LN Engineering 996 106 447 04 Genuine Porsche Coolant Expansion Tank Cap

The LN Engineering 996 106 447 04 is a Genuine Porsche coolant expansion tank cap sourced and sold by LN Engineering — Porsche's trusted specialty parts supplier since 2002. This OEM-spec cap seals the coolant expansion reservoir and maintains proper system pressure in water-cooled M96 and M97 Porsche engines.

A worn or cracked expansion tank cap is a common cause of coolant loss and overheating in aging Porsche platforms. Replacing it with a genuine OEM cap ensures correct pressure regulation, a proper seal, and peace of mind — especially when performing a coolant flush or water pump service.

Key Features:

• Genuine Porsche OEM expansion tank cap
• Direct, no-modification replacement for the original cap
• Maintains correct cooling system pressure for M96/M97 engines
• Recommended replacement item during coolant service or water pump jobs
• Sourced and fulfilled by LN Engineering, Porsche M96/M97 specialists

OEM & Cross-Reference Part Numbers:

• 996 106 447 04
• 996-106-447-04
• 996.106.447.04
• 99610644704
• Supersedes: 996 106 447 03, 996 106 447 01