself, open up the key blade which should expose some writing, within that you should see the either 434 MHz or 315 Mhz. Part numbers suffixed with the letter B, D, F, H, K, M, P, R, T all work on the 434 MHz frequency and part numbers suffixed with the letter A, C, E, G, J, L, N all work on the 315 MHz frequency 

I hope this post helps someone out and if you have any questions, drop a comment below and i’ll try and help you out.


16 Comments

steven bircham · 27th September 2019 at 8:15 pm

Hi Andy I have a 2015 t5.1 fitted with 7HO 937 086p
To fit cruise, mfd is it just upgrade to 7HO 937 087p
Many thanks Steve

    Andy · 27th September 2019 at 9:31 pm

    Hi Steve,
    Yep 087 will let you retrofit cruise. When you say MFD, what is it you’re after exactly as you might need something else?
    Cheers,
    Andy

      Marc · 28th October 2019 at 11:14 am

      Hi Andy,
      Does the same rule apply to instrument cluster upgrades? ie, will a BCM suffixed with letter J only work alongside an instrument cluster suffixed with the same letter?

      Thank you,

      Marc.

        Andy · 2nd November 2019 at 2:23 pm

        Hi Mark,

        Not as far as I’m aware, the part number suffix on the BCM is independent of the instrument cluster.

        Cheers,
        Andy

Ian · 23rd November 2019 at 8:30 pm

Hi Andy, I have a 2011 T5.1 fitted with an 086F BCM. I have a defect where when I have the vehicle lights on , the wipers constantly work even though not switched on. When the lights aren’t on all is OK. When I switch off the engine at any time, the wipers start up for around 20 seconds then go off.

I’m told this is caused by a defective BCM. Is that feasible and if so, where can I source a suitable replacement. Is it plug and play or do I need to get any reprogramming done?

Thanks,

Ian

    Andy · 28th November 2019 at 3:27 pm

    Hi Ian,

    Looking at the pinout of the BCM, the wipers are indeed controlled by the BCM, so it’s entirely possible that the BCM is defective. In terms of a replacement, unless you’re lucky enough to get one with the exact same level of functionality, you will likely need it coding. However, it’s still always advisable to code it to the same as what your existing BCM was. To do this you will need a tool called VCDS by RossTech, however it’s not the cheapest thing for a one off, so you might be better speaking to a local auto electrician or VW specialist.

    Thanks,
    Andy

Stig · 25th November 2019 at 10:17 am

Hi. Thanks for clearing that up:) Good info. Do you know what ZOR stands for? Mine is 2010 ZOG 86, but I found one ZOR 89 I want to purchase, can I use that one?

    Andy · 28th November 2019 at 3:30 pm

    Hi,

    Thanks for the positive feedback, much appreciated. Where is the ZOG number written? I’ve not come across that before.

    Thanks,
    Andy

      ricardo gouveia · 9th January 2020 at 12:27 pm

      Hi Andy
      I’ve recently had a mk7 gti steering wheel fitted to my 2014 t5.1. The issue I’m having is the illumination not working due to the bcm.
      Do you know which bcm I would need to fix this problem?
      Thanks
      Ricardo

        Andy · 16th January 2020 at 6:04 pm

        Hi Ricardo,
        As far as I’m aware, the illumination should still work, just some buttons may not work as there was a firmware change on the later models, so even though they both use linbus, only the later BCMs will understand the commands for cruise control. Have you confirmed voltage at the pins on the coil spring connector?
        Thanks,
        Andy

David Chandler · 25th November 2019 at 11:17 pm

Hi. My current bcm is 7H0937086F. Would I be ok to fit 7H0937090D? Thanks

    Andy · 28th November 2019 at 3:32 pm

    Hi,
    You may have issue’s with trying to fit that one as the headlight wiring (and possibly some other functionality) is wired differently. If you look at the connector on the head light switch, if it has 10 pins then it *should* be fine, however if it’s 17 pin then it won’t work and you’ll need a wiring modification. It’s something I’m looking at doing on my Van at the minute, so will put up a tutorial as and when I’ve done it.

    Thanks,
    Andy

Lewis · 5th January 2020 at 9:03 am

Hi Andy, great guide, I’m trying to retrofit a complete t6 interior to a t5 I have all the equipment and harness steering wheel etc from a t6, have you had any experience retrofitting a bcm from a t6? Thanks

    Andy · 16th January 2020 at 5:00 pm

    Hi,
    Thanks for the positive feedback!
    I’ve not had no experience, but it sounds an interesting project, I’ve thought about it myself. Let me know how you get on. With regards to fitting the BCM, from what I’ve heard, it should just be straight plug and play as per the T5.1. Do you have a part number for it?
    Thanks

Adam Box · 7th January 2020 at 7:34 pm

Many thanks for this really helpful guide, it is genius! After following your instructions I was disappointed to find that my newly purchased T5 has the BCM ending in 086 meaning I can’t easily fit an after-market cruise control. I have started looking for an 087 BCM but would like clarification about the frequency prefix: my key is 434Mhz, but where on the part number is the prefix; is it the ‘H; in 7H0 937 086, or something else?

    Andy · 16th January 2020 at 6:02 pm

    Hi,
    Thanks for the positive feedback! The prefix will be on the end of the part number, so 7H0 937 086H. With regards to the frequency, any you buy from a UK vehicle should be fine.
    Thanks

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