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99970729340/1
Product Information
Product Information
O-ring power steering pump drive train
OE Match O-ring for power steering pump drive train, 40 x 4, for Porsche 964 and 993 models. This replacement sealing O-ring helps prevent oil or fluid leakage around the power steering pump drive area and supports correct drivetrain sealing during service or repair.
Sold individually

Fits:
Porsche 964 1989 -1994
Porsche 993 1994 - 1998

Diagram ref no 3

The O-ring seals the power steering pump drive train connection to help prevent fluid seepage and maintain system integrity. A correctly fitted seal helps keep the pump drive area clean, reduces leakage risk, and supports reliable power steering system operation.

Functions
•  Replaces the power steering pump drive train
•  O-ring Seals the pump drive train connection
•  Helps prevent fluid leaks and seepage
•  Supports correct power steering system sealing
•  Suitable for pump drive, steering system, or engine bay service
•  Replaces hardened, flattened, cracked, swollen, or damaged
•  O-rings OE Match replacement for Porsche 964 and 993 power steering repair

Why Replace This Part?
O-rings can harden, flatten, crack, swell, or lose sealing ability due to age, heat, fluid exposure, pressure cycles, and vibration. A worn or damaged O-ring may allow oil or power steering fluid seepage around the drive train area, causing residue, fluid loss, contamination, or failed inspection. Replacing the O-ring helps restore proper sealing and helps prevent repeat leaks.

When to Replace This Part
•    Fluid seepage is present around the power steering pump drive area
•    The power steering pump or drive train components have been removed
•    The original O-ring is hard, flattened, cracked, swollen, or damaged
•    Power steering system sealing work is being carried out
•    Engine bay fluid residue is visible near the pump drive assembly
•    Preventative replacement is required during steering system service
•    The vehicle is undergoing Porsche 964 or 993 restoration

Where it fits on the car
This O-ring fits within the power steering pump drive train / pump drive sealing area on Porsche 964 and 993 models. It forms part of the power steering pump drive sealing arrangement.

Related reference numbers
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99970729340
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