36 12 005 Replacing a runflat tyre

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Follow the fitting machine manufacturer's operating instructions.

It is absolutely essential to ensure that the equipment is in proper working condition and that there is no damage to the disc wheel and tyre.

After completion of work, balance wheels, refer to 36 10 508 BALANCING WHEEL DYNAMICALLY (WHEEL REMOVED) .

IMPORTANT: Only fitting machines which are approved for fitting runflat tyres may be used! Please refer to the operating instructions of the respective fitting machine for details of the exact fitting procedure. Use only BMW-approved plastic-covered tyre irons. Use only BMW-approved tyre mounting paste. For approved wheel/tyre combinations, tyre makes and optional extras, refer to KSD CD.

NOTE: Pay attention to different tyre markings:

Item (1) Marking denoting BMW-approved tyres. Ensure that only BMW-approved tyres are fitted.
Item (2) RSC is the abbreviation for Runflat System Component (runflat tyres).
Item (3) Outside. The tyre must be fitted so that the wording Outside is always situated on the outside of the rim.

IMPORTANT: Many tyres are directional! The arrow on the tyre must point in the direction of travel for each wheel!

Fig 1: Identifying Tire Markings

Courtesy of BMW OF NORTH AMERICA, INC.

After completing fitting, first release clamping claws.

Inflate with air (without valve insert).

Increase pressure up to 3.3 bar in stages (jumping pressure).

If the tyre bead does not slip fully past the rim edge all round, do not under any circumstance increase the pressure.

Release air and force off tyre bead again.

Coat rim flange with tyre mounting paste again.

Inflate tyre again up to 3.3 bar.

When tyre beads are resting perfectly on rim shoulders, increase inflation pressure to max. 4.0 bar to "settle" tyre.

Screw in valve insert and correct tyre pressure.

Follow instructions on initializing Run Flat Indicator (RPA), refer to 36 11 000 INITIALIZING TYRE DEFECT INDICATOR (RPA) .

IMPORTANT: Advise the customer to avoid heavy acceleration in the initial period. The mounting paste can cause the tyre to turn on the rim and give rise to imbalance.