John's 4X4 Center
6367 Arapahoe Rd, Boulder, CO 80303 303.449.2640

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The Forgotten Filter (Cabin Air Filter)

A driver got a surprise the other day when he took his vehicle to a service facility for an oil change.  He knew his owner’s manual schedules an oil and oil filter change every 5,000 miles/...
Published on: Apr 08, 2024

Get Fresh Air Inside Your Car In Boulder

{{ image('Mjk4') }} CO air quality affects Boulder drivers wherever we are. Many decades ago, people began to become aware of how air pollution negatively affects health. But what about the air ...
Published on: Aug 15, 2021

Vent Cleaning

Ever get musky odors coming from your car's air vents? It's fairly common for Boulder drivers. Moisture can accumulate in the air conditioning/heating ventilation system allowing mold, mildew, fungus ...
Published on: Jul 06, 2019

Simple Answers from John's 4X4 Center: Cabin Air Filter

{{ image('MzQ4') }} Question:My car has a bad odor when I run the heater or air conditioner. My friend said I might need a new cabin air filter – what's that?John's 4X4 Center Answer:A cab...
Published on: Mar 26, 2018

Cabin Air Filter

Let's talk about cabin air filters. There seems to be some confusion about them in Boulder that we should be able to clear up. Much of the confusion starts because cabin air filters are relatively new...
Published on: Aug 22, 2016