Shock absorber concave washer, Lower Rear. Porsche 997 / 991 › 99733351300

This OE Match lower rear shock absorber concave washer forms part of the spring and damper assembly on the Porsche 997 / 991 applications listed below. Also described as a spring disc, it provides a shaped seating surface within the assembly.

Fits

• Porsche 997.1 C2 / C2S 2005–08 (I029 / I475)
• Porsche 997 MK1 Carrera 2 3.6L 2005–08
• Porsche 997 MK1 Carrera 2S 3.8L 2005–08
• Porsche 997.1 C4 / C4S 2005–08 (I029 / I475)
• Porsche 997 MK1 Carrera 4 3.6L 2005–08
• Porsche 997 MK1 Carrera 4S 3.8L 2005–08
• Porsche 997.1 Turbo 2007–09
• Porsche 997 MK1 TURBO 2007–09
• Porsche 997.2 C2 / C2S 2009–12 (I475)
• Porsche 997 MKII Carrera C2 3.6L 2009–12
• Porsche 997 MKII Carrera C2S 3.8L 2009–12
• Porsche 997.2 C4 / C4S 2009–12
• Porsche 997 MKII Carrera C4S 3.8L 2009–12
• Porsche 997 MKII Carrera C4 3.6L 2009–12
• Porsche 991.1 Carrera 2012–16 (I029 / I352 / I475 / I477)
• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012–16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012–16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012–16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012–16
• Porsche 991.2 Carrera 2017–18 (I352 / I475 / I477)
• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016–19
• Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016–19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016–19
• Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016–19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016–19
• Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016–19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016–19
• Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016–19
• Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016–19
• Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016–19

The chassis-option qualifications above apply to the corresponding model applications.

(I029) For cars with Standard chassis
(I475) For cars with PASM Electronic damper control
(I352) For cars with Electronic damper control for PASM and PDCC
(I477) For cars with PASM w/o lowering

Check fitment for your specific vehicle (model, year, engine) before ordering.

Required Quantity
Two washers are specified across the rear shock absorber and coil spring assemblies for the applicable chassis configurations.

What Is This Part?
This is the lower concave washer used within the rear shock absorber and coil spring assembly. Its dished shape provides a seating surface for the adjoining components, so its profile and fitted orientation matter when the assembly is rebuilt. It works alongside the damper, spring and associated seating hardware rather than providing damping itself. OE Match is a Porsche-focused replacement-parts brand; this washer should be selected against the vehicle's chassis equipment as well as its model and year.

What Does This Part Do?

• Provides a shaped seat: Forms the lower spring-disc interface within the applicable rear suspension assembly.
• Supports correct assembly: Works with the adjoining spring and damper hardware in their intended arrangement.
• Maintains the seating profile: Provides the concave contact surface required at this position.

Why Replace This Part?
Replacement may be appropriate if inspection finds corrosion, cracking, distortion or damage to the seating surface. A washer that has lost its intended shape may no longer sit correctly against the adjoining components, so it should be assessed when the rear spring and damper assembly is dismantled.

Renewing a damper does not automatically mean this washer must be replaced. Check its condition alongside the spring seats, mounts and other hardware, and replace any component that is damaged or unsuitable for reuse. Rear suspension noise should be traced to its cause rather than assumed to come from this washer.

When to Replace This Part?

• Visible deterioration: Significant corrosion, cracking or loss of material around the seating surface.
• Distorted profile: Bending, flattening or other damage that prevents correct seating.
• Damaged contact areas: Pronounced wear or fretting where the washer meets adjacent components.
• Incorrect or missing hardware: Inspection confirms that the lower washer is absent or the wrong version has been fitted.
• During suspension dismantling: Inspect the washer when access is available and replace it if its condition makes reuse unsuitable.

Where Is This Part Fitted?
Location: Within the rear shock absorber and coil spring assembly, at the lower concave washer or spring-disc position. Retain the correct component order and orientation when rebuilding the assembly.

Product Summary

• Product: Lower rear shock absorber concave washer / spring disc.
• Brand: OE Match.
• Part reference: 99733351300.
• Purpose: Provides a shaped seating surface within the rear spring and damper assembly.
• Selection: Match the vehicle application and chassis-option codes before ordering.

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

99733351300

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