O-ring. This part number supersedes to 99970729340 Genuine Porsche part 99970193740

Code: 99970193740

Genuine Porsche part

O-ring. This part number supersedes to 99970729340

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

O-ring power steering pump drive train 40x4. Porsche 964 / 993

99970729340

Product Information

O-ring power steering pump drive train
Genuine Porsche OE O-ring for the power steering pump drive train on Porsche 964 and 993 models. This original Porsche 40 x 4 mm O-ring seals the power steering pump drive / camshaft drive housing area, helping prevent fluid or oil leakage from the power steering drive assembly.
Sold individually

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

Diagram ref no 3

What This Part Does / Functions
•  Seals the power steering pump drive housing connection
•  Helps prevent leaks from the pump drive / camshaft drive area
•  Maintains correct sealing around the power steering pump drive train
•  Supports reliable power steering pump operation
•  Replaces a hardened, flattened, cut or leaking original O-ring
•  Provides correct OE Porsche size, material and fitment
•  Supports correct reassembly after power steering pump or drive housing service
•  Helps maintain factory sealing performance.

Why Replace This Part?
O-rings are exposed to heat, oil, fluid, pressure changes and age-related hardening. Over time, the rubber can flatten, crack, swell or lose elasticity. Once the power steering pump drive housing is removed or disturbed, the O-ring should normally be replaced to ensure a reliable seal when reassembled. Replacing it with a Genuine Porsche OE 40 x 4 mm O-ring helps restore the correct seal and reduce the risk of leaks around the power steering pump drive assembly.

Common Symptoms of a Failed O-Ring
•   Fluid or oil leakage near the power steering pump drive area
•   Residue around the camshaft / power steering pump housing joint
•   Power steering pump area seepage
•   Hardened, flattened or cracked O-ring during inspection
•   Persistent leak after previous pump service
•   Oil smell from hot engine components
•   Fluid drips underneath the rear of the engine area
•   Seal damage after power steering pump removal.

When to Replace This Part
•   When removing or refitting the power steering pump drive housing
•   During power steering pump service or replacement
•   If leakage is found around the pump drive / camshaft seal area
•   If the O-ring is hardened, flattened, cracked or damaged
•   During engine or power steering system repair
•   When resealing the power steering pump drive assembly
•   After separating the power steering housing from the camshaft drive area

Where It Fits on the Car
This O-ring fits in the power steering pump drive train / camshaft drive housing area. It seals the joint between the power steering pump drive housing and the engine drive location on compatible Porsche 964 and 993 models. Correct installation is important. The sealing surfaces should be clean, and the O-ring should be fitted without twisting, pinching or damage.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99970729340

99970193740

99970729340

The product you are viewing cross references to these numbers

O-ring power steering pump drive train 40x4. Porsche 964 / 993

99970729340/1

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
Related, superseded, cross reference or alternative numbers for comparison.

99970729340

99970193740

99970729340

The product you are viewing cross references to these numbers

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O-ring. This part number supersedes to 99970729340 Genuine Porsche part 99970193740