5 spots most 4WD owners don’t clean properly

After a beach run, muddy track or dusty weekend away, it’s pretty easy to focus on the obvious stuff.

Foam the paint.
Rinse the tyres.
Clean the windows.
Stand back and call it done.

But the areas that usually matter most are the ones that don’t get much attention.

Salt, sand, mud and red dirt don’t just sit on the outside of your 4WD. They get pushed into wheel arches, brackets, seams, guards, trays, suspension components and chassis rails — then sit there long after the paintwork looks clean.

Here are 5 spots worth cleaning properly after your next trip.

1. Inside the wheel arches

Wheel arches cop a constant spray of saltwater, sand, mud and road grime. The mistake many people make is only rinsing the visible face of the guard.

To clean them properly, spray from multiple angles — front, rear and underneath — not just straight at the arch. Pay attention to the lip of the guard, inner liners, plastic clips and any edges where mud can pack in.

If you’ve been through mud, don’t just blast the surface. Let the water soften the build-up first, then work it out gradually so you’re not forcing grit into the paint, plastics or seals.

2. Behind mud flaps and around mounting points

Mud flaps are great at stopping spray, but they also create a perfect little trap for sand, salt and dirt.

This area is easy to miss because it often looks fine from the outside. The build-up usually sits behind the flap, around the bolts, brackets and lower guard area.

When cleaning, spray behind the flap from both sides if you can. Check the mounting points and lower edges, especially after beach driving. These areas can stay wet longer than the rest of the vehicle, which is exactly what you don’t want when salt is involved.

3. Under trays, bash plates and side steps

Under trays and bash plates are there to take a hit, but they also hold onto everything you drive through.

A quick rinse from the front doesn’t always clear them out. Mud, sand and small stones can sit on top of plates, inside gaps and around brackets. Side steps and rock sliders can also hold water and grime, especially around joins and drain holes.

The key here is angle. Spray from the front, back and sides where possible. If you can see drain holes, seams or folded edges, give them extra attention. The aim is not just to rinse what you can see — it’s to move the trapped muck out of the spots where it settles.

4. Suspension components and brackets

Springs, shocks, control arms, sway bar mounts and brackets are all magnets for mud and sand.

These areas are often skipped because they’re awkward to reach, but they’re constantly exposed underneath the vehicle. Mud can dry hard around components, and beach sand can sit around bushes, brackets and bolt heads.

You don’t need to go overboard, but you do want a consistent rinse from different angles. Avoid hammering sensitive seals or boots up close with high pressure. Instead, use enough pressure to shift the grime without treating every component like a concrete driveway.

This is one of those areas where a patient, methodical rinse beats a quick blast.

5. Inside the chassis rails

This is the big one.

The outside of the chassis might look clean, but the inside can still be holding salt, sand, muddy water and fine grit. After beach driving especially, this is one of the most important areas to flush.

The trap is thinking a normal rinse underneath has sorted it. In reality, water from a hose or pressure washer often hits the outside of the chassis and runs off, without properly flushing the internal rails.

A proper clean means getting water moving through the chassis, not just around it. You want to flush from multiple access points where possible and keep going until the water running out looks clear.

It’s not the most exciting part of the wash, but it’s one of the most important if you actually use your 4WD the way it’s meant to be used.

Want to make these areas easier to clean?
The right setup helps you reach tighter spots, clean underneath properly and flush out the areas a standard wash usually misses.

Short Gun Upgrade
Better control around wheel arches and tight spots.

Underbody Maxx
Designed to clean underneath without crawling around.

Chassis Flush Kit
Flushes hidden salt, sand and mud from inside chassis rails.