Skid Plate Kit for the 5th Gen 4Runner
Trail Edition and TRD Pro 4Runners come with factory skid plates — but they're thin stamped steel that covers the engine only. Aftermarket full skid systems extend that protection to the transfer case, fuel tank, and rear differential with heavier material that can take a real hit.
The 5th gen 4Runner Trail Edition and TRD Pro trims include factory aluminum skid plates on the engine and front underbody. SR5 and Limited trims have no factory skids at all. In either case, aftermarket full skid kits improve coverage and material thickness. The factory plates are 3mm aluminum and sized only to protect the oil pan and front crossmember — they won't handle a direct rock hit on the transfer case or a high-centering event on the fuel tank.
ASFIR's full kit is the most comprehensive option — it covers the front crossmember, oil pan, transmission, transfer case, fuel tank, and rear differential in 3/16" steel. That's the deepest coverage available for the 5th gen. CBI Offroad's kit uses similar coverage with slightly lighter materials and a lower price point. Slick Rock Fabrications offers a steel kit at the most accessible price but with somewhat lighter gauge material — suitable for mild to moderate trail use.
The 4Runner's independent front suspension means the front skid attaches to the frame and subframe, not the lower control arms as on solid-axle vehicles. This matters because the skid must flex slightly relative to the suspension travel on IFS designs — most aftermarket kits account for this with slotted mounting holes or flexible bracket designs. Verify that the skid you're ordering is designed specifically for the 5th gen IFS architecture.
The fuel tank skid is particularly important on the 4Runner. The factory fuel tank on the 5th gen hangs relatively low and is exposed behind the rear axle. High-centering on a rock shelf can contact the tank directly — a 3/16" steel skid prevents that from being a trip-ending event.
Steps
- Lift and support vehicle on jack stands; provide full underbody access
- Remove OEM factory skid plates on Trail/TRD Pro trims — typically 4–6 bolts per piece
- Clean mounting surfaces; inspect for corrosion at frame mounting points
- Test-fit each skid section dry to confirm fitment before installing hardware
- Install front crossmember/oil pan skid first; use existing OEM holes where possible
- Install transmission and transfer case skid — use a floor jack as an assist for the heavy center piece
- Install fuel tank skid, ensuring clearance around fuel fill neck and tank straps
- Apply anti-seize to all hardware
- Torque all fasteners to spec; verify clearance between skids and driveshafts by rotating shafts by hand
- Lower vehicle and roll forward slowly to confirm no binding or noise from skid contact
Why it works
- ASFIR full kit covers every major underbody component in one purchase
- 3/16" steel handles direct rock impacts that destroy the factory aluminum plates
- Slick surfaces on steel skids allow the truck to slide over rocks rather than snag
- CBI kit includes additional frame reinforcement brackets not found in factory skid mounting
- Trail and TRD Pro factory plate removal is clean — aftermarket units use the same bolt holes on most designs
Trade-offs
- Full steel kit adds 70–110 lbs of underbody weight
- 5th gen IFS architecture requires IFS-specific mounting design — do not use a generic skid or one not spec'd for the 5th gen
- Slick Rock Fabrications kit uses lighter gauge material — adequate for mild use, may deform on a direct rock hit at speed
- Some kits reduce ground clearance by 1/4"–3/8" depending on design — measure before ordering for rock-crawling use
- Fuel tank skid must clear tank straps and fill neck — installation requires care to avoid pinching or stressing the tank mounting hardware
Tools required
- floor jack
- jack stands
- socket set
- torque wrench
- drill and bits
Parts
| Part | Vendor | Est. price |
|---|---|---|
| ASFIR 4Runner Full Underbody Skid Kit (5th Gen) | ASFIR | ~$849 |
| CBI Offroad 4Runner Skid Plate Kit (5th Gen 2010-2024) | CBI Offroad | ~$749 |
| Slick Rock Fabrications 4Runner Skid Plate System (5th Gen) | Slick Rock Fabrications | ~$599 |
| Rock Slide Engineering 4Runner Skid Plates (5th Gen) | Rock Slide Engineering | ~$699 |
Sources
Related
- Steel Front Bumper for the 5th Gen 4Runner
- Rock Sliders and Frame Rails for the 5th Gen 4Runner
- All Toyota 4Runner guides & tools
- Browse the full DIY database
Written and maintained by an AZ wheeler and driveway wrencher. How we source guides. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.