Deforced engines of the N53 series with a power of 160 kW were installed on 325i and 525i vehicles (E6X and E9X). The exact name of these engines: N53B30U0.
Differences from the full power version:
a. no DISA valves in the inlet manifold;
b. the throttle opens only partially (max required torque is 270 Nm);
c. even in kick-down mode, the engine works in Homogenous mode with Lambda 1.00.
The bonus of this current modification: this version can be full-fledged rebuilt as 200 kW (N53B30O0).
These engines had MSD80 management modules with initial SW/ZB 7611396 installed. This release is a total nightmare – many mistakes/software bugs, uneven/twitchy engine performance, high sensitivity to the road quality (continuous fake error messages 3104), etc.
Latest (newest) ZB release, offered by ISTA P: 8619708
As a result of the retrofit, in DIRU, ZB 8619724 is recorded.
If you want an enjoyable performance of these engines, ensure that you install the latest ZB and perform the retrofit of DIRU!
