This category covers engine air filters, cabin air filters, oil filters, fuel filters, transmission filters and the housings and caps that hold them.
Oil and air filters are listed by both the manufacturer part number and the thread or cartridge dimensions where relevant, because two filters that fit the same housing can differ in bypass valve setting and media area. Using the correct specification matters more on turbocharged and direct-injection engines than on older port-injected designs.
Cabin filters are split into particulate and activated-carbon types. The carbon version costs more and reduces odour as well as dust, which is worth knowing if the vehicle spends time in traffic.
Fuel filters on diesel applications often include a water separator and a drain; check the listing for whether the separator is integrated or separate.
