Toyota 4Runner Electrical Guides
Source the root of your 4Runner's electrical problems with our diagnostics and guides here. Weak headlights, starter issues, check engine lights and the smell of burning plastic are all symptoms of electrical issues in your SUV. We'll walk your though basic maintenance and upgrades that will keep your 4Runner all charged up.
How to Replace Battery
Did your car suddenly stop cranking?
How to Replace Spark Plugs and Wires
Change your spark plugs early – your engine will thank you.
How to Jump Start Battery
Never get stranded again by following these simple steps for jump starting your battery.
How to Replace Oxygen (O2) Sensor
Has your 4Runner been losing fuel efficiency? It probably has a bad O2 sensor.
Electrical Diagnostic Guide
Don't let the electrical gremlins win. Read this and learn how to diagnose electrical problems.
How to Replace Starter
Having problems starting your truck? Here is how to fix it.
How to Replace Alternator
Make sure your battery gets charged as it should.
How to Replace Distributor
Experiencing a rough idle, or a shaking and sputtering engine? Do something about it now.