BMW N54 Downpipe Flange Gasket for Exhaust Repair

E46

$13.58

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Key Features

OE reference numbers 18307553603 and 18307589343
For N54 exhaust downpipe flange sealing
Smart replacement during downpipe or turbo removal
Helps prevent exhaust leaks at flange connection
Do not reuse crushed, heat-cycled old gaskets
Verify fitment - E46 and N54 pairing is unusual

Product Details

Category: Downpipes
ASIN: B08ZHMF75R

Check if it fits your BMW

BMW N54 Downpipe Flange Gasket for Exhaust Repair — Overview

This is the exhaust flange gasket used at the downpipe connection on BMW applications running the N54. If you're pulling the downpipes for turbo work, replacing leaking exhaust hardware, or chasing a cold-start tick from the flange area, this is one of those small parts worth doing once and doing right. Fresh gaskets matter here because reused ones love to seep once they've been heat-cycled a few times.

I'd pick this over reusing the old gasket every time, especially on cars with higher mileage or any corrosion around the flange faces. The listed part numbers match BMW OE references, which is what you want for sealing and fit instead of gambling on a generic cut ring. One fitment note though - N54 fitment usually points to chassis like E82, E88, E90, E92, and E93, so if you're shopping for an E46, double-check the exact application before ordering.