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Rear Control arm (Slim Type) 'Coffin arm' - With Lower Ball Joint. Porsche 987 / 981 / 718 (982) Cayman & Boxster / 997 Carrera/Turbo/GT2/GT3 - 98133105302
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98133105302/2
Product Information
Product Information
Slim-Type Rear Control Arm (also known as "Coffin Arm") with Lower Ball Joint. 
The rear control arm (also known as the “coffin arm”) slim type, with lower ball joint) is designed for the rear axle of multiple Porsche models including the 987 Boxster/Cayman, 981 Boxster/Cayman, 718 (982) Boxster/Cayman and 997-series Carrera, Turbo and GT2/GT3.
Sold individually - price is per unit. 

rear
Porsche 997 Turbo / GT2 (Excl. RS) 2007 - 2013
Porsche 997 GT3 (Excl. RS) 2007 - 2011
Porsche 997.2 Carrera 2009 - 2012
Porsche 987.2 Boxster 2009 - 2012
Porsche 987.2 Cayman 2009 - 2012
Porsche 981 Boxster / S 2012 - 2016
Porsche 981 Cayman / S 2014 - 2016
Porsche 981 Boxster Spyder 2016
Porsche 718 (982) Boxster 2017>>
Porsche 718 (982) Cayman 2017>>

Must be replaced in pairs
Porsche 997.1 Carrera 2007 - 2009
Porsche 987.1 Boxster 2007 - 2008
Porsche 987.1 Cayman 2007 - 2008

 Position on Vehicle: Rear axle, control arm position linking rear wheel carrier / suspension to chassis, controlling camber, toe and lateral track stability.

Cross-Reference / Alternative Numbers: OE ref part 981 331 053 02; also referenced 99733105301 / 99733105302 / 99733105303 /  98133105300 / 98133105301.

Built to meet factory specification and supplied with a premium ball joint, it restores accurate alignment, improves handling precision and ensures long-term durability.

The rear control arm is a critical component in maintaining rear axle geometry, wheel alignment, and dynamic stability under acceleration, cornering or load. A worn, bent or loose control arm can lead to:
  Rear instability or wandering at speed
  Uneven or rapid tyre wear on the rear axle
  Clunking or knocking noises from the rear suspension
  Loss of alignment control (camber/toe drift).

Replacing the arm ensures the rear suspension operates as intended, restoring precision and safety.

When and why to replace:
You hear a pronounced knock or clunk from the rear suspension when hitting bumps or changing direction.
Rear tyres wear unevenly or you cannot hold rear alignment specification.

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Related, superseded, cross reference or alternative numbers for comparison.

98133105302
99733105302
99733105303
98133105301
98133105300

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