Pre-Purchase Inspection: What to Look for on an FJ40

The FJ40 market is not forgiving.

Prices have climbed steadily, clean examples are harder to find, and there are a lot of trucks out there that look better in photos than they do in person. If you’re serious about buying one, knowing what to look for before you hand over money is the difference between a great purchase and an expensive lesson.

Here’s what actually matters.

Start With the Frame

Everything else is secondary to this.

The FJ40 frame is the foundation of the truck. Rust, cracks, previous repairs, and damage from years of off-road use all show up here. A frame that’s been compromised changes the entire conversation about what the truck is worth and what it will cost to put right.

Get underneath and look carefully. Look at the frame rails, the crossmembers, and anywhere that tends to trap moisture and debris. Previous repairs aren’t automatically a dealbreaker, but they need to be understood. A bad weld or a patch that’s hiding something worse matters.

If the frame isn’t solid, the rest of the truck doesn’t matter much.

Body and Tub Condition

After the frame, the tub and body panels are the next thing to look at closely.

Rust in the floor, around the door jambs, and in the lower corners of the tub is common on these trucks. Some of it is cosmetic. Some of it goes deeper. The difference matters for both safety and cost.

A lot of FJ40s have been through body work over the years. Some of it was done well. Some of it was done to make the truck look presentable without actually addressing what was underneath. Take your time here and look past the surface.

Engine and Drivetrain

Most FJ40s in the U.S. came with the F or 2F engine. Both have good reputations when they’ve been maintained properly.

What you’re looking for is evidence of that maintenance. Oil leaks, coolant leaks, smoke on startup, and how the engine sounds at idle and under load all tell you something. A compression test is worth doing on any serious candidate.

The drivetrain — transfer case, axles, differentials — needs to be checked for leaks, wear, and function. These components are tough, but they’re also old. Knowing what’s been serviced and when matters.

Previous Modifications

Almost every FJ40 you look at has been modified in some way. Engine swaps, suspension lifts, brake upgrades, electrical changes — it’s rare to find one that’s completely stock.

Modifications aren’t a problem in themselves. What matters is how they were done.

Quality work done with the right parts is one thing. Modifications done on the cheap, by someone who didn’t know what they were doing, or left half-finished are another. Look at the quality of the work and ask questions about who did it and when.

Wiring is a particular area to pay attention to. FJ40 electrical systems that have been modified or repaired over the decades can be a real project to sort out.

Rust Throughout

With any FJ40, rust is always part of the conversation — not just on the frame and body, but everywhere.

Brake lines, fuel lines, hardware, hinges, and smaller components all corrode over time. A truck that’s solid on the outside can still have rust problems in places that are easy to miss on a casual inspection.

This is where having someone who knows these trucks look at it carefully pays for itself.

What It’s Actually Worth

FJ40 prices have gotten to a point where a thorough inspection before you buy is more important than ever.

The gap between what a truck looks like and what it actually is can be significant. And at current prices, buying something that needs major work without knowing that going in is a costly mistake.

How We Can Help

At OTM, pre-purchase inspections on FJ40s are something we take seriously. We go through the truck the same way we would if we were buying it ourselves — frame, body, drivetrain, mechanicals, previous modifications, and everything in between.

You’ll come away with a clear picture of what the truck is, what it needs, and whether the asking price makes sense for what you’re getting.

Before you commit, let us take a look. It’s worth the time. Drop us a line or call (205) 420-2130 to set something up.