Control Arm Lock Nut, M12 x 1,5. Porsche 993 / 996 / 997 / 991 / Boxster / Cayman  ❭  99908444909

Control Arm Lock Nut M12 x 1.5 – Arm to Wheel Carrier
This OE Match control arm lock nut is an M12 x 1.5 securing nut used on the suspension assembly of various Porsche models. It is designed for the control arm-to-wheel carrier connection, providing an OE-style fit and secure fastening performance.
Sold individually, Quantity required depends on the vehicle model.

Fits:
Porsche 993 1995 - 1998  (Front & Rear)
Porsche 996 1998 - 2005  (Front & Rear)
Porsche 996 Turbo 2000 - 2005  (Front & Rear)
Porsche 996 GT3 1999 - 2005 (Rear)
Porsche 997.1 2005 - 2008  (Front & Rear)
Porsche 997.2 2009 - 2012  (Front & Rear)
Porsche 997 Turbo 2007 - 2013  (Front & Rear)
Porsche 997 GT3  (Front & Rear)
Porsche 991.1 2012 - 2016 (Front)
Porsche 991.2 2017 - 2019 (Front)
Porsche 991 Turbo 2014 - 2020 (Front)
Porsche 991 GT3 (Front)
Porsche Boxster 986 1997 - 2004 (Front)
Porsche Boxster 987.1 2005 - 2008  (Front & Rear)
Porsche Boxster 987.2 2009 - 2012  (Front & Rear)
Porsche Boxster 981 2012 - 2016  (Front & Rear)
Porsche Boxster 982 (718) 2017 >> (Front)
Porsche Cayman 987C.1 2005 - 2008  (Front & Rear)
Porsche Cayman 987C.2 2009 - 2012  (Front & Rear)
Porsche Cayman 981C 2012 - 2016  (Front & Rear)
Porsche Cayman 981C GT4 2016 (Front)
Porsche Cayman 982C (718C) 2017 >> (Front)

Diagram ref no 22 (Front)
Diagram ref no 14 (Rear)

The lock nut fastens the control arm to the wheel carrier, helping keep the suspension arm securely mounted in its correct position. This connection is important for maintaining suspension geometry, wheel alignment, and stable handling.  Depending on the model, it may be used on front or rear suspension arm connections where Porsche specifies an M12 x 1.5 locking nut.

Functions
•  Secures the control arm to the wheel carrier
•  Helps maintain correct suspension alignment and geometry
•  Supports stable wheel location during driving, braking, and cornering
•  Helps prevent loosening caused by road vibration and suspension movement
•  Provides a secure OE Match replacement for the original lock nut
•  Suitable for suspension repair, control arm replacement, or wheel carrier service

Suspension lock nuts are safety-critical fasteners and may lose locking strength after removal. They can also become corroded, damaged, rounded, or worn over time. Replacing the lock nut during suspension work helps ensure the control arm is secured correctly and reduces the risk of loosening after reassembly.

When to replace
•  This Part The control arm has been removed or replaced
•  The wheel carrier or suspension arm connection has been dismantled
•  The original nut is corroded, damaged, rounded, or seized
•  The nut no longer tightens or locks correctly
•  Suspension repairs or alignment-related work are being carried out
•  There is play, looseness, or noise from the control arm mounting area
•  As recommended during service where single-use locking hardware is removed

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

99908444909

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