BMW 215LW Large-Case SuperLock LSD, OS Giken BM531-HA
BMW 215LW Large-Case SuperLock LSD, OS Giken BM531-HA
Shipping calculated at checkout.
To United StatesChange
Final options and totals are confirmed at checkout.
Available to order
Shipping & returns
Available to order. Contact us before ordering to confirm lead time.
Shipping details
In-stock orders are processed within 48 hours; transit time is additional.
International orders include export processing and customs clearance. Duties, taxes and brokerage are extra; final freight charges may change after remeasurement.
Read the shipping policyReturns
Need help with a return? Request authorization within 30 days of delivery for eligible unused, uninstalled items. See details for exclusions and applicable fees.
Read the full return policyReturn details & how to start
Request return authorization (RMA) within 30 days of delivery for eligible items. Keep items unused and uninstalled, with original packaging and accessories. Electronics, liquids, special orders and other categories are excluded.
Email sales@frsport.com with RETURN and your order number in the subject to request an RMA. Please wait for return authorization before sending your item back.
Wrong part/size or change of mind: a 20% return processing fee applies, plus applicable shipping costs.
Original shipping is non-refundable. For orders shipped free, the actual outbound shipping cost is deducted from the refund. Return shipping is prepaid by the customer.
After payment capture, cancellations and refunds generally incur a 5% processing fee, except for our error, confirmed defects or confirmed carrier loss. The 5% and 20% fees do not stack; only the greater applicable fee applies. Store credit waives the 5% fee, but applicable return fees remain.
Missing, incorrect or transit-damaged items: report within 3 business days of receipt with photos of the product and packaging.
For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.
Specifications
Product details shared across all variants.
- Product type
- Limited Slip Differential Assembly
- Category
- Differentials
- Item condition
- New
- Manufacturer type
- Aftermarket
- Shipping dimensions (L × W × H)
- Shipping weight
- 28.0 lb
Billable shipping weight; may include dimensional weight.
OS Giken BM531-HA is a SuperLock limited-slip differential for the BMW 215LW large differential case. The manufacturer lists the E92 335i with N54 and the early 135i manual-transmission application, subject to differential configuration.
Designed for the 215LW three-bolt type. Later 215LW spline-type installations require specialist removal and machining of the welded ring gear. Confirm the actual case, ring-gear attachment and drivetrain before ordering; the model name alone does not establish fitment.
- Standard 1.5-way configuration with 25/35 ramps
- 20 plates
- Progressive clutch-type locking
This is the LSD unit, not a complete differential housing assembly. Installation and setup require the vehicle service procedure and a qualified differential specialist.
