2015 Toyota 4Runner Upper Control Arms

Upper Control Arms Built for 2015 4Runner Suspension

Your 2015 4Runner front suspension relies on upper control arms to manage wheel articulation and alignment under load. Factory arms use sealed bushings that wear out and can't be serviced. JBA upper control arms, like the 2019 4Runner control arm, replace that design with rebuildable components you can maintain on your own schedule.

Each arm features eight individual grease ports with pressure relief valves. You control the maintenance interval. You decide when to grease. No guessing when sealed suspension components will fail on the trail.

EZ Lube Bushings Replace Factory Sealed Parts

EZ Lube Bushings are the core of this design. Eight grease ports feed lubrication directly to contact surfaces. Pressure relief valves prevent over-greasing. You service the bushings in minutes without removing the arm from your 4Runner.

This matters when you're running a lift kit or oversized tires. Increased suspension travel and load amplify wear on every suspension part. Sealed lower control arm bushings and ball joints degrade faster under those conditions. JBA arms let you address wear before it becomes a failure.

Max 90 Ball Joints for Front Articulation

Max 90 Ball Joints are CNC-machined from 4140 chromoly steel. They deliver 90 degrees of articulation at full droop. That range keeps your front wheels planted on uneven terrain where factory ball joints bind or lose contact.

The ball joint housing is fully rebuildable. When you need to replace the stud or bearing surface, you disassemble the joint and install new parts. You don't replace the entire control arm. This design has been deployed in jungle fleet operations and expedition builds where component failure isn't an inconvenience; it's a safety crisis.

Lifetime Structural Warranty Backs Every Arm

JBA stands behind the structural integrity of every 2020 Toyota 4Runner upper control arm with a lifetime warranty. If the arm itself fails due to material or manufacturing defect, we replace it. No time limit. No mileage cap.

Wear items like bushings and ball joints are serviceable parts, not covered under the structural warranty. That's the point. You maintain those components as needed. The arm itself is built to last the life of your 4Runner.

Why This Matters for Your 2015 Build

The 2015 model year marked important events in Toyota's 4Runner timeline. The fourth-generation platform was five years into its production cycle. Aftermarket suspension components had matured. Builders were pushing these rigs harder, from rear differential upgrades to dynamic suspension setups that demanded more from front control arms.

JBA has been engineering upper control arms since 2003. We built the first aftermarket UCA for the Jeep Liberty and refined that design through four generations. The arms on this page represent Gen 4.5 engineering. Every specification, from bushing placement to ball joint articulation, reflects two decades of real-world feedback.

What You Get When You Order

Each kit includes a pair of upper control arms, Max 90 Ball Joints installed, EZ Lube Bushings installed, and all necessary hardware. You'll also receive a grease fitting kit and installation instructions. Most builders complete the install in three to four hours with basic hand tools.

If you're running a fleet or planning an expedition build, contact us directly. We'll walk you through the spec sheet and answer technical questions about fitment, alignment, and maintenance intervals. Read the full product details on each listing, then shop UCAs backed by a lifetime structural warranty.