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- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
This Porsche Genuine OE Secondary Air Pump is an original factory emissions-control component designed for Porsche 986 Boxster and Porsche 911 (996) models. This pump is part of the Secondary Air Injection (SAI) system, which works with the engine management and catalytic converters to reduce exhaust emissions during cold engine start-up.
Fits:
Porsche 986 Boxster / Boxster S 2000 - 2004
Porsche 996 C2 / C4 / C4S 2000 - 2005
Porsche 996 Turbo 2001 - 2005
Diagram ref no 1
This part supersedes earlier Porsche part numbers: 99660510400, 99660510401.
The secondary air pump injects fresh air into the exhaust system immediately after a cold start. The additional oxygen helps burn unburned hydrocarbons in the exhaust gases, allowing the catalytic converters to reach their operating temperature more quickly and significantly reducing harmful emissions.
The pump operates automatically under control of the engine control unit (ECU) and works together with air valves and sensors to maintain efficient emissions performance.
Functions & Technical Role
• Secondary air injection: Pumps fresh air into the exhaust stream during cold start
• Emission reduction: Helps oxidize unburned fuel in exhaust gases
• Catalytic converter warm-up: Improves catalyst efficiency during engine warm-up
• ECU-controlled operation: Integrates with engine management and emission sensors
• OE reliability: Manufactured to Porsche specifications for correct airflow and durability
Fitment / Position on Car
• Fitting position: Engine compartment / emissions system
• Location: Installed within the secondary air injection system, connected to the exhaust air passages
• System: Exhaust emissions control system
Secondary air pumps operate during every cold start and are exposed to heat, moisture, and frequent operation cycles. Over time, internal components may wear or fail, which can cause:
• Check engine light related to the secondary air system
• Increased cold-start emissions
• Rough idle or unusual pump noise
• Failure during emissions testing
Replacing a faulty pump with a genuine Porsche OE unit restores proper emissions system performance and ensures the vehicle meets factory operating standards.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660510404
The product you are viewing cross references to these numbers
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Clamp 25/15 – Electric Air Valve & Wiring Loom Clamp
High-quality 25/15 clamp designed for Porsche 928 models and 997.2 models equipped with the X51 engine upgrade kit.
This clamp is used for mounting the electric air valve on the Porsche 928 and securing the engine wiring loom on the Porsche 997.2 X51, ensuring stable positioning and correct routing of critical components within the engine bay.
Fits:
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Diagram ref no 37B
Manufactured to OEM specifications, this clamp offers precise fitment, durability, and resistance to heat and vibration. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche intake and electrical systems.
Key Features
• Clamp size 25/15
• Suitable for Porsche 928 and Porsche 997.2 (X51 engine upgrade)
• Part number 99951112401
• Used for electric air valve mounting and wiring loom securing
• Ensures stable mounting and correct routing
• Prevents vibration-related movement and wear
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually
Function and Purpose
This clamp is designed to secure components across different systems.
It helps to:
• Mount the electric air valve securely (928)
• Maintain correct routing of engine wiring looms (997.2 X51)
• Prevent vibration-related wear or movement
• Protect sensitive electrical and intake components
• Ensure long-term system reliability
Why Replace Clamps
Clamps can degrade over time due to heat and environmental exposure.
Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Component movement or misalignment
• Increased risk of wear or system faults
Replacing worn clamps ensures secure installation and protects critical systems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951112401
The product you are viewing cross references to these numbers
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Clamp 25/15 – Electric Air Valve & Wiring Loom Clamp
High-quality 25/15 clamp designed for Porsche 928 models and 997.2 models equipped with the X51 engine upgrade kit.
This clamp is used for mounting the electric air valve on the Porsche 928 and securing the engine wiring loom on the Porsche 997.2 X51, ensuring stable positioning and correct routing of critical components within the engine bay.
Fits:
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Diagram ref no 37B
Manufactured to OEM specifications, this clamp offers precise fitment, durability, and resistance to heat and vibration. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche intake and electrical systems.
Key Features
• Clamp size 25/15
• Suitable for Porsche 928 and Porsche 997.2 (X51 engine upgrade)
• Part number 99951112401
• Used for electric air valve mounting and wiring loom securing
• Ensures stable mounting and correct routing
• Prevents vibration-related movement and wear
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually
Function and Purpose
This clamp is designed to secure components across different systems.
It helps to:
• Mount the electric air valve securely (928)
• Maintain correct routing of engine wiring looms (997.2 X51)
• Prevent vibration-related wear or movement
• Protect sensitive electrical and intake components
• Ensure long-term system reliability
Why Replace Clamps
Clamps can degrade over time due to heat and environmental exposure.
Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Component movement or misalignment
• Increased risk of wear or system faults
Replacing worn clamps ensures secure installation and protects critical systems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951112401
The product you are viewing cross references to these numbers