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Home >> BMW >> 2025 >> 230i >> Repair and Diagnosis >> External Pages >> Different car >> Section 258 (Exhaust System -- Repair M4 (G82 & G83)) >> 18 00 Exhaust System >> 18 00 018 Remove & install complete exhaust system (M4 2021-2023) >> Install exhaust system

Install exhaust system

WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Component with heavy weight. 
Injury hazard! 
  • Note component's center of gravity.
  • Support component using a jack.
  • Secure component against falling off the jack.
CAUTION: Heavy component. 
Heavy components can lead to injury or damage. 
  • Remove and install heavy components with the aid of another person/other persons.
NOTE: TECHNICAL INFORMATION 
Check the exhaust system for tightness after installation.
NOTE: TECHNICAL INFORMATION 
Mount the exhaust system in a de-energized state, following the tightening sequence from the rear silencer towards the exhaust manifold.
NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.
G15298266Courtesy of BMW OF NORTH AMERICA, INC.

Parts:  Seals

G15298267Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Conduct the following operation with the assistance of a second person.
G15298268Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Rear silencer to bumper bracket 
M8 tightening torque  19 Nm
G15298269Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Rear silencer to bumper bracket 
M8 tightening torque  19 Nm
G15298270Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system to rear axle carrier 
M8 Nut tightening torque  19 Nm
G15298271Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system to rear axle carrier 
M8 Nut tightening torque  19 Nm
G15298272Courtesy of BMW OF NORTH AMERICA, INC.

Replace the screw (1).

Parts:  Screw Tighten down screw (1).

TIGHTENING TORQUE SPECIFICATIONS

Exhaust system member on the transmission cross 
M8x25 Replace screw. Tightening Torque 19 Nm
G15298273Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system on the transmission cross member 
M8x25 Replace screw. Tightening Torque 19 Nm
G15298274Courtesy of BMW OF NORTH AMERICA, INC.

Replace the screw (1).

Parts:  Screw

Tighten down screw (1).

TIGHTENING TORQUE SPECIFICATIONS

Exhaust system on the transmission cross member 
M8x25 Replace screw. Tightening Torque 19 Nm
G15298275Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system to holder 
Nut M8 Tightening torque  19 Nm
G15298276Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system to catalytic converters/intermediate pipe 
M8 Replace nut. Tightening torque  5 Nm
Tightening torque  24 Nm
G15298277Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Exhaust system to catalytic converters/intermediate pipe 
M8 Replace nut. Tightening torque  5 Nm
Tightening torque  24 Nm
G15298278Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: The following step(s) must be performed if the listed component(s) is/are installed.
CONSUMABLE DESCRIPTION

High-temperature assembly paste  10 g, Tube 83230309003
G15298279Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Pressure line union nut 
Pressure line union nut Tightening torque  40 Nm
G15298280Courtesy of BMW OF NORTH AMERICA, INC.
G15298281Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work