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

General / Misc

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Service Intervals

{{ image('MzUx') }} Question:I'm really confused about auto service intervals for various items on my car. Help!John's 4X4 Center Answer:The simple answer for Boulder residents is to follow the vehic...
Published on: Jan 05, 2025

A Pan You Don't Cook In (Oil Pan Gasket Replacement)

You probably have a cabinet in your kitchen filled with pots and pans. Your vehicle has one very important pan in it as well. It's the pan that holds oil for your engine called, naturally, an oil pan....
Published on: Sep 15, 2024

How Tired Are Your Tires? (Tire replacement)

Of the things you think about most, your tires are probably pretty far down the list. That’s understandable because today’s tires are engineered to do their job without needing you to pay ...
Published on: Jul 28, 2024

The John's 4X4 Center Guide to Buying a Used Vehicle

{{ image('MzU2') }} Used vehicles are certainly an economical choice for budget-conscious Boulder drivers. But how can we know we're getting a good used vehicle and not just inheriting someone else's...
Published on: Jun 23, 2024

A Bright Spark (Ignition Coil Replacement)

Ever wonder how your vehicle’s engine is able to take the 12-volts from its battery and ramp that up to as high as the tens of thousands of volts it takes to fire its spark plugs? The secret is ...
Published on: Jun 16, 2024

Feeling Powerless (Why Is My Battery Light On?)

When one of your vehicle’s warning lights comes on, the first thing that comes to mind is, “Oh, no, what’s wrong now?” When it’s the battery light, it means there’s...
Published on: Mar 28, 2024

Visual Blind Spots When Driving Around Boulder CO

When we drive on our Boulder CO streets, we encounter blind spots. We can greatly reduce our blind spots by properly adjusting our mirrors to give the widest coverage possible. Make the adjustments to...
Published on: Oct 29, 2023

MAF Sensor and Engine Air Filter

Today's John's 4X4 Center post focuses on the importance of protecting your mass air flow sensor or MAF. Air and fuel are mixed together to be burned in your engine. The amount is controlled by how ha...
Published on: Oct 15, 2023