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Air Injection Pump / Air Injectors
By OE Match
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII Turbo 2010-13
This OE Match secondary air pump is an emissions control component designed for Porsche 911 (997) Turbo models with the 3.6L engine. The pump forms part of the secondary air injection system, which introduces fresh air into the exhaust system during cold engine start-up to help reduce emissions.
Fits:
Porsche 997.1 Turbo 3.6L 2007 - 2009 (9770)
Porsche 997.2 Turbo 3.6L 2010 - 2012 (9770)
Diagram ref no 1
The secondary air pump is part of the air injection system used in many high-performance Porsche engines to control emissions during cold start conditions. When the engine is first started, the pump forces fresh air into the exhaust manifolds, allowing unburned fuel in the exhaust gases to oxidise and burn more completely.
This process allows the catalytic converters to reach their optimal operating temperature more quickly, reducing hydrocarbon emissions and helping the vehicle meet emissions regulations.
The OE Match pump is designed to match the original Porsche component in airflow capacity, electrical connections and mounting configuration, providing a reliable replacement during emissions system repair.
During cold engine start-up, the pump injects fresh air into the exhaust system. The additional oxygen promotes the combustion of residual fuel vapours in the exhaust gases, allowing the catalytic converters to heat up rapidly and operate efficiently.
Once the engine reaches normal operating temperature, the secondary air injection system typically switches off.
Function
• Secondary Air Injection: Delivers fresh air into the exhaust system during cold start
• Emission Reduction: Helps burn unburned hydrocarbons in exhaust gases
• Catalytic Converter Warm-Up: Speeds catalyst heating for improved efficiency
• ECU Integration: Operates as part of the vehicle’s emissions management system
Secondary air pumps operate during every cold start and are exposed to heat, moisture and vibration. Over time the internal motor or pump mechanism can fail, which may trigger a check engine light and increase emissions output. Replacing a faulty pump restores proper air injection and ensures the vehicle’s emissions system functions correctly.
When to Replace. Consider replacing the secondary air pump if you notice:
• Check engine light related to secondary air injection faults
• Increased cold-start emissions
• Unusual noise from the pump during startup
• Failure during emissions testing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760520400
The product you are viewing cross references to these numbers
OEMatch Air Injection Pump / Air Injectors — Fit, Function, Confidence
OEMatch Air Injection Pump / Air Injectors provide replacements and related items for Porsche models. OEMatch focuses on air injection pumps and injectors selected for Porsche applications. These parts support emissions control at cold start and help the catalytic converter reach operating temperature more quickly, improving idle stability until normal running temperature is achieved.
Available Types
- Air injection pumps
- Air injectors
- Associated hoses, check valves and mounting hardware
Understanding OEMatch Air Injection Pump / Air Injectors
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original air injection pumps and injectors.
OE (Original Equipment) refers to parts matching original specifications for the air injection pumps and injectors and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM air injection pumps and injectors engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The secondary air injection system uses a pump and injectors to introduce fresh air into the exhaust stream during cold starts. This added air accelerates catalytic converter warm-up, encourages combustion of unburnt fuel, reduces hydrocarbon emissions and helps maintain a smooth idle while the engine reaches normal operating temperature.
Benefits Include
- Improved cold-start combustion and smoother idle
- More reliable emissions control during warm-up
- Reduced risk of catalytic converter overheating or contamination
Why Air Injection Pump / Air Injectors Wear and Fail
- Moisture ingress and internal corrosion of pump components
- Carbon and deposit build-up that blocks injector ports or valves
- Cracked or leaking hoses, valves or seals reducing airflow
- Electrical faults, relays or control issues affecting pump operation
The Importance of Replacing with OEMatch Air Injection Pump / Air Injectors
Replacing worn or faulty air injection pumps and injectors restores proper exhaust air delivery during cold start, helping the catalytic converter reach operating temperature promptly and reducing emissions. Timely replacement can improve drivability at idle, prevent downstream exhaust damage and support regulatory compliance for Porsche vehicles where emissions testing applies.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances
- Components selected for compatibility with factory mounting points and clearances
- Options for pump, injector and associated hose or valve replacement without replacing unrelated assemblies
