Rear coil spring spacer. Porsche 991.1 / 991.2  ❭  99133351100

Rear coil spring spacer
This Porsche Genuine OE Rear Coil Spring Spacer is an original factory rear suspension spring spacer / insulator insert designed for Porsche 911 (991.1 and 991.2) models. Installed within the rear suspension assembly, this component sits between the coil spring and suspension mounting surface to provide correct positioning, vibration isolation, and load distribution. Porsche also refers to this part as a spring insert, spring seat, or spring insulator.
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

The rear coil spring spacer cushions and isolates the coil spring from the suspension mounting points, helping reduce vibration and suspension noise while ensuring proper spring alignment.

 It also helps maintain the correct ride height and suspension geometry by distributing load evenly through the rear suspension assembly.

Functions & Technical Role
•  Spring insulation: Reduces vibration and noise transfer through the suspension
•  Load distribution: Supports proper seating of the rear coil spring
•  Ride height support: Helps maintain correct suspension geometry
•  Suspension protection: Reduces stress between spring and mounting surfaces
•  OEM precision: Engineered to Porsche specifications for exact fitment and durability

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

The spring spacer helps reduce suspension vibration and prevents metal-to-metal contact between the coil spring and mounting surfaces. It also supports correct ride height and suspension performance.

When to replace
•  Suspension noise or creaking from the rear axle
•  Collapsed, cracked, or worn spring insulator
•  Uneven spring seating or ride height
•  During rear suspension or shock absorber overhaul
•  Excessive vibration transferred into the chassis

Related reference numbers
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99133351100

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