3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
was wanting to know. as when i enquired about a possible engine replacement at a local breakers yard they told me that it had to be the same as what was in. but never told me about the difference between the s4 and s5. said if it was fitted with a s4 then you have to put a s4 in... thanks for all your help. regards alan
hi. is the ecu unit in a x reg 525 e39 the same as the e46.
I think this depends on the year of the E46 your gonna transplant in. The E39 used a different engine then te E46 dependent on model year. The ECU itself in terms of the unit should be the same. It's the software you would have to worry about. As Dabsy said a "re flashing" might be nessecary.
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