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Air filter. Porsche 911 1972-83 ❭ 91111018503
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
OE Match air filter for Porsche 911 models from 1972 to 1983. This replacement engine air filter helps protect the intake system by filtering dust, dirt, and debris before air enters the engine.
Fits:
Porsche 911 2.4L
Porsche 911 2.7L
Porsche 911 3.0L
Porsche 911 SC 1974 - 1983
This part replaces or supersedes earlier Porsche numbers: 91111018500, 91111018501, 91111018502, 91111018502001
The air filter cleans incoming air before it reaches the engine intake system. A clean, correctly fitted filter helps support smooth running, efficient combustion, throttle response, and long-term engine reliability.
Functions
• Replaces the engine air filter
• Filters dust, dirt, and debris from intake air
• Helps protect internal engine components
• Supports correct airflow to the intake system
• Helps maintain smooth running and performance
• Suitable for routine service and preventative maintenance
• OE Match replacement for Porsche 911 intake service.
Why Replace This Part?
Air filters become dirty and restricted over time as they collect dust, road dirt, and airborne debris. A blocked or worn filter can reduce airflow, affect performance, increase fuel consumption, and allow contamination into the intake system if damaged. Replacing the air filter regularly helps keep the engine breathing clean air.
When to Replace This Part
• Routine service interval is due
• The air filter is dirty, clogged, damaged, or oil-contaminated
• Engine performance or throttle response feels reduced
• Fuel economy has worsened
• Intake system service is being carried out
• The airbox has been opened for inspection
• The vehicle is undergoing Porsche 911 maintenance or restoration.
Where it fits on the car
This air filter fits inside the engine air filter housing / airbox on Porsche 911 models from 1972 to 1983. It forms part of the engine intake system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111018503
The product you are viewing cross references to these numbers

K&N Recharger Kit 99-5000EU is designed for cleaning your K&N oiled cotton air filter when it is time to be serviced.
Part 99-5000EU is labeled in English, Spanish, Swedish, Polish and Czech for use in Europe.
The kit comes with K&N Power Kleen air filter cleaner and air filter oil.
99-5000EU will restore air flow efficiency and will bring your K&N oiled cotton air filter to like new condition. K&N Power Kleen works to dissolve the dirt build up and old filter oil, and can be washed away with water. After the air filter fully dries re-oil your air filter then reinstall it.
This Recharger Kit comes with a 204 milliliter aerosol spray can of oil and a 355 milliliter K&N pump bottle of Power Kleen air filter cleaner.
NOTE: This product has got shipping restrictions for export
Please note this item can not be sent out by plane. Deliveries only to European countries by road service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99-5000EU
The product you are viewing cross references to these numbers
Includes special BMC detergent and an oil applicator - in either spray bottle or liquid form.

HOW IS A BMC FILTER REGENERATED?
We recommend using original BMC kits only, as other products may not be effective or may damage the filter permanently, thus invalidating the warranty.
We recommend regenerating the filter (washing + oil application) every 20.000 – 25.000 km to ensure best performance and long service life.
This value is a rough estimate and can vary based on the climatic conditions and the ground on which the vehicle is used (sand, dirt roads, etc.).
The various steps to be carried out in order to regenerate the filtering element are indicated in the instructions contained in the regeneration kit.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
WA2
The product you are viewing cross references to these numbers
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