Replacement 'proper' key

Gareth Rowbotham

Dedicated Member
British Zeds
Joined
Aug 1, 2020
Messages
58
Location
Yorkshire
Model of Z
S50 Z3 M Roadster
So, I finally got round to trying to sort this and found someone to do it... and it turned into a 2.5 hour soap opera.

I found Andy through a friend of a friend, and he said he was fine sort out a replacement. He turned up at my work yesterday just before 12pm. Grabbed my key and started by copying the blade on a machine in the back of his van. Cool machine - scans the key, then the CNC head cuts a copy from a blank. Unfortunately, the first didn't work.... or the second. He then realised that my key has a strip down the middle so used a different type of blank. After a bit of filing, it finally turned in the lock and the ignition barrel. That took an hour!!!

In the meantime, whilst the CNC machine was cutting, he went looking for the EWS module. I wasn't sure (but thought it was behind the glove box) and we quickly found it by taking the glove box off (held by 5 screws). This proved to be the least problematic part. With the EWS module out, he had all the kit in the van and was able to copy the board, read the data on his laptop and write a new chip.

So we are 90 minutes in and we have a new blade and the immobiliser chip. I thought they were the hard bits done but syncing the key to the central locking proved impossible. He didn't have blank BMW diamond style key with him (even though he thought he had one), so was going to have to come back, but did have a Mini key to use temporarily. He reckoned the sequence to pair the key to the car:
- Turn the existent key in the ignition - on then off.
- Press and hold the door open button on the remote key
- Then press the central button on the remote key three times quickly (if this doesn't work, repeat but press the centre button eight times quickly!)
Well, try as you like, whatever he did, he couldn't get the key to sync to the card. He had a 433mhz tester in the van so knew that the key was fine.

After the best part of another hour, he finally decided that it must be something wrong with my car, and suggested that the "Central convenience module" cant be working if it cant pick up the key for the central locking! I googled it and found this on eBay which he said was the correct device and needs replacing!

1616255350016.png


Does this sound right? Surely if the central locking is working, then this unit is fine? If I do replace it, are they coded to the car? I wondered if it could be the fuse for this Control module, but then surely, the central locking wouldn't work.

As it stands, my new friend Andy is getting the proper key this week, and I am to replace the control module, then we'll get back together.

Are we missing something? Given that I now have a new correct blade and the correct immobiliser chip copied from the EWS, surely the other bit is easy??? Are we pairing the key to the car incorrectly?

IMG_0460.jpeg


Any comments welcome......
 

Gareth Rowbotham

Dedicated Member
British Zeds
Joined
Aug 1, 2020
Messages
58
Location
Yorkshire
Model of Z
S50 Z3 M Roadster
Do you have the alarm control module underneath the glove box as in this thread? I have the brick type as in the thread but I’m wondering if the key type has the same procedure it’s just pressing buttons after all. https://zroadster.org/articles/3g-ews-remote-fob-programming.24/
I'll have to have another look at it. If it has a learning mode that would explain why we couldn't pair the key! But it doesn't look like the one in the linked thread....!
 

Gareth Rowbotham

Dedicated Member
British Zeds
Joined
Aug 1, 2020
Messages
58
Location
Yorkshire
Model of Z
S50 Z3 M Roadster
I'll have to have another look at it. If it has a learning mode that would explain why we couldn't pair the key! But it doesn't look like the one in the linked thread....!
So, I've finally got round to looking behind the glovebox again. Picture below. I don't seem to have the alarm control module, as shown in the linked thread.

Am I missing a module? Can they be picked up from scrappers and re-coded to a different car? Mine's a 98 M Roadster (pre-facelift S50 engine) so does this have a different module for remote fob operation?

On the picture below, I've numbered the spaces and modules. I'm thinking the space marked 2 has some cables but nothing in the space, so is that where the alarm control module should sit...? Any guidance gratefully received.
IMG_0468.jpg
 

Lee

Zorg Guru (V)
British Zeds
M Power
#ZedShed
Joined
Mar 26, 2014
Messages
3,881
Location
Basingstoke
Model of Z
Z3 Roadie 2.8TU
Bit late to this thread. Jumping on the back of what Althulas said, with my old Z3M I bought a couple of old bricks and re sync’d them flicking that switch into learning mode on the module in position 2. Odd that yours is missing, find the part in realoem and see if any other cars used the same module, might make it easier to find.

looking like this.
8B693815-B168-4938-AE19-5B9609D16246.jpeg
 

Ianmc

Zorg Guru (III)
British Zeds
The M44 Massive
Joined
Oct 12, 2014
Messages
2,478
Location
New Forest
Model of Z
Z3 (M44)
Can you point out the learning mode switch please? My Z3 has fully operational "bricks" but the "bricks" for our E36 convertible also activate the locking alarm on the Z3 (not vice versa). My assumption is that the Z3 is in learning mode, but I haven't been able to locate the switch to cancel learning mode behind the glovebox. I might be being exceptionally dim............... :confused:
 
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Lee

Zorg Guru (V)
British Zeds
M Power
#ZedShed
Joined
Mar 26, 2014
Messages
3,881
Location
Basingstoke
Model of Z
Z3 Roadie 2.8TU
Can you point out the learning mode switch please? My Z3 has fully operational "bricks" but the "bricks" for our E36 convertible also activate the locking alarm on the Z3 (not vice versa). My assumption is that the Z3 is in learning mode, but I haven't been able to locate the switch to cancel learning mode behind the glovebox. I might be being exceptionally dim............... :confused:
That’s exactly what’s happened. My M was like this for years before I realised. Every time I went to a Zed meet everyone would lock and unlock my Zed =)) left in learning mode. I will need to have a serious dig for a photo. It’s a tiny little slider on the back of the box.
 
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