BMW part number 32311154176 (M8x25 grade 8 fracture/shear bolt, superseding 32311154129, 32311154173, and 82306002001) is an anti-tamper steering lock / ignition switch mounting bolt.
- 3 Series (E30, 1984–1993). Fits 318i, 318is, 325, 325e, 325es, 325i, 325is, 325iX, and M3.
- 5 Series (E28 & E34, 1984–1995). Fits E28 models (524td, 528e, 535i, 535is, M5) and E34 models (525i, 530i, 535i, 540i, M5).
- 6 Series (E24, 1985–1989). Fits 635CSi and M6 coupes.
- 7 Series (E32, 1987–1994). Fits 735i, 735iL, 740i, 740iL, and 750iL sedans.
What It Does & Exact Location
- Ignition Lock Clamp Bolt. This M8x25 shear bolt clamps the cast aluminum steering lock and ignition switch housing onto the steel steering column tube.
- One-Time Anti-Theft Design. Once torqued to factory specification, the hex head shears off cleanly to prevent unauthorized removal of the ignition lock cylinder.
To remove old headless shear bolts from an E10 or E21 steering column, use a sharp center punch and hammer to tap the bolt counter-clockwise, or cut a flat slot into the rounded dome with a Dremel. Because factory torque is relatively low and the bolts rarely seize from rust inside the cabin, they usually spin right out once broken loose.
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