DIY 4Runner Maintenance: Easy Upgrades & Checks for Weekend Wrenching

One of the best parts about owning a Toyota 4Runner is how approachable it is to work on. You don’t need a full shop or years of experience to tackle basic maintenance and small upgrades that make a huge difference in reliability. Whether you’re planning to hit the trails or just want to keep your daily driver in top shape, a weekend maintenance session is a solid investment in your rig.

Here’s a breakdown of quick DIY projects you can knock out in your own driveway.

Fluids & Filters: The Basics That Matter

It might not be glamorous, but fresh fluids and clean filters are the backbone of reliability.

• Engine Oil & Filter: Stick to Toyota’s service intervals, and always replace the crush washer on the drain plug.

• Air Filter: If you’ve been on dusty trails, swap it sooner. An upgraded filter keeps performance strong.

• Cabin Filter: Easy 10‑minute job that makes a big difference in air quality.

 Check out our 4Runner Maintenance Accessories to stock up on essentials.

Battery Health & Electrical Add‑Ons

Nothing kills a trip faster than a dead battery. Check your terminals for corrosion and clean them with a wire brush. If your battery is more than 3–4 years old, consider replacing it before overland season.

While you’re under the hood, think about adding auxiliary power upgrades like fuse blocks or a dual battery system if you run a fridge, lights, or other accessories.

 Explore our 4Runner Lighting & Electrical options to pair maintenance with functional upgrades.

Brakes: Safety First

A weekend is the perfect time to inspect your brake pads, rotors, and fluid.

• Look for uneven pad wear—could indicate caliper issues.

• Check for grooves in your rotors.

• Don’t forget brake fluid—it should be clear, not brown.

If you’re upgrading for trail use, slotted rotors and ceramic pads are worth considering.

Armor & Undercarriage Check

Trail dust and road grime love to hide underneath your 4Runner. A quick undercarriage inspection can prevent expensive surprises.

• Tighten skid plate bolts.

• Look for oil seepage around your diff or transfer case.

• Check rock sliders and armor for damage or loose hardware.

 Shop our 4Runner Skid Plates & Armor to replace or upgrade as needed.

Quick Interior & Exterior Upgrades

DIY maintenance weekends are also perfect for knocking out smaller upgrades that improve daily use.

• Swap worn floor mats for all‑weather protection.

• Add molle panels for better organization.

• Replace dim bulbs with bright LED upgrades.

 Browse our 4Runner Interior Upgrades for easy weekend mods.

Final Thoughts 

DIY maintenance keeps your 4Runner reliable, trail‑ready, and saves you money in the long run. A weekend in the driveway can tackle filters, fluids, brakes, and small upgrades that pay off big when you’re miles from the nearest service shop.

 Ready to wrench? Stock up on 4Runner Maintenance & Accessories and make your next weekend project count.