How should the air filter and PCV filter be replaced and maintained on Mazda 626?

The air filter and PCV filter are to be changed by new ones at certain time intervals and a comprehensive preventative maintenance program would require the two filters to be checked in between. The air filter is found in the air cleaner housing on the engine top, and is changed by unscrewing the wing nut on the top of the air cleaner housing, unclips the clips and the top plate is raised off. The top plate should not be replaced when it is off but caution must be taken not to drop anything in the carburetor. The air filter element may be then removed out of the housing and the interior of the air cleaner housing wiped out with a clean rag. The air cleaner housing should be put back then the new filter should be inserted as making sure that it fits well at the bottom. The PCV filter is housed as well in the air cleaner located inside the air cleaner housing; once the top plate and air filter are removed, the PCV filter is found on the side of the housing. One can pry the filter up with a screwdriver and then remove it out of the housing. Lastly, a new PVC filter and air filter are added and the top plate fitted making sure the arrow is in the same line with the arrow of the air intake.

Genuine Mazda 626 Air Filter

Air Cleaner

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Mazda 626 Air Filter Part Number: FSD7-13-Z40
$15.70 MSRP: $20.94
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Product Specifications
- Other Name: Element, Air Cleaner; Air Filter
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 1998-2002 Mazda 626 | DX, ES, LX | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mazda 626 Air Filter Part Number: RF03-23-603
$20.38 MSRP: $27.17
You Save: $6.79 (25%)
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Product Specifications
- Other Name: Element, Air Filter
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 1984-1985 Mazda 626 | LX | 4 Cyl 2.0 L DIESEL
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Mazda 626 Element Part Number: FS11-13-Z40
$13.46 MSRP: $17.95
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Product Specifications
- Other Name: Element, Air Filter; Element, Filter Element
- Replaces: FS11-13-Z40-9A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 1993-1997 Mazda 626 | DX, ES, LX | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mazda 626 Air Filter Part Number: F801-23-603-9U
$2.90 MSRP: $3.80
You Save: $0.90 (24%)
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Product Specifications
- Other Name: Element, Air Filter
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 1984-1985 Mazda 626 | DX, LX | 4 Cyl 2.0 L GAS
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Mazda 626 Element Part Number: AS01-13-Z40-9U
Product Specifications
- Other Name: Element, Air Filter; Air Filter
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 1988-1992 Mazda 626 | DX, GT, LE, LX, Turbo, Turbo 4WS | 4 Cyl 2.2 L GAS

Mazda 626 Air Filter

The Mazda 626 Air Filter helps to protect the engine from dirt and debris and allows the car to breathe clean air, ensuring smooth power and fuel economy. Since the engine consumes about 10,000 gallons of air with each gallon of gasoline, this Air Filter has to collect particles as small as five microns to ensure that they do not scratch the cylinder walls or sensors. Over the years Mazda has applied two key styles in this model line. The older carbureted versions applied a round Air Filter element that was located at the top of the carburetor within a metal housing, and all it took to access was a simple wing nut. Subsequent fuel-injected models applied a flat panel Air Filter that was mounted in a remote air box and was connected to the throttle body via a duct, which made the airflow easier to manage and yet trapped the contaminants. The Mazda factory Air Filters are all based on pleated paper media, which is the cheap way to balance filtration and airflow, although the shape of the structure varies to suit the various intake designs. Either way, frequent replacement prevents the surface from becoming congested to the extent that it suffocates airflow, a factor that may rob acceleration and increase fuel consumption. Replacing the filter will also allow you to remove all the leaves and sand that have crept into the housing and ensure that the inlet duct is free of cracks that would allow unfiltered air to enter. Mazda manages to ensure that each 626 engine is safe and efficient by integrating careful maintenance with intelligent factory design.

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Mazda 626 Air Filter Parts and Q&A

Element
AS01-13-Z40-9U
Q: How should the air filter and PCV filter be replaced and maintained on Mazda 626?
A:
The air filter and PCV filter are to be changed by new ones at certain time intervals and a comprehensive preventative maintenance program would require the two filters to be checked in between. The air filter is found in the air cleaner housing on the engine top, and is changed by unscrewing the wing nut on the top of the air cleaner housing, unclips the clips and the top plate is raised off. The top plate should not be replaced when it is off but caution must be taken not to drop anything in the carburetor. The air filter element may be then removed out of the housing and the interior of the air cleaner housing wiped out with a clean rag. The air cleaner housing should be put back then the new filter should be inserted as making sure that it fits well at the bottom. The PCV filter is housed as well in the air cleaner located inside the air cleaner housing; once the top plate and air filter are removed, the PCV filter is found on the side of the housing. One can pry the filter up with a screwdriver and then remove it out of the housing. Lastly, a new PVC filter and air filter are added and the top plate fitted making sure the arrow is in the same line with the arrow of the air intake.