Upgrade Your 2025 Toyota 4Runner: Rally Armor Mud Flap Installation Guide

The 2025 Toyota 4Runner is a great SUV. But if you have an SR5 model, you might notice it lacks factory mud flaps. Even other 4Runner models often come with small, hard plastic mud guards. These stock parts offer little protection. Installing Rally Armor mud flaps changes this. They provide much better coverage and protection for your vehicle and others on the road. This guide walks you through the installation process.

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Why Rally Armor Mud Flaps Are a Smart Choice

Rally Armor mud flaps are different from standard mud guards. They offer superior protection and durability. This is especially true for the 2025 Toyota 4Runner.

Superior Coverage for Any Tire Setup

Original equipment manufacturer (OEM) mud flaps are often small. They may not cover larger wheels and tires. Many 4Runner owners upgrade their tires for better off-road performance or a custom look. Rally Armor mud flaps give greater coverage. They protect your vehicle from dirt and debris. This means less mud and gravel flying onto your paint, even with bigger tires.

Built to Last and Flex

The material used in Rally Armor mud flaps is unique. It is a special blend that works perfectly for mud flaps.

• Heavy enough to knock down dirt and debris. This keeps it from spraying onto your car or other vehicles.
• Light and flexible enough to bend. If you hit something while off-roading, the mud flap will give way. It can fold without breaking. This is a huge benefit compared to stiff plastic guards.

Rally Armor also designs custom brackets. These brackets hold the mud flaps firmly in place. They keep the mud flaps straight. This prevents awkward angles. The mud flaps sit perfectly straight down and side-to-side once installed.

Tools You Will Need

Before you start, gather your tools. Having everything ready makes the installation go smoothly.

• 1/4-inch ratchet
• 10mm socket
• 12mm socket
• Screwdriver with adapter socket
  • Phillips head bit
  • Flathead bit (for removing factory plastic fasteners)

Preparing for Your Mud Flap Installation

Good preparation saves time and trouble. Follow these steps before you begin installing.

Check Your Parts Inventory

Your Rally Armor mud flaps come with instructions. They also include a full list of parts.

1. Open the box. Lay out all the parts.
2. Compare them to the inventory list.
3. Check for missing parts. Sometimes, a manufacturer might leave out a piece.
4. Contact customer service if anything is missing. Do this before you get deep into the installation.

Review the Diagrams

The instructions include diagrams. Look at all of them carefully. Pay special attention to the exploded diagram on the back. This diagram shows how all the fasteners and parts fit together. It helps you understand the alignment before you start.

Remove Factory Mud Guards (If Equipped)

If your 4Runner has factory mud guards, you must remove them first.

1. Use a flathead screwdriver.
2. Carefully pry out the plastic fasteners that hold the factory mud guards.
3. Remove the entire factory mud guard.

Installing the Front Mud Flaps

You will install the front mud flaps on the passenger side first. This guide focuses on the passenger side. You will then repeat these steps for the driver's side.

Remove Factory Bolts

1. Locate the four fasteners holding the fender liner.
2. Use a 10mm socket and your ratchet to remove them. This is easier than using a Phillips head screwdriver.
3. If you save factory hardware, put these bolts in a separate box. Keep them away from the new hardware.

Install Foam Spacers

Foam spacers ensure the mud flap sits flat. This prevents it from bowing out.

1. Clean the area where the bolts were removed. Make sure it is free of dirt.
2. Take one of the smaller foam spacers. Remove its backing.
3. Align the spacer over a bolt hole. Ensure it is centered. You may need a flashlight to see the hole clearly.
4. Repeat for the other three holes.
5. Take the larger foam piece. Test fit it first. Then remove its backing and apply it.

Insert Clip and Front Spacer

One hole requires a special clip.

1. Push the fender liner back slightly.
2. Insert the clip over the hole. You will hear a click when it seats correctly.
3. Make sure the fat part of the clip faces towards the rear of the vehicle.
4. Place a small spacer on the front side of this clip. Center it as much as possible.

Prepare the Front Bracket

You will use a bracket labeled BMF96/RE.

1. Clean the surface of the bracket.
2. Apply the provided sticker to the bracket. This sticker helps hide the silver bracket under the vehicle.

Attach the Bracket to the Vehicle

1. Locate the factory bolt that screws into a plastic piece.
2. Remove this factory bolt.
3. Position the BMF96/RE bracket. The stud on the bracket should be on the high side. Do not flip the bracket backwards.
4. Screw the bracket into place using the same factory bolt you just removed.
5. Do not fully tighten this bolt yet. Keep it loose enough to adjust the bracket. You will tighten it fully at the end. Make sure the bracket can move in and out slightly. This lets you adjust how the mud flap lays.

Attach the Mud Flap to the Bracket

1. Take a Rally Armor mud flap. The logo side faces outwards. The mud flap attaches to the side opposite the logo.
2. Use the small plastic bolts, plastic nuts, and plastic washers.
3. Push a plastic bolt through the mud flap and the bracket.
4. Place a plastic washer on the other side.
5. Screw on a plastic nut. The nuts face the logo side of the mud flap.
6. Hand-tighten these fasteners for now. You will tighten them more later for final alignment.

Secure the Mud Flap to the Vehicle Body

Now, attach the top of the mud flap to the fender liner.

1. At the very top hole, use a 1.5-inch screw and plastic washer. Hand-tighten it into the foam spacer.
2. For the next hole down, use another 1.5-inch screw and plastic washer. Align it carefully.
3. For the hole below that, use another 1.5-inch screw and plastic washer.
4. For the small stud, use a plastic washer and a stainless steel lock nut. You may need to push the mud flap out a little to align this.
5. For the last hole, use a 1-inch stainless steel screw and plastic fastener.

Final Adjustments and Tightening (Front)

Before tightening everything, check the mud flap's position.

1. Consider your tire width. If you have wide tires, you might want the mud flap to poke out more. If your tires are stock or less wide, push the mud flap all the way in.
2. Make sure the mud flap is straight up and down. Ensure the bottom edge runs horizontally with the ground.
3. Once happy with the position, hand-tighten the plastic bolts on the mud flap.
4. Tighten the 12mm lock nut on the stud.
5. Use a Phillips head screwdriver or your ratchet to tighten the screws into the plastic. Do not overtighten. These screws go into plastic and foam spacers. Overtightening can cause the mud flap to bow out.
6. Tighten the 10mm bolt holding the mounting bracket to the vehicle. Make it nice and tight.

Your front mud flap installation is now complete.

Installing the Rear Mud Flaps

Move to the rear of the vehicle to install the rear mud flaps.

Remove Rear Plastic Fasteners

1. Locate the two small plastic fasteners at the rear.
2. Remove them. You will replace them with new hardware.
3. Take the new hardware provided. It includes a clip with a small screw. Remove and discard the small screw. You only need the clip.
4. Push the clip into the holes where you removed the fasteners. This creates a secure point for new screws.

Replace Inner Bolt

1. Get under the vehicle.
2. Locate the inner bolt.
3. Remove this bolt. You will use a new one provided in the kit.

Prepare and Attach Rear Bracket

You will use a bracket labeled BMF88-1.

1. This bracket has a stud on the high side. It also has a spacer.
2. You will use the elongated hole on the bracket, not the perfect circle.
3. Take a 1-inch stainless steel screw.
4. Place a plastic washer on the screw.
5. From the underside of the vehicle, screw the new bolt through the elongated hole and into the vehicle.
6. Leave this bolt loose. You need to install a foam pad behind the bracket.

Install Rear Foam Pad

1. Clean the area directly behind the bracket.
2. Take the provided foam pad.
3. Pull the bracket forward slightly.
4. Position the foam pad behind the bracket.
5. Push the bracket back over the foam pad.

Attach Mud Flap to Rear Bracket

1. Take a rear mud flap. Identify the side with injection-molded circles. Face these circles against the vehicle for a cleaner look.
2. Align the mud flap with the bracket.
3. For the top hole, use a 1.5-inch screw and a plastic washer.
4. For the other main hole, use another 1.5-inch screw and a plastic washer.
5. Do not tighten these screws fully yet. You need to adjust the alignment.
6. For the inner stud, use a plastic washer and a stainless steel lock nut.

Final Adjustments and Tightening (Rear)

1. Step back and look at the mud flap from the rear of the vehicle.
2. Ensure it hangs vertically and straight.
3. If you want the mud flap to stick out less, gently push it inward while tightening.
4. Use your Phillips head screwdriver or ratchet to tighten all the screws. Remember, they screw into plastic, so do not overtighten.
5. Make sure everything is tightened down evenly. Check for any loose parts.
6. Double-check the alignment one last time.

Conclusion

Installing Rally Armor mud flaps on your 2025 Toyota 4Runner is a great upgrade. These mud flaps offer superior protection compared to factory options. Their durable, flexible material handles both road debris and off-road bumps. The detailed installation process ensures a custom fit.

Once installed, step back and admire your work. The mud flaps improve your vehicle's look and function. They are also ready to handle any larger wheels and tires you might add in the future. Enjoy your enhanced 4Runner!

You can find these specific Rally Armor mud flaps for your 2025 and newer Toyota 4Runner at StickerFab.