914Rubber Rear Window Defrost Tube Grommet for Porsche 911 and 912 (65-68)
Enhance your Porsche 911 or 912’s rear defroster system with the 914Rubber Rear Window Defrost Tube Grommet (part number 999.702.040.50), crafted for 911 and 912 models from 1965-68. This reproduction rubber sealing ring secures the defroster hose where it passes through the rear body panel, preventing air leaks and protecting the hose from abrasion. Two grommets are required per car, ensuring hot air from the heat exchangers reaches the rear window efficiently for clear visibility.
PMB Performance, with over 20 years of Porsche expertise, has partnered with 914Rubber for nearly two decades, selling more 914Rubber SKUs than any other retailer. Made from high-grade, heat-resistant EPDM rubber, this grommet withstands temperatures up to 180°F near the 911/912’s flat-six engine and resists degradation from road moisture and salt. Its 15mm inner diameter fits snugly around the defroster hose, maintaining a tight seal against the body, unlike brittle factory grommets that crack after decades of thermal cycling.
The rear defroster system in early 911s and 912s relies on these grommets to maintain airflow integrity. A worn or missing grommet can reduce defroster efficiency, leading to fogged windows, or allow water ingress, risking corrosion in the rear parcel shelf. This 914Rubber grommet installs easily, sliding over the hose and seating into the body panel, restoring the system’s performance. It’s a small part with a big impact on comfort and safety.
Why PMB Performance? We’ve restored 911s and 912s from SWB coupes to Targas, mastering heater box rebuilds and electrical troubleshooting. Whether you’re prepping for a vintage rally or a concours, our knowledge ensures you get parts that fit and last. Questions? Call (855) 786-7101 or email Support@pmbperformance.com. Trust PMB Performance and 914Rubber to keep your 911 or 912’s defroster system dialed in.