Caliper Bolts / Disc Screws

Brake Caliper Mounting Bolt - M12 x 1.5 x 85.
2x Bolts required per Caliper

Sold each Ensure your Porsche braking system remains securely assembled with this brake caliper mounting bolt Designed to secure the brake caliper firmly to the suspension upright, this high-strength fixing is manufactured to meet the demanding loads experienced during everyday driving, spirited road use and high-performance braking.

• Porsche Boxster S 987 MKII 3.4L 2009-12 - with PCCB
• Porsche Cayman S / R 3.4L 987C MKII 2009-12 - with PCCB
• Porsche Boxster 981 Spyder 3.8L 2016 - with and without PCCB
  
• Porsche Boxster 981 2.7L 2012-16 - with PCCB
• Porsche Boxster 981 S / GTS 3.4L 2012-16 - with PCCB
• Porsche Cayman S / GTS 3.4L 981 2013-16 - with and without PCCB
  

• Porsche Boxster 981 2.7L 2012-16 – without PCCB
• Porsche Boxster 981 S / GTS 3.4L 2012-16 – without PCCB
• Porsche Cayman GT4 3.8L 2015-16 - with and without PCCB
  
• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>> - with and without PCCB
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>> - with and without PCCB
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>> - with and without PCCB
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>> - with and without PCCB
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>> - with and without PCCB
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>> - with and without PCCB
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>> - with and without PCCB
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>> - with and without PCCB
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>> - with and without PCCB
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>> - with and without PCCB
• Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>> - with and without PCCB
• Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>> - with and without PCCB
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>> - with and without PCCB
  
• Porsche Cayman 718 2.0L Manual (300 Bhp) - with and without PCCB
• Porsche Cayman 718 2.0L PDK (300 Bhp) - with and without PCCB
• Porsche Cayman S 718 2.5L Manual (350 Bhp) - with and without PCCB
• Porsche Cayman S 718 2.5L PDK (350 Bhp) - with and without PCCB
• Porsche Cayman T 718 2.0L Manual (300 Bhp) - with and without PCCB
• Porsche Cayman T 718 2.0L PDK (300 Bhp) - with and without PCCB
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp) - with and without PCCB
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp) - with and without PCCB
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp) - with and without PCCB
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp) - with and without PCCB
• Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L - with and without PCCB 

• Porsche Boxster 987 S 3.2/3.4L 2005-08/08 – with PCCB
• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>> – with PCCB
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>> – with PCCB
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>> – with PCCB
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>> – with PCCB
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>> – with PCCB
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>> – with PCCB
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>> – with PCCB
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>> – with PCCB
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>> – without PCCB
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>> - without PCCB
• Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>> - with PCCB
• Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>> - without PCCB
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>> - without PCCB
  
• Porsche Cayman 718 2.0L Manual (300 Bhp) - with PCCB
• Porsche Cayman 718 2.0L PDK (300 Bhp) - with PCCB
• Porsche Cayman S 718 2.5L Manual (350 Bhp) - with PCCB
• Porsche Cayman S 718 2.5L PDK (350 Bhp) - with PCCB
• Porsche Cayman T 718 2.0L Manual (300 Bhp) - with PCCB
• Porsche Cayman T 718 2.0L PDK (300 Bhp) - with PCCB
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp) - with PCCB
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp) - with PCCB
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp) - without PCCB
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp) - without PCCB
  
• Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L - with PCCB

Diagram ref no 8

Whenever brake calipers are removed for servicing, pad replacement, disc replacement or caliper refurbishment, it is good practice to inspect the mounting bolts for wear, corrosion or thread damage. Replacing worn or damaged fasteners helps maintain correct clamping force and supports safe, reliable brake operation.

Manufactured from high-grade steel with the correct dimensions and thread specification, this mounting bolt provides a secure and dependable fit for a wide range of modern Porsche models.

What Does the Brake Caliper Mounting Bolt Do?

The brake caliper mounting bolt fastens the brake caliper securely to the hub carrier or suspension upright. It is responsible for maintaining the precise alignment of the caliper while resisting the significant braking forces generated under heavy deceleration.

Why Replace the Brake Caliper Mounting Bolt?

Brake mounting bolts experience repeated heat cycles, vibration and extremely high clamping loads. Over time they may suffer from:

• Corroded or damaged threads
• Wear from repeated removal and installation
• Loss of protective coating
• Incorrect torque from previous servicing
• Stretch or fatigue after extended use

Replacing the bolt during brake maintenance helps ensure the caliper remains securely mounted.

Common Symptoms of a Worn or Damaged Mounting Bolt

• Damaged or stripped threads
• Corrosion on the bolt shank or head
• Difficulty achieving correct torque
• Caliper movement due to incorrect fastening
• Fastener showing signs of previous over-tightening

Features

• Direct replacement brake caliper mounting bolt
• High-strength steel construction
• Precision manufactured for accurate fitment
• Designed for demanding braking loads
• Ideal during brake disc, pad or caliper replacement
• Helps maintain correct brake caliper alignment
• Suitable for road and performance applications       

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

9A700758500

The product you are viewing cross references to these numbers

Brake caliper mounting bolt, M12 x 1.5 x 72
OE Genuine Porsche brake caliper mounting bolt for various Porsche Boxster, Cayman, 911 / 993, 996 and 997 models. This original Porsche caliper bolt is used to secure the brake caliper to the hub carrier / suspension upright, helping maintain correct caliper positioning and safe braking performance.
2 x Bolts required per caliper. Fits FRONT & REAR calipers

Fits:
Porsche 993 C2 / C4 1995 - 1998 - Front only (Not widebody)
Porsche 996 C2 / C4 1998 - 2005 - (Not widebody)
Porsche 997 C2 / C4 3.6L 1998 - 2005

Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016 - (REAR only)
Porsche 718 (982) Boxster 2017 >> - (REAR only)

Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981C Cayman 2013 - 2016 - (REAR only)
Porsche 718 (982) Cayman 2017 >>  - (REAR only)

Diagram ref no 8

This product supersedes Porsche's old part numbers: 90006729209, 99906704109, 99906704101

This bolt is used on various Porsche brake caliper applications, depending on model and axle position.

What This Part Does / Functions
• Secures the brake caliper to the hub carrier / upright
•  Maintains correct caliper alignment over the brake disc
•  Helps ensure consistent braking performance
•  Supports safe operation of the hydraulic brake system
•  Provides correct OE Porsche thread, length and strength specification
•  Replaces worn, damaged, corroded or previously removed caliper bolts
•  Helps prevent caliper movement caused by incorrect or worn hardware
•  Maintains factory Porsche brake system fitment and quality.

Why Replace This Part?
Brake caliper mounting bolts are safety-critical fasteners. They are exposed to high braking loads, heat cycles, road debris, corrosion and repeated service removal. If a bolt is stretched, damaged, corroded, rounded or incorrectly reused, it may not clamp the caliper securely. Replacing caliper bolts with OE Genuine Porsche hardware helps ensure the brake caliper is fastened correctly using the proper factory specification.

When to Replace This Part
•  When removing or replacing a brake caliper
•  During brake caliper refurbishment or upgrade work
•  If the original bolt is corroded, seized, rounded or damaged
•  If the bolt threads are worn or contaminated
•  During front or rear brake overhaul
•  If the caliper mounting hardware is missing or incorrect

Where It Fits on the Car
This bolt fits at the brake caliper mounting point, securing the caliper to the suspension upright / hub carrier. Depending on the vehicle application, it may be used on the front calipers, rear calipers, or both.

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

99907340201

The product you are viewing cross references to these numbers

Brake caliper mounting bolt, M12 x 1.5 x 72
OE Match brake caliper mounting bolt for Porsche 993, 996, 997.1, Boxster, and Cayman models. These replacement caliper fixing bolt help secure the brake caliper to the carrier or hub assembly during brake system service.
2 x Bolts required per caliper. Fits FRONT & REAR calipers

Fits:
Porsche 993 C2 / C4 1995 - 1998 - Front only (Not widebody)
Porsche 996 C2 / C4 1998 - 2005 - (Not widebody)
Porsche 997 C2 / C4 3.6L 1998 - 2005

Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016 - (REAR only)
Porsche 718 (982) Boxster 2017 >> - (REAR only)

Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981C Cayman 2013 - 2016 - (REAR only)
Porsche 718 (982) Cayman 2017 >>  - (REAR only)

Diagram ref no 8

This product supersedes Porsche's old part numbers: 90006729209, 99906704109, 99906704101

Brake caliper mounting bolts hold the caliper firmly in position so the brake pads can clamp the disc correctly. Secure caliper mounting is essential for safe braking performance, pedal feel, pad contact, and reliable brake operation.

Functions
•  Replaces brake caliper mounting bolts
•  Secures the brake caliper assembly
•  Helps maintain correct caliper alignment
•  Supports safe brake pad and disc contact
•  Used during brake caliper, brake pad, or brake disc service
•  Replaces corroded, rounded, stretched, damaged, or missing original bolts
•  OE Match replacement fasteners for Porsche brake system repair.

Why Replace This Part?
Brake caliper mounting bolts are exposed to high braking loads, heat, road dirt, corrosion, and repeated service work. Worn, damaged, corroded, or stretched bolts may not provide correct clamping force and can compromise caliper security. Replacement is recommended when the bolts are removed during brake service or when their condition is uncertain.

When to Replace This Part
•   Brake calipers are being removed or replaced
•   Brake pads or brake discs are being serviced
•   The original bolts are corroded, rounded, stretched, damaged, or missing
•   Caliper mounting threads or fixing condition are being checked
•   Brake vibration, movement, or noise is being investigated
•   Preventative replacement is required during brake overhaul
•   The vehicle is undergoing Porsche brake system restoration.

Where it fits on the car
These bolts fit at the brake caliper mounting points on Porsche 993, 996, 997.1, Boxster, and Cayman models. Exact position can vary depending on model, axle, caliper type, and brake package.

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

99907340201

The product you are viewing cross references to these numbers

Brake caliper mounting stud kit GiroDisc
One kit per axle

Fits: - Front and Rear

Porsche 997 Carrera - 2005 to 2008 with PCCB
Porsche 996 GT3 / GT2 - 1999 to 2005 with PCCB 
Porsche 996 turbo - 2000 to 2005 with PCCB 
Porsche 987 Cayman S / R 2005 to 2008 with PCCB 
Porsche 987 Boxster S - 2005 to 2008 with PCCB
Porsche 981 Cayman S / GTS - 2013 to 2016 with PCCB  
Porsche 981 Boxster S / GTS - 2013 to 2016 with PCCB  

Front Only
Porsche 991.1 Carrera - 2012 to 2016 with PCCB 
Porsche 991.2 Carrera S /4S / GTS - 2016 to 2018 
Porsche 911 GT3 Cup 
Porsche 911 GT3 / GT2 - 2003 to 2005
Porsche 997.1 GT3 / GT2 - 2007 to 2008 WITHOUT PCCB FRONT
Porsche 997 turbo - 2007 to 2012 WITHOUT PCCB 

Girodisc caliper studs are a direct replacement for the OEM caliper bolts.

A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.

Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.

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

BCS-05

The product you are viewing cross references to these numbers

Brake caliper mounting stud kit GiroDisc
One kit per axle

Fits: - Front 340mm Disc and Rear 325mm Disc

Porsche 996 Carrera  - 1997 to 2005
Porsche 997.1 Carrera - 2005 to 2008
Porsche 986 Boxster S - 1999 to 2004
Porsche 987 Boxster S - 2005 to 2012
Porsche 987 Cayman S / R - 2005 to 2012

Rear Only - 325mm Disc
Porsche 981 Cayman / Boxster - 2012 to 2016
Porsche 981 Cayman S / Boxster S / GTS - 2012 to 2016
718 Cayman 2.0ltr / Boxster 2.0ltr - 2017 Onwards 
Porsche 718 Cayman S 2.5ltr / Boxster S 2.5ltr / GTS 2.5ltr - 2017 Onwards

Girodisc caliper studs are a direct replacement for the OEM caliper bolts.

A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.

Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.

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

BCS-06

The product you are viewing cross references to these numbers

Brake Disc Mounting Screws. M6 x 16. (for vehicles with 5mm spacers/Factory option XRP)
2 x Brake disc screws are required per disc/5mm spacer.

Brake disc retaining screw is an extended length fixing screw designed specifically for Porsche vehicles fitted with factory 5mm wheel spacers. It secures the brake disc (rotor) to the wheel hub, ensuring correct disc positioning during wheel installation and brake servicing. On vehicles equipped with factory spacers, standard-length disc screws are too short to achieve proper thread engagement. This longer version compensates for the additional spacer thickness, allowing the brake disc to seat correctly against the hub and remain accurately aligned until the wheel bolts are installed. Manufactured to Porsche factory dimensions and thread specification, this screw provides correct fitment, corrosion resistance, and reliable retention during service and assembly. It is a critical but often overlooked component when working on cars with OEM wheel spacers.

Fits:
Porsche 996
Porsche 997.1
Porsche 997.2
Porsche 991.1
Porsche 991.2
Porsche Boxster 986
Porsche Boxster 987.1
Porsche Boxster 987.2
Porsche Cayman 987C.1
Porsche Cayman 987C.2

Porsche Panamera 970

Why Replacement Matters: 
Using a standard-length brake disc screw on a spacer-equipped hub can result in insufficient thread engagement, leading to poor disc retention or stripped threads. Replacing missing or incorrect screws with the proper extended version ensures correct assembly, avoids hub damage, and maintains factory-correct brake installation.

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

90026910601

The product you are viewing cross references to these numbers

Brake Disc Mounting Screws. M6 x 16. (for vehicles with 5mm spacers/Factory option XRP)
2 x Brake disc screws are required per disc/5mm spacer.

Fits:
Porsche 996
Porsche 997

Porsche 991  
Porsche Boxster 986
Porsche Boxster 987
Porsche Cayman
Porsche Panamera 970

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

90026910601

The product you are viewing cross references to these numbers

Brake Disc Mounting Screw - M6 x 12

Sold each - 2 required per disc

Maintain secure and accurate brake disc installation with this OE Match Brake Disc Mounting Screw 90026904701. Used across a wide range of Porsche models, this small but essential fastening component secures the brake disc (rotor) to the wheel hub during assembly and servicing.

Fits:

• Porsche 911
• Porsche 924S
• Porsche 944
• Porsche 964
• Porsche 993
• Porsche 996
• Porsche 997
• Porsche Boxster 986
• Porsche Boxster 987
• Porsche Cayman

Although the wheel bolts ultimately clamp the brake disc firmly against the hub, the brake disc mounting screw plays an important role in keeping the disc correctly aligned during installation. This ensures accurate positioning of the brake rotor, simplifies wheel and brake servicing and helps prevent movement while the wheel is removed.

Due to repeated exposure to heat, corrosion, moisture and brake servicing, these screws can become seized, damaged or stripped over time. Replacing the mounting screw whenever the brake discs are renewed helps ensure trouble-free future maintenance and correct brake assembly.

What Does a Brake Disc Mounting Screw Do?

The brake disc mounting screw secures the brake disc to the wheel hub before the wheel is fitted.

Its primary functions include:

• Locating the brake disc correctly on the hub
• Maintaining disc alignment during assembly
• Preventing disc movement when the wheel is removed
• Simplifying brake servicing
• Supporting accurate brake disc installation
• Assisting wheel and hub assembly procedures
• Helping maintain factory brake fitment standards

Although small, this component plays an important role in brake system maintenance and assembly.

Why Do Brake Disc Mounting Screws Fail?

Brake mounting screws operate in a harsh environment and are frequently removed during brake servicing.

Common causes of failure include:

• Corrosion and rust
• Heat cycling from braking systems
• Rounded or stripped screw heads
• Seized threads
• Improper removal techniques
• Galvanic corrosion between metals
• Age-related deterioration
• Repeated brake servicing

It is common for original screws to become difficult to remove after years of service.

When Should Brake Disc Mounting Screws Be Replaced?

Brake disc mounting screws should always be inspected during brake maintenance.

Replacement is recommended when:

• Installing new brake discs
• Screw heads become damaged
• Threads show signs of wear
• Corrosion is present
• Screws become seized during removal
• Carrying out brake refurbishment work
• Restoring older Porsche models
• Performing preventative maintenance

Many Porsche specialists routinely replace retaining screws during brake disc replacement to avoid future servicing issues.

Why Replacement Matters

Replacing worn or corroded brake disc mounting screws helps ensure correct brake assembly and easier future maintenance.

Benefits include:

• Secure brake disc location
• Easier brake servicing
• Reduced risk of seized hardware
• Improved assembly accuracy
• Better long-term reliability
• Prevention of damaged hub threads
• Restoration of factory fitment standards
• Professional-quality brake maintenance

A new retaining screw is an inexpensive but worthwhile addition to any brake overhaul.

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

90026904701

The product you are viewing cross references to these numbers