Bilstein B6 Performance 36mm monotube front-left strut for the 2008-2013 BMW M3 (E9X) and 2011 1 Series M. A bolt-in upgrade designed to pair with the OE factory spring, using application-specific valving and Bilstein gas-pressure technology for sharper handling and stability while meeting or exceeding OE standards.
Specifications
| Type | B6 Performance strut assembly |
| Design | 36mm monotube gas-pressure |
| Position | Front left |
| Spring | Pairs with OE spring |
| Part Number | 35-143321 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011 | BMW | 1 Series M | Base |
| 2008-2013 | BMW | M3 | Base |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
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