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Air pump Genuine Porsche part 99660510401
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
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 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

In fuel injected engines, the throttle body is the part of the air intake system that controls the amount of air flowing into the engine, in response to driver accelerator pedal input in the main. The throttle body is usually located between the air filter box and the intake manifold, and it is usually attached to, or near, the mass airflow sensor.
The largest piece inside the throttle body is the throttle plate, which is a butterfly valve that regulates the airflow. Have a larger diameter throttle body produces more air flow with equals more power. The upgrades should be used in conjunction with the competition plenums.
This is a 74mm Throttle body.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760511502
The product you are viewing cross references to these numbers
- 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 Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- 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
In fuel injected engines, the throttle body is the part of the air intake system that controls the amount of air flowing into the engine, in response to driver accelerator pedal input in the main. The throttle body is usually located between the air filter box and the intake manifold, and it is usually attached to, or near, the mass airflow sensor.
The largest piece inside the throttle body is the throttle plate, which is a butterfly valve that regulates the airflow. Have a larger diameter throttle body produces more air flow with equals more power. The upgrades should be used in conjunction with the competition plenums.
This is a 74mm Throttle body.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760511502
The product you are viewing cross references to these numbers
- 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 Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- 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

Fits:
Porsche 996 Carrera 3.4L / 3.6L (cars with Electronic accelerator)
Porsche 987.1 Boxster 2.7L / S 3.2L/3.4L 2007-08
Porsche 987.2 Boxster 2.9L / S 3.4L 2009-12
Porsche 981 Boxster / Boxster Spyder 2012-16
Porsche 987C.1 Cayman 2.7L / S 3.4L 2006-08
Porsche 987C.2 Cayman 2.9L / S 3.4L 2009-12
Porsche 981C Cayman / Cayman GT4 2014-16
Porsche 997.1 Carrera 3.6L / Carrera S 3.8L 2005-08
Porsche 997.1 Turbo/GT2 3.6L 2007-11
Porsche 997.2 Turbo / Turbo S 3.8L 2010-13
Porsche 991.1 Turbo 3.8L 2014-16
Porsche 955 Cayenne 3.2L 2004-05
Porsche 957 Cayenne 3.6L 2008-10
Porsche 958 Cayenne 3.6L 2012-18
Porsche 95B Macan S 3.0L / Turbo 3.6L 2014-18
Porsche 970 Panamera 3.6L 2010-16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760511502
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- 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
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
Porsche 996 C2 / C4 / C4S 2000>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660512400
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
This OE Match secondary air injection pump (SIR pump) is an emissions control component designed for Porsche 986 Boxster and Porsche 911 (996) models. It forms part of the secondary air injection system, which pumps fresh air into the exhaust system during cold engine start-up to help reduce emissions.
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 injection pump, often referred to as a SIR pump or air injection pump, is a key component in the engine emissions system. It operates primarily during cold starts, forcing fresh air into the exhaust manifold. This additional oxygen helps burn remaining fuel vapours in the exhaust gases before they pass through the catalytic converters.
The OE Match secondary air injection pump follows the original Porsche design specifications for airflow capacity, electrical connections and mounting points. This ensures the pump works correctly with the vehicle’s engine control unit (ECU) and secondary air valves.
When the engine is started cold, the pump injects fresh air into the exhaust system. The extra oxygen promotes more complete combustion of residual hydrocarbons in the exhaust stream and allows the catalytic converters to heat up faster.
This process significantly reduces cold-start emissions and helps the vehicle meet environmental regulations.
Function
• Secondary Air Injection: Pumps fresh air into the exhaust system during cold start
• Emission Reduction: Helps burn unburned hydrocarbons in exhaust gases
• Catalytic Converter Warm-Up: Accelerates catalyst operating temperature
• Engine Management Integration: Works with ECU and secondary air valves
Secondary air pumps operate during every cold start and are exposed to moisture, temperature changes and exhaust gases. Over time the internal motor or pump mechanism may fail, which can trigger a check engine light and increase emissions output. Replacing a faulty pump restores proper operation of the emissions system and ensures efficient engine performance.
When to Replace. Consider replacing the secondary air pump if you notice:
• Check engine light related to secondary air injection faults
• Unusual whining or whistling noise during cold start
• Rough idle during cold start
• Vehicle fails emissions testing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660510404
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 996 Carrera 3.4L / 3.6L (cars with Electronic accelerator)
Porsche 987.1 Boxster 2.7L / S 3.2L/3.4L 2007-08
Porsche 987.2 Boxster 2.9L / S 3.4L 2009-12
Porsche 981 Boxster / Boxster Spyder 2012-16
Porsche 987C.1 Cayman 2.7L / S 3.4L 2006-08
Porsche 987C.2 Cayman 2.9L / S 3.4L 2009-12
Porsche 981C Cayman / Cayman GT4 2014-16
Porsche 997.1 Carrera 3.6L / Carrera S 3.8L 2005-08
Porsche 997.1 Turbo/GT2 3.6L 2007-11
Porsche 997.2 Turbo / Turbo S 3.8L 2010-13
Porsche 991.1 Turbo 3.8L 2014-16
Porsche 955 Cayenne 3.2L 2004-05
Porsche 957 Cayenne 3.6L 2008-10
Porsche 958 Cayenne 3.6L 2012-18
Porsche 95B Macan S 3.0L / Turbo 3.6L 2014-18
Porsche 970 Panamera 3.6L 2010-16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760511502
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- 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
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18

Fits:
Porsche 996 Carrera 3.4L / 3.6L (cars with Electronic accelerator)
Porsche 987.1 Boxster 2.7L / S 3.2L/3.4L 2007-08
Porsche 987.2 Boxster 2.9L / S 3.4L 2009-12
Porsche 981 Boxster / Boxster Spyder 2012-16
Porsche 987C.1 Cayman 2.7L / S 3.4L 2006-08
Porsche 987C.2 Cayman 2.9L / S 3.4L 2009-12
Porsche 981C Cayman / Cayman GT4 2014-16
Porsche 997.1 Carrera 3.6L / Carrera S 3.8L 2005-08
Porsche 997.1 Turbo/GT2 3.6L 2007-11
Porsche 997.2 Turbo / Turbo S 3.8L 2010-13
Porsche 991.1 Turbo 3.8L 2014-16
Porsche 955 Cayenne 3.2L 2004-05
Porsche 957 Cayenne 3.6L 2008-10
Porsche 958 Cayenne 3.6L 2012-18
Porsche 95B Macan S 3.0L / Turbo 3.6L 2014-18
Porsche 970 Panamera 3.6L 2010-16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760511502
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- 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
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Ensure your Porsche’s emissions system performs flawlessly with this OE Match secondary air injection solenoid valve (99660515500). Engineered to replicate the original Porsche design, this valve controls the vacuum signal that activates the secondary air injection system, allowing fresh air to enter the exhaust stream during cold starts, reducing emissions and supporting cleaner combustion.
The valve provides consistent vacuum control and quick response, restoring the proper function of the secondary air system and preventing check-engine light faults (often P0410/P0411)
Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 Mk2 - 2004 to 2005
Porsche 955 Cayenne turbo - 2003 to 2006
Porsche 957 Cayenne turbo - 2007 to 2010
Porsche 958 Cayenne turbo V8 - 2010 to 2017
Porsche 970 Panamera turbo V8 - 2009 to 2016
Diagram ref no 44
Function:
This valve regulates vacuum flow to the secondary air injection pump and combination valves, enabling the system to inject fresh air into the exhaust manifold during engine warm-up. This helps burn uncombusted hydrocarbons, reducing emissions and ensuring smooth cold starts.
Why & When Replacement Matters
Why:
A failing solenoid valve can cause improper secondary air operation, resulting in rough cold starts, increased emissions, or illuminated check-engine lights.
When:
- If diagnostic codes P0410/P0411 (secondary air system malfunction) appear
- When air pump or combination valves are replaced
- During emissions or intake system service on high-mileage engines
Replacing with an OE Match solenoid valve restores proper air injection control, improves cold-start behaviour, and ensures compliance with emissions standards.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660515500
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 Executive 2014-16
- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
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