BMW E39 525TDS not starting

**pugbug** · 20th May, 2021, 08:39 PM

Hello,

I have a very early e39 525tds that is giving me a major headache. After being parked up for half a year, it fired up straight away. I was driving it for a month and then left it parked up, the alarm went off whilst I way away, the battery voltage became low. Went to start it, it will no longer start. Having 99% established this is not a mechanical fault.

I have two error codes on the ews module please see photos.

255
15

I was playing around with INPA software and came across :

ISN NUMBER:
PASSWORD: ERROR_ECU_REJECTED

I'm not particularly clued up about BMW electronics, I think there is a problem with ews dde alignment?

I have no option with INPA under the engine menu to sync

Please can someone help me wtih this problem, I can take the eeprom off for immo off. I assume this is immobilised? The dde light goes out after the glowplugs turn off but immediately after cranking it comes back on.

Many thanks