Tools Required:

• Pick Tool
• 10MM Wrench
• Flathead Screwdriver
• T-25 Screwdriver

To avoid damaging the mass airflow sensor, disconnect the negative terminal on the battery.

Remove the two 10MM air box screws using a ratchet.

Unlatch the air intake snorkel by using a flathead screwdriver to separate the two retention tabs (white circles).

Unplug the mass airflow sensor by using a flathead screwdriver to lift up on the retention tab and pulling the harness back.

Loosen the band clamp that holds the air intake hose to the air box, with a flathead screwdriver.

With everything loosened, the air box can now be removed from the engine bay.

Remove the six screws holding the air box assembly together.

There are six screws holding the air box together. If you're missing any, be sure to replace them.

Part No. 13717545438

With the retention screws removed, you can simply pull both halves of the air box apart.

Remove the old air filter by simply pulling it out of the air box.

Before installing a new air filter, you must clean the entire assembly with a microfiber towel. Not cleaning the air box out will contaminate the new air filter.

We're upgrading this E92 with a high-flow, performance engine air filter instead of installing the OEM paper one. This new high-flow filter should improve throttle response, as well as add a few horsepower with a tune.

Install the new air filter into the air box ensuring the gasket lines up perfectly.

With the new air filter installed, re-join the two air filter halves back together ensuring the screw holes line up.

Re-install the six screws that secure the air box together. Hand-tighten all screws into place and go in a star pattern, this will help seat the air filter properly.

Anytime you replace the air filter, it's recommended to clean the mass air flow sensor with a safe MAF cleaner. Spray 3-5 short bursts on the recepticle (white arrow).

Re-install the air box, air intake hose, snorkel and mass air flow sensor in the vice versa of removal.

It's now safe to reconnect the negative terminal on the battery.

To ensure there are no issues with the new air filter and no vacuum leaks are present, test start the vehicle.

Good job replacing your engine air filter! Be sure to replace it every 12,000 to 15,000 miles or after one year, whichever comes first.