This is an eccentric adjustment bolt from the BTAP (BMW278681) brand, used in the rear suspension system of BMW 3 Series models such as E36 (1990-1998) and E46. It connects the rear lower swing arm (spring arm) to the chassis and changes the camber angle (tilt inwards/outwards) of the wheel when turned. It often becomes stuck due to rust during toe adjustment, making it impossible to remove, and it needs to be replaced with a new one.
- Eccentric Structure: The body and head of the bolt allow for angle adjustment by pushing and pulling the swing arm when rotated with a washer.
- Essential for Toe Adjustment: If your rear tires are wearing on the inside or outside and cannot be adjusted, this bolt should be replaced.
- High Strength: Made from hardened steel (quality 10.9) to carry suspension loads.
- Compatible Models: Used for rear camber or toe adjustment in many BMW models such as E36, E46, E39, E60, E83 X3, E53 X5.
Technical Details
| Brand |
BTAP (Aftermarket) |
| Product Code |
BMW278681 |
| OEM Reference |
33 32 6 863 853 / 33 32 1 095 102 |
| Dimensions |
M12 x 1.5 x 82mm (Approx) |
| Usage Location |
Rear Lower Control Arm Connection |
Frequently Asked Questions (FAQ)
Does it include the washer and nut? Typically, products sold under this code are only the "Eccentric Bolt." The eccentric washer and nut are sold separately or can be reused if your old part is intact. Please check the product image.
Why should I replace it? In BMW vehicles, these bolts can fuse into the swing arm bushing over time (rust). When a wheel alignment technician tries to adjust the camber, the bolt may not turn. If forced, it can break. Therefore, it is recommended to replace it during rear suspension revision.
How many should I buy for both sides? For rear camber adjustment, there is a total of 2 bolts, 1 on the right and 1 on the left. It is advisable to replace both.
