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Home >> BMW >> 2025 >> M4 Competition >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes -- Repair M4 (G82 & G83) >> 34 51 Mechanical-Hydraulic Components >> 34 51 601 Replacing hydraulic unit (after vehicle diagnosis) (M4 2021-2023) >> Installing the hydraulic unit

Installing the hydraulic unit

NOTE: TECHNICAL INFORMATION 
Maintain conditions of absolute cleanliness.
G15332832Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Hydraulic unit to pedal bracket 
Replace nuts.
M8 1x retightening at hydraulic unit after 10 min.
tightening torque  22 Nm
G15332833Courtesy of BMW OF NORTH AMERICA, INC.
G15332834Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
Do not interchange brake lines. Mark the brake lines before disassembly (for example, VL/VR/HR/HL)  .
Do not bend brake lines.
Close off connecting bores with seal plugs.
G15332835Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Brake pipe screw connection/Union screws 
tightening torque  17 Nm
G15332836Courtesy of BMW OF NORTH AMERICA, INC.
G15332837Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work