Shock absorber spacer sleeve. Porsche 993 Carrera RS  ›  99333346680

Rear shock mount washer, 12,5 x 19,1 x 3
The Porsche Genuine OE Rear Shock Mount Washer is an original factory suspension mounting washer / strut mount washer used within the rear shock absorber mounting assembly on a range of Porsche performance models.
Sold individually, 2 required per vehicle

Fits:
Porsche 997.1 2005 - 2008 All models
Porsche 997.2 2009 - 2012 All models
Porsche 991.1 2012 - 2016 All models
Porsche 991.2 2017 - 2019 All models
Porsche 918 Spyder 2015

The washer sits within the rear shock absorber mounting assembly and helps evenly distribute clamping force between the shock absorber, mounting hardware, and supporting plates.

Its role is essential in maintaining:
•   Correct shock absorber positioning
•   Stable suspension mounting geometry
•   Reduced stress on suspension components
•   Proper load transfer through the rear suspension system

This small component plays an important role in ensuring reliable suspension operation under both normal driving and high-performance conditions.

Functions & Technical Role
•  Load distribution: Spreads mounting force evenly across the suspension assembly
•  Mounting support: Helps stabilise rear shock absorber mounting components
•  Suspension alignment: Maintains correct rear strut positioning
•  Vibration resistance: Reduces stress and movement within the suspension mount
•  OEM precision: Manufactured to Porsche factory specifications for exact fitment and durability

Fitment / Position on Car
•  Fitting position: Rear suspension
•  Location: Rear shock absorber / upper strut mounting assembly
•  System: Rear suspension and shock absorber mounting system

The washer helps maintain correct rear shock absorber mounting alignment and prevents uneven stress within the suspension assembly. Worn or damaged mounting hardware can affect suspension stability and long-term component durability.

When to replace
•  During rear suspension or shock absorber overhaul
•  Damaged, bent, or corroded mounting hardware
•  Suspension mount wear or movement
•  Accident or suspension impact damage
•  When replacing associated top mount components

Related reference numbers
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WHT008575

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Shock absorber bump stop. Rear axle.
The Porsche Genuine OE Rear Shock Absorber Bump Stop (Part No. 99133310502) is an original factory rear suspension buffer / additional spring element designed for Porsche 991 models equipped with PASM (Porsche Active Suspension Management). Mounted on the rear shock absorber assembly, this component acts as a protective cushion at the end of suspension travel, helping absorb heavy impacts and preventing the suspension from bottoming out. Porsche also refers to it as an additional spring or shock rubber stop.
Sold individually, 2 required -  fits left or right suspension strut

Fits:
For cars with PASM
Porsche 991.1 Carrera 2012 - 2016
Porsche 991.2 Carrera 2017 - 2019
Porsche 991 Turbo 2014 -2021

Diagram ref no 8

The bump stop compresses during extreme suspension movement, cushioning the suspension when the shock absorber approaches full compression. This helps protect the damper, spring assembly, and chassis from excessive impact forces.

On PASM-equipped vehicles, the bump stop also contributes to maintaining the correct suspension characteristics and ride quality under dynamic driving conditions.

Functions & Technical Role
• Suspension protection: Prevents harsh bottoming-out of the rear suspension
•  Impact absorption: Cushions heavy suspension compression loads
•  Ride quality support: Reduces harsh impacts and vibration transfer
•  PASM compatibility: Designed specifically for electronically controlled PASM suspension systems
•  OEM precision: Engineered to Porsche factory specifications for exact fit and damping characteristics

Performance-oriented Porsche suspensions often use progressive bump stops that function as a secondary spring during heavy suspension compression.

Fitment / Position on car
•  Fitting position: Rear axle
•  Location: Mounted on rear shock absorber / damper assembly
•  Side: Left = Right
•  System: Rear suspension and damping system

The rear bump stop protects the suspension and shock absorber from damage during heavy compression. It also helps maintain ride comfort, handling stability, and proper PASM suspension performance.

When to replace
•  Suspension bottoming-out or harsh rear impacts
•  Cracked, collapsed, or deteriorated foam/rubber
•  Knocking noises from the rear suspension
•  During shock absorber replacement or suspension overhaul
•  Reduced ride quality or suspension control

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

99133310502

The product you are viewing cross references to these numbers

Insert for rear shock top mount.

Fits:
Porsche 991.1 C2 / C2S / C4 / C4S / Turbo
Porsche 991.2 C2 / C2S / C4 / C4S / Turbo

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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

99133369101

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Shock absorber upper base
This Porsche Genuine OE Shock Absorber Upper Base is an original factory rear suspension mounting/support component designed for the Porsche 911 (991 generation). Also referred to as a support element, upper base, or upper spring/shock support, this component forms part of the rear shock absorber and coil spring assembly.
Sold individually, 2 required -  fits left or right suspension strut

Fits:
Porsche 991.1 Carrera 2012 - 2016
Porsche 991.2 Carrera 2017 - 2019
Porsche 991 Turbo 2014 - 2016 (I352 / I475)*
Porsche 991 Turbo 2017 - 2021 (I352 / I475)*

 * I352 - for cars with electronic damper control for PASM and PDCC
 * I475 - for cars with PASM electronic damper control

Diagram ref no 

The upper base supports the upper section of the rear shock absorber assembly, helping position and stabilise the suspension components within the rear axle setup. It works together with the shock absorber, spring, and mounting hardware to ensure proper damping operation, load distribution, and vibration isolation. On PASM-equipped cars, it also supports the electronically controlled damper system.

Functions & Technical Role
•  Suspension support: Provides upper mounting support for the rear shock absorber assembly
•  Load distribution: Helps distribute suspension forces into the chassis
•  Vibration control: Assists in reducing vibration transfer through the suspension system
•  PASM compatibility: Designed for Porsche Active Suspension Management systems
•  OEM precision: Manufactured to Porsche factory tolerances for exact fit and handling performance

Fitment / Position on car
•  Fitting position: Rear axle
•  Location: Upper section of rear shock absorber / spring assembly
•  System: Rear suspension / damping system

Suspension mounting components are constantly subjected to:
•  Road impacts
•  Suspension movement
•  Vibration and load transfer

Over time, wear or deterioration can lead to:
•  Suspension noise or knocking
•  Reduced ride quality
•  Excessive movement in the damper assembly
•  Poor handling stability

Replacing worn components with genuine Porsche OE parts restores correct suspension operation and preserves factory driving dynamics.

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

99133350400

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