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Seat Belts - REAR
Seat Belts - REAR

Fits:
Porsche 911 1980-89
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 968 1992-95
Porsche 924 1978-85
Porsche 924S 1986-88
Porsche 944 1982-91
This product supersedes Porsche's old part numbers:
- 477857739A
- 477857739B
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477857739B70B
The product you are viewing cross references to these numbers
Porsche Rear Seat Belts | Design911 Safety Belts & Harnesses for Passenger Protection
Rear seat belts are a vital safety feature, designed to protect passengers and maintain Porsche’s commitment to performance and security. These precision-engineered restraint systems ensure that rear occupants are safely secured in every driving condition — from daily driving to long-distance touring. Whether you’re restoring a classic 911 or maintaining a modern Porsche, reliable rear seat belts provide essential peace of mind and safety for all passengers.
At Design911, we supply a wide range of rear seat belts, buckles, retractors, and mounting kits, developed for precise fitment and lasting performance. Each component is manufactured from durable webbing and corrosion-resistant hardware to meet the demands of road and track environments. Perfect for restoration projects, safety upgrades, or replacements, our products ensure Porsche-standard quality, function, and appearance.
What Do Rear Seat Belts Do?
Rear seat belts provide safety, comfort, and legal compliance, ensuring that passengers are properly restrained during travel.
Core Functions:
• Protect passengers in the event of sudden braking or collisions.
• Distribute impact forces evenly across the upper and lower body.
• Maintain correct passenger seating position for maximum safety.
• Reduce cabin movement and enhance occupant comfort.
• Support compatibility with child seat anchoring systems (ISOFIX in modern
models).
A properly functioning seat belt system is critical not only for safety but also for maintaining the integrity and comfort of your Porsche’s cabin.
Why Do Rear Seat Belts Fail or Degrade?
Even though rear seat belts are used less frequently than front belts, they can still deteriorate due to environmental exposure, age, and mechanical fatigue.
Common Causes of Failure Include:
• Webbing fray, fading, or weakening from UV exposure.
• Sticking retractors or locking mechanism failure.
• Corrosion on mounting bolts and anchors.
• Contamination from dirt, oils, or cleaning chemicals.
• Previous accident stress weakening the belt’s strength.
Worn or damaged rear seat belts compromise both passenger safety and vehicle compliance — making replacement essential for proper protection.
Why Replace or Upgrade Your Porsche Rear Seat Belts?
Replacing rear seat belts ensures the highest level of passenger safety and restores the interior’s functionality and appearance. Upgraded designs also provide modern materials, smoother operation, and compatibility with Porsche interiors old and new.
Key Benefits:
• Restores passenger safety and comfort.
• Ensures compliance with safety regulations and MOT standards.
• Eliminates retraction issues and mechanical sticking.
• Available in standard 3-point and classic lap belt designs.
• Fits Porsche 911, 944, 968, Boxster, Cayman, and 718 models.
• Ideal for restorations, safety upgrades, or seat conversions.
Design911’s Porsche rear seat belt range combines safety engineering, durability, and authentic Porsche fitment — ensuring complete protection and performance.
Highlights
• Premium Porsche rear seat belts, harnesses, and hardware.
• Engineered for strength, comfort, and precision fit.
• UV- and abrasion-resistant webbing for long service life.
• Easy to install and compatible with original mounting points.
• Available in various colours and lengths to suit all models.
• Perfect for restoration, maintenance, and safety upgrades.
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed