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Porsche // 911 & 912 (1965-1989) // Any
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- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
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
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 1965-73
Material: Metal
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90151101024GRV
The product you are viewing cross references to these numbers
PLEASE NOTE:
Due to its size, weight or fragility, this item requires additional protective packaging to make sure it reaches you undamaged. A small packing surcharge is applied to cover these specialist materials and the extra care taken preparing your order for transit.
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 1974-89
Porsche 930 Turbo 3.0L / 3.3L 1975-89
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91151105103
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
OE Match replacement upper latch assembly that secures the front bonnet (hood) on early Porsche 911 models (1965–1973). This latch engages with the bonnet striker to hold the hood firmly closed and works in conjunction with the lower latch and release cable to provide safe, reliable operation.
Fits:
Porsche 911 1965 - 1973
Diagram ref no 10
The upper latch serves as a secondary locking point for the front bonnet, helping keep it tightly sealed against wind, vibration, and road forces while driving. Its geometry and pivot action are designed to work seamlessly with the factory release mechanism, striker pin, and lower catch system for smooth opening and secure closure.
This OE Match version is ideal for classic restoration projects, rebuilds, or whenever the original latch has worn, bent, corroded, or no longer provides positive engagement.
The upper latch engages the bonnet’s striker when the hood is closed, providing a secure secondary lock that prevents the bonnet from lifting or rattling while driving. It also supports proper hood alignment and seals the front bodywork for aerodynamic smoothness and weather protection.
Function: Installed at the upper front mounting location of the bonnet closure system, this latch acts as part of a two-point capture system that holds the front hood closed. It retains the striker securely and releases smoothly when the interior release cable is actuated. Proper latch function ensures:
• Secure hood retention while driving
• Smooth, predictable operation of the release mechanism
• Even hood alignment and gap control
• Reduced vibration and wind noise
The bonnet latch is a critical safety and structural component of the front body closure system. A worn, bent, or corroded latch can result in poor hood engagement, hood movement or rattle, misalignment of gaps, or - in worst cases - unintentional bonnet opening at speed. Replacing an aged or compromised latch with an OE Match unit helps ensure secure closure, factory-correct alignment, and dependable release performance.
When to replace:
• Hood does not close or lock securely
• Clamshell alignment issues or uneven gaps
• Hood rattles or lifts under wind load
• Latch shows signs of wear, corrosion, or binding
• During restoration, body panel work, or release cable service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90151105121
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Fits:
Porsche 911 1974-89
Porsche 930 3.0L / 3.3L 1975-89
Porsche 964 C2 / C4 1989-91
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91151105201
The product you are viewing cross references to these numbers