Please wait…

Please wait while we process your order,
do not press the back button…

Original Porsche Part Genuine Porsche part 99905208700

Code: 99905208700

Genuine Porsche part

Original Porsche Part

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

3 3 3

Four point bearing. Porsche 911 1974-86 (915 Gearbox)

99905203000/1

Product Information

Four Point Bearing.
The OE Match Four Point Bearing is a high-quality precision-engineered bearing designed to support both radial and axial loads within critical Porsche mechanical assemblies. Manufactured to OE specifications for fit, performance and durability, this four-point contact bearing is designed to provide smooth rotational movement while maintaining accurate component alignment under varying operating conditions.

Fits:

Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Porsche 911 1978-1983 3.0L / SC
Porsche 911 1984-1986 3.2L

Diagram Ref No 18

Featuring a specialised internal design that allows load distribution across four contact points, this bearing can accommodate forces acting in multiple directions while reducing friction and wear. Constructed from high-grade bearing steel and engineered for long service life, it plays a vital role in maintaining the reliability and efficiency of the components in which it is installed.

What This Product Does:

Supports rotating components under radial and axial loads.
Maintains precise alignment within mechanical assemblies.
Reduces friction between moving parts.
Distributes loads evenly across multiple contact points.
Allows smooth and efficient rotational movement.
Minimises wear on associated components.
Contributes to reliable operation and long-term durability.

Symptoms Of Wear Or Failure:

Grinding, rumbling or humming noises during operation.
Excessive vibration from the affected assembly.
Increased mechanical resistance or rough movement.
Component misalignment or excessive play.
Premature wear of surrounding components.
Overheating caused by increased friction.
Reduced performance of the supported assembly.
Metal particles or bearing debris found during inspection.
Complete bearing seizure in severe failure cases.

Why Replacement Matters:

Bearings are subjected to constant rotational forces, load changes, vibration and environmental contamination throughout their service life. Over time, wear of the bearing races, rolling elements or cage assembly can reduce bearing performance and compromise component alignment.
A failing bearing can increase friction, generate excessive heat and place additional stress on surrounding mechanical components. If left unresolved, bearing failure can result in significant damage to shafts, housings and related assemblies, leading to costly repairs and unexpected downtime.
Replacing a worn four point bearing restores smooth operation, maintains correct load support and helps protect associated components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and dependable long-term durability, ensuring reliable performance and maintaining the engineering standards expected of your Porsche.

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

99905203000

99905203000

313 09 754

313097540322

99905203000

31309754

The product you are viewing cross references to these numbers

3 3 3

Transmission main shaft bearing, Four-point. Porsche 964

99905209801/1

Product Information

Transmission main shaft bearing, Four-point.
This four-point contact bearing is used in the manual transmission main/input shaft area on Porsche 964 applications. Four-point contact bearings are designed to manage combined loads in compact packaging - supporting stable shaft positioning and smooth rotation under varying operating conditions.

Fits:
Porsche 964 1989 - 1994

Diagram ref no 16

A worn bearing can introduce vibration, noise, imprecise shifting, and accelerated wear of related transmission components. Replacing it during gearbox servicing helps restore smooth operation, correct shaft support, and long-term reliability - especially important on performance-oriented drivetrains like the Porsche 964.

It supports the transmission main shaft and helps keep internal gear alignment stable under load. By maintaining correct shaft position, it reduces friction, noise, and wear - supporting smoother shifting and consistent drivetrain performance.

Function:
• Provides precise main/input shaft support inside the gearbox
• Helps manage axial and radial loads through four-point contact design
• Maintains correct gear mesh alignment to reduce wear and noise
• Supports smooth rotation and consistent transmission performance

Transmission bearings are critical to shaft stability and gear alignment. If this bearing wears, it can lead to whining noises, vibration, shifting issues, and increased wear on gears and synchros. Replacing it with an OE Match bearing helps restore gearbox integrity and protects more expensive transmission components.

When to replace:
• Gearbox whining, rumbling, or grinding noises
• Vibration or roughness that changes with speed/load
• Excessive shaft play found during teardown/inspection
• During gearbox rebuild/overhaul (preventative replacement)
• Visible pitting, heat marks, or rough rotation on the bearing

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

99905209801

99905209800

99905209801

99905209400

99905208700

The product you are viewing cross references to these numbers

Four point gearbox bearing. Porsche 911 65-83

9990520160A/1

Product Information

Four point gearbox bearing.
A four-point contact bearing inside the gearbox housing that supports the pinion / differential or output shaft, maintaining correct alignment and rotational support under load. It is a critical structural component of the transmission case on classic 911 / 914 gearboxes. Sold as a single bearing unit - replace as needed when rebuilding or servicing the gearbox, or when diagnosing shaft play or bearing wear.

Fits:
Porsche 911 1965 - 1971 Manual Gearbox cars
Porsche 911 1965 - 1983 Sportomatic Gearbox cars
Porsche 914 1970 - 1976 Manual and Sportomatic gearboxes

This bearing replaces the factory-installed unit (or previous equivalent bearing - OE part number 99905201600) and restores proper gearbox support for shafts that transmit torque and rotational forces - vital for gearbox longevity and reliable shifting.

Gearbox bearings wear out over time from torque loads, heat, and repeated cycles. A worn or damaged four-point bearing may lead to:
• Shaft misalignment or excessive play
• Increased gear noise, whining or rumbling
• Premature wear on shafts, gears, or synchros
• Gearbox instability or failure under load

Replacing with a correctly spec’d bearing restores shaft integrity, ensures smooth power transmission, and helps prevent costly internal damage - especially important on vintage 911 and 914 gearboxes where early detection can save major rebuilds.

You should consider replacing this bearing if:
• There is noticeable shaft play or wobble in the gearbox output or pinion shaft
•  You hear whining, rumbling, or unusual noise from the gearbox under load
•  The gearbox has high mileage or has seen hard use
•  You are performing a gearbox rebuild, overhaul, or restoration
•  Internal inspection reveals bearing wear, scoring, or heat damage

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

9990520160A

9990520160A

99905201600

The product you are viewing cross references to these numbers

Enter your VAT number here and click Verify:

Original Porsche Part Genuine Porsche part 99905208700