In normal operating conditions every 40,000 km (24,000 miles); if fuel quality is poor every 20,000 km (12,000 miles).
Remove the seat.
Remove right trim panel.
Disengage fuel tank.
Caution! Fuel is flammable and a hazard to health. Observe relevant safety regulations.
Seal the fuel feed and return lines with hose clips, BMW No. 133010, and disconnect.
Disconnect breather lines.
Pull the plug connector off the fuel pump unit.
Remove fuel tank.
Drain fuel tank.
Remove fuel pump unit.
Disconnect hoses from fuel filter (1).
Replace the fuel filter.
Caution! Note correct direction of flow through fuel filter.
Secure non-reusable hose clips with pliers, BMWNo. 131500.
Caution! Make sure O-ring (2) is in perfect condition.
Tightening torque: Fuel pump unit — 6 Nm.
Caution! After installing, check fuel pump unit for leaks.
Note: Make sure that breather lines are correctly routed.