OXEOERIW Gen 1 B58 Replacement Turbocharger — M140i M240i M340i 540i 740i

Where aging or failed OEM turbos typically show their wear through sluggish spool-up and uneven mid-range power, this replacement is designed to restore the sharp throttle response and linear torque delivery the B58 was built around. The result is boost pressure that builds predictably across the RPM range — something B58 drivers who have experienced a degraded turbo will notice immediately after the swap.

At 63x40x32cm, the unit matches the compact OEM footprint exactly, slotting into the original engine bay without clearance issues or bracket fabrication. This is a true bolt-on replacement, not an adapted unit from a related platform — an important distinction for anyone who has dealt with fitment surprises on aftermarket forced induction components.

Professional installation is strongly recommended. Before fitting any replacement turbocharger on the B58, inspect and replace the oil feed and return lines as a matter of course — restricted or contaminated oil supply is the leading cause of premature turbo failure, and protecting that investment starts before the first cold start.