E60 CAS2 key compatible

**Fec001** · 23rd February, 2017, 09:27 AM

Hi!
I have a customer who bought this china key. As I'm not key expert, read it with TAG key tool and make photo about ID. I want to know if I can adapt it to CAS2 system.
numbers on key chip:
NXP
26A0700
MM40403
TX6441

Thanks!

**Fec001** · 23rd February, 2017, 07:58 PM

Any Hitag expert?

**indienick** · 23rd February, 2017, 08:25 PM

I really don't think it's possible. Perhaps the transponder can start car but remote definitely will not work.

**hkcarkey** · 24th February, 2017, 07:18 AM

I've done one before...it's work but the response of the remote just not as good as the original.

**Fec001** · 7th March, 2017, 11:40 PM

Adapt the key with tagkey tool by CAS2 dump. Key starts the car but remote doesn't work

.
probably because of pcf 7945.

**Fec001** · 27th April, 2017, 02:56 PM

Changed to PCF7944. Car starts but remote still doesn't work. Any idea?

**Fec001** · 3rd May, 2017, 08:35 AM

Remote even can't make any radio signal. Could this be because of bad programming?

**bearheroes** · 3rd May, 2017, 12:38 PM

How did you do that? Pcf 7944 and 7945 have different footprint...

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**Fec001** · 5th May, 2017, 07:08 AM

Interesting, just changed it on pcb, first checked if tag key tool can recognize and adapt by cas2 dump

**bearheroes** · 5th May, 2017, 07:41 AM

I ask you again...how did you do that? Pcf7945 has 28 legs...pcf7944 16...

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**Fec001** · 5th May, 2017, 07:46 AM

That is marked as PCF7941 but tag key tool recognize as PCF7942-44

**bearheroes** · 5th May, 2017, 08:43 AM

Transponder's ID indicates the type...so probably both are the same...but different id...chinese games...
Solder back ori transponder and find someone with tmpro and bmw cas function, renew it and write it again with tmpro...because only with tmpro remote will work again...

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**HeXeN** · 7th May, 2017, 04:15 PM

where did he buy it?

**Fec001** · 14th September, 2017, 01:21 PM

Don'T know, customer bring it. Anyone can tell me how can I read transponder again after programming locked it? As I know I must give correct SK low and high in order read user pages. I think problem is that in user page0 the second digit is not 4 what indicates it is BMW remote.
Can be SK low and SK high get from CAS2 dump?

**drugowaz** · 14th September, 2017, 01:29 PM

Did this few days ago. car starts ,but no remote s i couldt check as original owner key didnt worked to even with good frequency signal of original remote. problem in car 99% antena etc