u/Hefty_Support4080

Hey guys,

I have a 2007 BMW 320d (M47TU2 engine, 320,000 km) and I'm dealing with a turbo issue I can't fully resolve.

When I floor the accelerator, the turbo spools up, then cuts, then spools up again, then cuts again — repeating this cycle continuously under full throttle. This happens for a few days, then the car eventually goes into limp mode.

I pulled the fault codes and got:

- 4530 — Boost pressure too high (overboost)

- 4D00 — Turbo actuator position/regulation fault

- 4A70 — Boost pressure sensor out of range

The turbo shaft has zero axial or radial play, compressor wheel looks intact, no broken blades.

Has anyone dealt with this exact combo of fault codes on the M47TU2?

Thanks

Hey guys, I have a 2007 BMW 320d (M47TU2 engine, 320,000 km) and I'm dealing with a turbo issue I can't fully resolve.

When I floor the accelerator, the turbo spools up, then cuts, then spools up again, then cuts again — repeating this cycle continuously under full throttle. This happens for a few days, then the car eventually goes into limp mode.

I pulled the fault codes and got:

- 4530 — Boost pressure too high (overboost)

- 4D00 — Turbo actuator position/regulation fault

- 4A70 — Boost pressure sensor out of range

And a clogged dpf

The turbo shaft has zero axial or radial play, compressor wheel looks intact, no broken blades.

Has anyone dealt with this exact combo of fault codes on the M47TU2?

Thanks