Rover 75 Key problems

theoldcodger · 14th June 2011, 17:52

I bought a spare key for the 75 as I only had one bought with it. I have tried to get it programmed using a mechanic with the T4 computer. The ECU will only allow the key to unlock on the remote but not disengage the immobiliser. Does anyone know the answer, Please?
Yes, the key does have a chip in it.

tsautos · 14th June 2011, 18:20

I take it you bought a key off e/bay and not through the proper procedure

baughurst · 14th June 2011, 19:43

Quote:

Originally Posted by theoldcodger

I bought a spare key for the 75 as I only had one bought with it. I have tried to get it programmed using a mechanic with the T4 computer. The ECU will only allow the key to unlock on the remote but not disengage the immobiliser. Does anyone know the answer, Please?
Yes, the key does have a chip in it.

It needs a chip that matches your car not just any old chip.

Dashiel · 16th June 2011, 14:20

T4 will only program the alarm and remote locking on the vehicle.
The immobiliser is a separate system, and has 10 key codes programmed into it in the BMW factory. To get a new key that passes one of the 10 codes that the immbolizer 'knows', you need to get one through XPart or some other ex Rover dealer. They order the key from BMW. £180 or so. And BMW go to their supplier who looks up the vehicle in the database and creates a new key with transponder that is programmed to one of the 10 codes.

pianoman58 · 19th June 2011, 23:20

Our local Auto-electricians is run by "Immoman" off the other side (.org )forum. He can produce you a new transponder for your spare key no problem. You are not too far away from him, he is in Leigh near Wigan.
Give him a ring on 01942 261600 ask for Steve. You'll find him very helpfull and he knows Rover 75/Zt electrics inside out

Thomas · 19th June 2011, 23:21

moved to technical help forum

HarryM1BYT · 20th June 2011, 17:07

Quote:

Originally Posted by theoldcodger

I bought a spare key for the 75 as I only had one bought with it. I have tried to get it programmed using a mechanic with the T4 computer. The ECU will only allow the key to unlock on the remote but not disengage the immobiliser. Does anyone know the answer, Please?
Yes, the key does have a chip in it.

The remote locking/unlocking is a completely separate function to the immobiliser system. The key's plastic part contains a chip, which responds to being interrogated by a system located around the ignition barrel. If the chip does not respond with the correct code as the ignition is turned on, then it will not allow the engine to be started.

chrissyboy · 20th June 2011, 17:29

the chips data is normally read copied then installed to a new blank chip... so in affect it is cloned ... done this way the car thinks its the original key .... our teacher has started doing keys and last week we saw him doing a key,the car started as it should

Trevor1975 · 21st June 2013, 23:05

I had a chip cloned at my local locksmith. The chip didn't work. Apparently there is a 7 digit code, for which the last 4 digits are read on most cars. Their machine will only read / write 4 digits whereas the BMW system uses all 7. Not all locksmiths have the ability to clone the chips correctly, as specific software / modules are required for some makes with a big additional cost.

I bought the transponder chip anyhow and am searching for someone that can clone it properly....

Then I will be able to get the donor remote programmed via a T4...

marinabrian · 21st June 2013, 23:10

Quote:

Originally Posted by ice man

I had a chip cloned at my local locksmith. The chip didn't work. Apparently there is a 7 digit code, for which the last 4 digits are read on most cars. Their machine will only read / write 4 digits whereas the BMW system uses all 7. Not all locksmiths have the ability to clone the chips correctly, as specific software / modules are required for some makes with a big additional cost.

I bought the transponder chip anyhow and am searching for someone that can clone it properly....

Then I will be able to get the donor remote programmed via a T4...

Forget it, cloned transponders are no good.
The fixed part of the coding is one thing however every time the key is removed and inserted a variable code changes, this is why clone transponders "fall out of sync" and fail in a short space of time.
If you want a transponder, I'll need your EWS 3 immobiliser to make a proper transponder, ie a one which works and will continue to work

Brian

P.S. as your car would be out of commission for a couple of days, why not send me your BCU and DDE4, and I can code you a remote too, and give your car a bit of extra "poke".

Special rates apply

14th June 2011, 17:52	#1
theoldcodger the Old Codger Rover 75 Saloon Join Date: Feb 2010 Location: Buckley Posts: 47 Thanks: 16 Thanked 6 Times in 5 Posts	Rover 75 Key problems I bought a spare key for the 75 as I only had one bought with it. I have tried to get it programmed using a mechanic with the T4 computer. The ECU will only allow the key to unlock on the remote but not disengage the immobiliser. Does anyone know the answer, Please? Yes, the key does have a chip in it.

19th June 2011, 23:21	#6
Thomas This is my second home MG6 1.8T GT SE Join Date: Mar 2009 Location: Falkirk Posts: 9,510 Thanks: 106 Thanked 173 Times in 128 Posts	moved to technical help forum __________________ MG6 1.8 TCi in Artic White 1975 Land Rover Series 3

20th June 2011, 17:29	#8
chrissyboy This is my second home lovely little ford focus. Join Date: Jul 2009 Location: East Dulwich Posts: 7,877 Thanks: 2 Thanked 82 Times in 68 Posts	the chips data is normally read copied then installed to a new blank chip... so in affect it is cloned ... done this way the car thinks its the original key .... our teacher has started doing keys and last week we saw him doing a key,the car started as it should __________________ [ I'm really confused. -I keep dreaming I'm an insomniac

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14th June 2011, 18:20	#2
tsautos Loves to post MG EXPRESS Join Date: Dec 2010 Location: STOURBRIDGE Posts: 439 Thanks: 0 Thanked 4 Times in 4 Posts	I take it you bought a key off e/bay and not through the proper procedure

16th June 2011, 14:20	#4
Dashiel Posted a thing or two Rover 75 V6 2.0 Club Tourer LPG Join Date: Apr 2011 Location: South East Posts: 1,405 Thanks: 3 Thanked 39 Times in 34 Posts	T4 will only program the alarm and remote locking on the vehicle. The immobiliser is a separate system, and has 10 key codes programmed into it in the BMW factory. To get a new key that passes one of the 10 codes that the immbolizer 'knows', you need to get one through XPart or some other ex Rover dealer. They order the key from BMW. £180 or so. And BMW go to their supplier who looks up the vehicle in the database and creates a new key with transponder that is programmed to one of the 10 codes.

19th June 2011, 23:20	#5
pianoman58 Regular poster mg zt Join Date: Apr 2010 Location: Leigh, Lancs. Posts: 55 Thanks: 0 Thanked 1 Time in 1 Post	Our local Auto-electricians is run by "Immoman" off the other side (.org )forum. He can produce you a new transponder for your spare key no problem. You are not too far away from him, he is in Leigh near Wigan. Give him a ring on 01942 261600 ask for Steve. You'll find him very helpfull and he knows Rover 75/Zt electrics inside out

21st June 2013, 23:05	#9
Trevor1975 Gets stuck in Rover 75 saloon cdt club SE 1999 Join Date: May 2013 Location: Gloucester Posts: 744 Thanks: 142 Thanked 67 Times in 48 Posts	I had a chip cloned at my local locksmith. The chip didn't work. Apparently there is a 7 digit code, for which the last 4 digits are read on most cars. Their machine will only read / write 4 digits whereas the BMW system uses all 7. Not all locksmiths have the ability to clone the chips correctly, as specific software / modules are required for some makes with a big additional cost. I bought the transponder chip anyhow and am searching for someone that can clone it properly.... Then I will be able to get the donor remote programmed via a T4...