Aluminum Coolant Port Flange Fitting Water Hose Fitting For BMW N54 N52 N53
The N54 engine sees failure at the plastic cylinder head outlet adapter connecting the cylinder head to the thermostat hose. For N54 3.0L twin-turbo motors 335i, 335xi, 135i and 1M. 1x Billet Aluminum Coolant Port Flange Fitting.