Upgrade your E46 M3 with this genuine BMW SMG Fluid Expansion Tank and Mounting Bracket, originally equipped on the rare and track-focused E46 M3 CSL. This OEM setup is essential for enthusiasts performing a CSL carbon airbox conversion or relocating the SMG pump for improved engine bay layout or CSL-style modifications.
Precision-built to BMW’s factory specifications, this reservoir and bracket assembly ensures optimal fitment and reliability, maintaining proper hydraulic fluid containment for the SMG system. Whether you’re chasing OEM+ perfection or refining your CSL build, this is the right component for a clean and functional install.
Product Details:
- Genuine BMW OE parts
- Includes SMG fluid expansion tank and mounting bracket
- Required for CSL airbox conversions or SMG pump relocation kits
- Designed specifically for the E46 M3 with SMG transmission
- Direct fit for CSL and compatible setups
- Ensures reliable fluid management and OEM-quality appearance