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Porsche > 991 (911) MK2 2016-2019 > 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19 > Suspension & Axle > Shock Absorber Parts REAR >

Rear coil spring spacer. Porsche 991.1 / 991.2  ❭  99133351100

Rear coil spring spacer. Porsche 991.1 / 991.2 - 99133351100 - 104022
4
Related to Shock Absorber Parts REAR for 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
99133351100/1
Product Information
Product Information
Rear coil spring spacer
This Rear Coil Spring Spacer is an OE-style rear suspension spacer designed for Porsche 991.1 and 991.2 models. It is fitted within the rear suspension spring assembly to support correct spring positioning, ride height, and suspension alignment.
Sold individually, 2 required -  fits left or right suspension strut

Fits:
Porsche 991.1 Carrera 2012 - 2016
Porsche 991.2 Carrera 2017 - 2019

Porsche 991.1 Turbo 2014 - 2016*
* option code: 352 - Electronic damper control for PASM and PDCC
* option code: 475 - PASM electronic damper control

Porsche 991.1 Turbo 2017-20

Diagram ref no 4

This component is commonly replaced during suspension refurbishment, spring replacement, or preventative maintenance to restore proper rear suspension operation and eliminate unwanted suspension noise or uneven ride height.

The rear coil spring spacer supports and positions the rear coil spring within the suspension assembly. It helps maintain correct ride height, reduces vibration and noise, and ensures stable suspension operation under varying driving conditions.

Function
• Positions and supports rear coil spring correctly
• Maintains proper rear ride height and suspension geometry
• Reduces vibration and suspension noise
• Prevents metal-to-metal contact within suspension assembly
• Helps distribute suspension loads evenly

Over time, suspension spacers can compress, crack, or deteriorate due to repeated suspension movement, load stress, and environmental exposure. A worn spacer may cause suspension noise, uneven ride height, poor spring seating, or increased vibration. Replacing worn spring spacers restores proper suspension support, ride comfort, and chassis stability.

When to replace
•  Suspension squeaks or knocking noises
•  Uneven rear ride height
•  Visible cracking or deformation of spacer
•  During coil spring or shock absorber replacement
•  Preventative maintenance during suspension overhaul

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Related, superseded, cross reference or alternative numbers for comparison.

99133351100
99133351100

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Related products
Rear shock mount washer. Porsche 997 / 991 / 918 Spyder - 99902527102, WHT008575
2
Rear shock mount washer. Porsche 997 / 991 / 918 Spyder
Special Order item
WHT008575
Product Information
Product Information
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
Related, superseded, cross reference or alternative numbers for comparison.

WHT008575
99902527102
WHT008575

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Shock absorber bump stop, Rear. Porsche 991 PASM - 99133310502
5
Shock absorber bump stop, Rear. Porsche 991 PASM
Special Order item
99133310502
Product Information
Product Information
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
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99133310502
99133310502

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Rear shock top mount insert. Porsche 991 - 99133369101
3
Rear shock top mount insert. Porsche 991
Special Order item
99133369101
Product Information
Product Information
Insert for rear shock top mount.

porsche

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
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99133369101
99133369101

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