Rear lower control arm adjust bolt. Porsche 996 / 997 / Boxster / Cayman

Rear lower control arm adjust bolt. M12 x 83.
This bolt acts as the eccentric adjustment for the rear lower control arm’s mounting point. By rotating the bolt within its mount, camber and/or toe angles can be fine-tuned. It ensures the rear wheel geometry can be set to factory specification and maintained under load or after suspension work.
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Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005- 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2006 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 996 Carrera 1998 - 2005
Porsche 996 Turbo 2001 - 2005 (not for GT2 models)
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997 GT3-2 2007 - 2011
Porsche 997.2 Carrera 2009 - 2012
Porsche 997.2 Turbo 2010 - 2013

Diagram ref no 15

This high-precision adjustment bolt is engineered to the specifications of the original Porsche part (supersedes 99633121702). It's designed to facilitate the correct camber and toe adjustment of the rear lower control arm on Porsche models including the 996, 997, Boxster and Cayman. Its calibrated threads and dimensions ensure accurate alignment and ensure durable and precise suspension correction.

• Fitment: Rear lower control arm mount—adjustment point for alignment, especially after bushing replacement or arm removal

Rear suspension alignment is vital for handling precision, tire wear and safety. Over time, original adjustment bolts may become stretched, corroded, or damaged from repeated removal and alignment work. A compromised bolt can make accurate alignment difficult, lead to uneven tire wear, and affect vehicle dynamics.

Replacing with a new bolt restores the correct adjustment range and clamping force - ensuring your Porsche’s rear end remains properly aligned and fully controllable. When to replace:
• After performing rear suspension removal, control arm or bushing replacement
• If the existing bolt shows signs of corrosion, thread damage or deformation
• When tires exhibit uneven wear or vehicle exhibits unusual handling at the rear

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Related, superseded, cross reference or alternative numbers for comparison.

99733121702

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