Billet Firewall Coolant HVAC Fitting | 203830399664 sealed with an O-ring and

sealed with an O-ring and held together with three small bolts

This HVAC fitting is a very Common Failure point on many M112/113 V6/V8 W203 and W209 Chassis among others

easier to install/remove and with the option to cap off the windshield washer reservoir side if desired

Included in this kit:

To correct this

Billet Firewall Coolant HVAC Fitting | 203830399664 sealed with an O-ring andThis HVAC fitting is a very Common Failure point on many M112 113 V6 V8 W203 and W209 Chassis among others, this connects the Engine Block to the Heater Core and small port to The Washer Fluid Heater. The Failures occur simply for the fact that the OEM fitting is made from plastic that becomes brittle with age and heat cycling. Resulting in coolant loss directly into the windshield cowl area and possible overheating. To correct this, we designed this