Lexus IS: How to Replace Air Filter
A step-by-step walk through to replacing the air filter on a post-2004 Lexus IS.
This article applies to the Lexus IS 250, IS 350 (2005-2014).
The air filter stops the engine from sucking in physical pollutants like dust or leaves, which are abrasive to the engine’s metal parts. When the filter is dirty, air doesn't flow as freely resulting in less power and a rough idle. Experts advise that the filter be examined at around 6,000 miles. Replacing it depends on it's condition, but the recommended interval is after your Lexus IS has clocked 10,000 miles. You can replace a Lexus IS air filter at home or at a garage. When you do it yourself, you only incur the cost of a Lexus IS filter which goes for $7 to $70, but having a garage replace it may cost you an extra $50 or so. This article explains how to replace the air filter at home with moderate mechanical skills and thus avoid garage costs.
Materials and Tools Needed
- 10mm socket
- Phillips screwdriver
- New air filter
Step 1 - Unscrew the air intake assembly cover
After opening the car hood, look to the passenger’s side where the plastic covering for the air intake assembly sits. There are three push-pins and a one flat head screw holding the plastic cover in. The pins are circled in figure 1. Press the center of the pins in to pop them out. Remove the cover to get access to the air intake assembly.
Step 2 - Unclip the air box
There are four metal clips securing the air filter cover to the assembly. Squeeze the clips, and pull them from the cover.
Pro Tip
Be attentive when pulling the clips; they've been known to fall off and get lost under the engine. They're small and plastic, so finding one that's dropped will be a chore.
Step 3 - Replace the air filter
Remove the worn out filter and insert the new one. Then, replace every component earlier removed in the reverse manner.
Pro Tip
The ideal time to replace the Lexus IS air filter also depends on the environment. If your typical environment is dusty, it’s advisable to check your filter condition frequently. A clean air filter improves gas mileage by up to 14% and acceleration by up to 11%, the equivalent of saving $0.15 per gallon.
Featured Video: How to Replace Air Filter in Lexus IS
Related Discussions and Sites
- DIY How to Replace Air Filter on Lexus IS 250/IS 350 - ClubLexus.com
- How to Tell if Your Air Filter Needs Changing - CarsDirect.com
- Engine Air Filter and Cabin Filter Lexus IS 250 - ClubLexus.com