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PorscheChassis / BodyworkBonnets / Locks & Latches

Lower Bonnet Lock, Front. Porsche 997.2 911 / 987.2 Boxster / 987.1 Cayman / 987.2 Cayman › 99751105301

Lower Bonnet Lock, Front. Porsche 997.2 911 / 987.2 Boxster / 987.1 Cayman / 987.2 Cayman - 99751105301
3
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99751105301
Product Information
Product Information

Genuine Porsche lower bonnet lock for the 997.2 911, 987.2 Boxster and both 987.1 and 987.2 Cayman. Identified as 'Lock lower part' in the supplied exploded diagrams, it is the body-mounted component of the front bonnet locking mechanism.

Fits

  • Porsche 997.2 Carrera C2 3.6L 2009–12
  • Porsche 997.2 Carrera C4 3.6L 2009–12
  • Porsche 997.2 Carrera C2S 3.8L 2009–12
  • Porsche 997.2 Carrera C4S 3.8L 2009–12
  • Porsche 997.2 Turbo 2010–13
  • Porsche 997.2 GT2 RS 2011–13
  • Porsche 987.1 Cayman 2.7L 2006–08
  • Porsche 987.1 Cayman S 3.4L 2005–08
  • Porsche 987.2 Boxster 2.9L 2009–12
  • Porsche 987.2 Boxster S 3.4L 2009–12
  • Porsche 987.2 Cayman 2.9L and Cayman S / R 3.4L 2009–12

Confirm the vehicle's model, production year and engine specification before ordering.

What This Product Does

This lower mechanism engages the bonnet's upper locking component as the lid closes. Its mounting on the body provides the fixed catch needed for bonnet retention and normal release operation. Correct engagement depends on the condition and alignment of both locking components.

Functions

  • Receives the matching upper bonnet lock.
  • Holds the bonnet shut through mechanical engagement.
  • Forms part of the bonnet closure and release system.

Technical Details

  • Porsche genuine component, reference 99751105301.
  • Location: Front; lower portion of the bonnet lock.
  • Each supplied assembly diagram specifies one lower lock.
  • 997.2 diagram coverage: Carrera 2009–12 and Turbo / GT2 RS 2010–13.
  • 987 diagram coverage: 987C.1 Cayman 2006–08, 987.2 Boxster / Boxster S 2009–12 and 987C.2 Cayman 2009–12.
  • The upper lock, micro switch and mounting hardware have separate entries in the diagrams.

Symptoms of Fault

  • Inconsistent engagement when closing the bonnet.
  • Sticking or irregular operation during release.
  • A closed bonnet that moves or rattles.
  • Visible corrosion, wear or damage around the catch.
  • Poor engagement after damage to the lock or surrounding bodywork.

Why Replacement Matters

A damaged or deteriorated lower mechanism can prevent the upper and lower components from engaging correctly. Replacement addresses a confirmed lock fault and may be necessary during front-end body repairs. Check the upper catch, release components, micro switch and fasteners at the same time; alignment or cable faults should not be mistaken for failure of the lower lock.

FAQs

Which bonnet does this lock serve?
It is intended for the front bonnet, not a rear lid.

Is this a complete locking kit?
The identified product is the lower lock. Separate diagram entries cover the upper mechanism, micro switch and associated hardware; do not assume these are included.

How can I check suitability?
Use reference 99751105301 alongside the detailed applications above, and verify the vehicle identification number where necessary.



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

99751105301
99751105301

The product you are viewing cross references to these numbers
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Product Information
Product Information

Small Rubber Bonnet/Boot Hooks (Set of 2) 

Complete your Porsche project with the authentic finishing touch using these Small Rubber Bonnet/Boot Hooks (Set of 2. Inspired by the simple and purposeful fastening systems used on classic Porsche competition cars, these high-quality rubber hooks provide secure bonnet or engine lid retention while adding an unmistakable motorsport-inspired appearance.

It's often the smallest details that define the quality of a build. Whether you're creating a backdate, replica, restomod or tribute car, these small rubber hooks help capture the clean, functional look of the legendary RSR while offering a lightweight and dependable fastening solution.

Manufactured from durable, high-quality rubber with robust mounting eyelets, these hooks are designed to withstand repeated use while maintaining excellent flexibility and holding strength. By reducing unnecessary complexity and weight, they reflect the same engineering philosophy that made Porsche's factory competition cars so effective.

Perfect for enthusiasts who appreciate authentic styling and attention to detail, these engine lid hooks provide the finishing touch that demonstrates every aspect of the build has been carefully considered.

What Do Rubber Bonnet/Boot Hooks Do?

Rubber bonnet and boot hooks provide a simple, secure method of retaining body panels while delivering an unmistakable motorsport-inspired appearance.

Their primary functions include:

  • Securing the bonnet or engine lid.
  • Helping prevent unwanted panel movement.
  • Providing a lightweight fastening solution.
  • Supporting simplified body panel retention.
  • Enhancing competition-inspired styling.
  • Complementing restoration and custom builds.

They remain a popular choice for classic Porsche projects where reliability, simplicity and reduced weight are key objectives.

Why Upgrade to Rubber Engine Lid Hooks?

Rubber engine lid hooks are chosen for both their practical advantages and iconic appearance.

Common reasons for fitting them include:

  • Completing an RSR-inspired build.
  • Finishing a backdate or tribute project.
  • Reducing weight compared with conventional latch systems.
  • Simplifying bonnet or engine lid fastening.
  • Replacing worn or damaged rubber straps.
  • Adding an authentic motorsport detail.
  • Enhancing the overall appearance of the vehicle.

These subtle upgrades deliver a purposeful finish that reflects Porsche's rich motorsport heritage.

Benefits

  • Adds authentic competition-inspired styling.
  • Lightweight alternative to conventional fastening systems.
  • Secure bonnet or engine lid retention.
  • Durable construction for long service life.
  • Straightforward installation.
  • Completes the appearance of backdate and restomod builds.
  • Demonstrates exceptional attention to detail.
  • Excellent value OE Match restoration component.

Installation Recommendations

For the best results, inspect or renew associated mounting hardware during installation, including:

  • Mounting brackets.
  • Retaining pins.
  • Fasteners and fixings.
  • Reinforcement plates where required.
  • Bonnet or engine lid alignment.
  • Body panel mounting points.

Correct positioning and adjustment will ensure secure fastening, consistent tension and a professional-quality finish.