GAB01-021 – Rubber Flex Disc – Bmw Application – Bolt Circle Dia 96MM – Disc Width 33.5MM

The GAB01-021 rubber flex disc is the rubber driveshaft coupling used on BMW European and import vehicles in place of a u-joint. It flexes to absorb angular movement and vibration between the transmission output flange and the driveshaft — without the velocity variation that a standard u-joint produces at high operating angles. A cracked or hardened GAB01-021 rubber flex disc causes driveline clunk and vibration that looks like a u-joint problem but requires a completely different fix.

Gab01-021 Rubber Flex Disc — BMW Bolt Pattern & Dimensions

The GAB01-021 rubber flex disc specs: 96MM bolt circle | 6 holes | 10MM dia | 33.5MM wide. 1ER, 3ER, 5ER, X1. Bolt circle diameter is the critical measurement — it has to match both the transmission output flange and the driveshaft input flange simultaneously. Disc width determines the angular flex range. Under-rated rubber fatigues fast; over-rated rubber transmits vibration instead of absorbing it.

Flex disc replacement is straightforward: six bolts out, new GAB01-021 rubber flex disc in, torque to spec. The one mistake to avoid is reusing rubber that feels firm but shows fine surface cracking — hardened rubber can't flex properly and the vibration it was supposed to absorb gets passed directly to the chassis.

Key Features

• Application: BMW
• Bolt circle: 96MM — must match both flanges exactly
• Bolt holes: 6 — confirm hole count matches your flange
• Bolt hole dia: 10MM
• Disc width: 33.5MM — controls angular flex range
• Rubber coupling — absorbs vibration and angular movement without u-joint velocity variation
• Direct swap — no modification required
• Note: 1ER, 3ER, 5ER, X1

Specifications

• SKU: GAB01-021
• Brand: UDS
• Application: BMW
• Bolt Circle: 96MM
• Bolt Holes: 6
• Bolt Hole Dia: 10MM
• Disc Width: 33.5MM
• Notes: 1ER, 3ER, 5ER, X1