BMW 5 Series: Exhaust turbocharger
B58TU exhaust turbocharger

Exhaust turbocharger in the B58TU engine
- Exhaust turbocharger made of steel, for cylinder head-integrated exhaust
manifold ZIAK¹
- Exhaust turbocharger made of steel, for non cylinder head-integrated
exhaust
manifold nZIAK²
ZIAK¹ = cylinder head-integrated exhaust manifold
nZIAK² = non cylinder head-integrated exhaust manifold
Due to the exhaust manifold integrated into the cylinder head, the exhaust
manifold and exhaust
turbocharger housing are no longer designed as a single component for the B58TU
engine. This
means that the exhaust turbocharger can be individually replaced. The charging
pressure is still
controlled by an electrical wastegate valve.
The exhaust manifold and exhaust turbocharger housing on the B58TU engine can be
implemented
either as one part or separately. Depending on the engine version, the exhaust
turbocharger can be
replaced individually. The following table shows which variant is used by which
engine.

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Fuel preparation
The fuel preparation has been modified to meet the requirements of emission
legislation. The high
pressure pump and the injectors have been revised and designed for a fuel
injection
Mounting the injectors
Mounting bolts
Plastic sleeve
Holding clamp with bayonet fitting
Rail
Solenoid valve injector
Cast lug
The solenoid valve injectors are fastened to the holding clamp w
Measures at the solenoid valve injector
The following graphic illustrates the differences between the EURO 6b and
EURO 6c versions:
EURO 6 measures, solenoid valve injector
Solenoid valve injecto
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On-board diagnosis
Feed-in point of the blow-by gases to the clean air line upstream from the
exhaust turbocharger
Non-return valve
Connection to exhaust turbocharger
Captive screws
Crankcase bleeding connection
Tank ventilation connection
Connection to clean air line
Aluminum heating pip
Body overview
G30 Side frame structure
Multiphase steel (> 300 N/mm²)
Ultra-high-strength steel (> 900 N/mm²)
Aluminum
Deep-drawing steel (< 300 N/mm²)
Other steel grades
Inner roof frame
Roof frame reinforcement
B-pillar reinforcement
Side sill reinforce