Remove the distributor cap and take out the rotor.
Disconnect the wire tip from the movable contact of the breaker, unscrew the locking screw of the fixed contact plate of the breaker.
Remove the breaker assembly.
Install the new breaker, connect the wire to the moving contact of the breaker, tighten the locking screw of the fixed contact plate of the breaker without applying excessive force.
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Replacing breaker contacts (BMW 3 Series E21)
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