Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Removing and installing the intake system (B48 and B46 engine) (Cooper S and John Cooper Works)
Preliminary work needed:
- Disconnect cable from BATTERY EARTH LEAD .
- Remove INTAKE SILENCER HOUSING .
- Remove TANK VENTING VALVE .
Removal:
Unlock connector (1) and detach.
Unclip the wiring harness (2) and release it from the intake system.
Unclip the positive line of the alternator (3) and release it from the intake system.
Unlock connector (1) and detach.
Unclip the coolant hose (2) from the holder.
Unclip the wiring harness (3) and release it from the intake system.
Unlock and detach connectors (1) and (2).
Unlock and detach pressure pipe (3) from throttle body.
Put the pressure pipe (3) to one side.
Slacken screws in the sequence (5 - 1 ).
Pull intake system (6) off cylinder head and remove.
Installation:
Replacement:
Remounting the THROTTLE BODY .
Remounting the BOOST PRESSURE SENSOR .
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.