Elring Dichtung Thermostat Housing O-Ring for Porsche Cayenne (2003–2006)

This Elring Dichtung thermostat housing O-ring is a direct-fit coolant sealing part for Porsche Cayenne applications listed in the fitment table below. It seals the thermostat housing connection on 4.5L V8 Cayenne, Cayenne S, Cayenne Turbo, and Cayenne Turbo S models so the cooling system can hold pressure without seepage at the housing joint.

Elring Dichtung has been manufacturing engine sealing components for over a century, supplying gaskets, seals, and sealing systems to major vehicle manufacturers including Porsche. Known for German engineering, OEM-level sealing performance, and precision manufacturing, Elring components are built to maintain proper sealing under heat, pressure, and long-term engine operation.

Technical Details

• Manufacturer part number: 625.270
• Type: Thermostat Housing O-Ring / Coolant Flange Seal
• OE reference: Porsche 999 707 502 40 / 99970750240
• Application range: Porsche Cayenne 2003–2006
• Known Porsche fitment: Cayenne 4.5L V8, Cayenne S, Cayenne Turbo, and Cayenne Turbo S
• Position note: commonly listed as lower at the thermostat housing connection

Fitment & Compatibility

Use the fitment table below to confirm your exact year, model, and submodel before ordering. This seal may share applications with Volkswagen models, but the Porsche fitment focus here is Cayenne 2003–2006.

If you are unsure whether this O-ring matches your thermostat housing, send us your VIN and we will help verify fitment. PMB Performance has more than 20 years of Porsche parts and service experience, and small sealing details like this are worth confirming before the repair starts.