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classic_rover
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What is the difference with the options such as with NNN100752.

How do you distinguish between the ECU options if the part no is the same?
 

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The only difference that you find would be for vehicles fitted with ABS or not. The 1.4/1.6 and 1.8 are all the same ECU partnumber, they are just supplied the relevent info for the car, so if it a Rover 25, 1.4 plus model then it will have all the relevent information for that vehicle programmed in, including the map.
 

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The only difference that you find would be for vehicles fitted with ABS or not. The 1.4/1.6 and 1.8 are all the same ECU partnumber, they are just supplied the relevent info for the car, so if it a Rover 25, 1.4 plus model then it will have all the relevent information for that vehicle programmed in, including the map.
The ECU doesn't control ABS, as i found out with my R25 tdi.

My old tdi had a re-mapped ecu, and the new R25 didn't, but had ABS.

I swapped the ECU and 5as units over, and the re-mapped ECU in the ABS car worked with no problems. The ABS works.

Cheers
Skelo
 

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As far as I'm aware the ABS has it's own control unit, not sure how it interfaces with the engine ECU and whether all MEMS ECU's are ABS capable.
 
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