My Account About Us Help Desk
Go-Parts
Account About Us Help Desk
Cart 0
Your cart is empty
Add an item to see it appear here.
2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003 Toyota 4Runner Differential
View 1
View 2
View 3
View 4
View 5

2003 - 2023 Toyota 4Runner Differential (ARB) NEW

$ 1,358 .01
120-DayReturns
LifetimeWarranty
100%Money-Back

Product Notes Read before buying

Axle: Toyota 8" Clamshell Shaft: 1.31" Spline: 30 Ratio: 3.73 and down Confirm stock gear ratio. Confirm aftermarket 'thick' or standard gear with gear supplier
Differential
The world's premier traction aid, an ARB Air Locker keep you moving in all conditions. With the flick of the switch an Air Locker gives instant lock at any moment and its super strong design allows activation at any speed allowing you to tackle the toughest terrain. The advantage of the Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker prevents the internal differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the ring gear, the vehicle maintains maximum possible traction at all times. When unlocked, it operates like a conventional open differential. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.
Brand: ARB
Condition: New
See Other Toyota 4Runner Differentials
Wrenchy the Robot
Not sure? Ask Wrenchy — Your Parts Assistant.

Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.

Specifications & Info


Attribute Value
Color Silver
Fitment Info 1 Axle: Toyota 8 In Clamshell; Position: Front; Shaft: 1.31 In; Spline: 30; Ratio: 3.73 Down
Material Steel
Prop 65 Yes/No No
Title Arb - Rd121 - Air Locker Differential

Vehicle Fitment Guide

This part fits the following vehicles:

Toyota 1 model (tapclick to expand)(tapclick to hide)
4Runner 2003-2023 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
40th Anniversary Edition SUV 2023 V6 4.0L RWD/4WD Automatic
Base SUV 2017 - 2018, 2020 - 2021 V6 4.0L 4WD Automatic
Limited SUV 2003 - 2023 V6 4.0L RWD/4WD Automatic
Limited SUV 2003 - 2009 V8 4.7L RWD/4WD Automatic
Nightshade SUV 2020 - 2022 V6 4.0L 4WD Automatic
Nightshade SUV 2020 - 2021 V6 4.0L RWD Automatic
SR5 SUV 2010 L4 2.7L RWD/4WD Automatic
SR5 SUV 2003 - 2023 V6 4.0L RWD/4WD Automatic
SR5 SUV 2003 - 2009 V8 4.7L RWD/4WD Automatic
SR5 Premium SUV 2018 - 2023 V6 4.0L RWD/4WD Automatic
Sport SUV 2003 - 2009 V6 4.0L RWD/4WD Automatic
Sport SUV 2003 - 2009 V8 4.7L RWD/4WD Automatic
TRD Off-Road SUV 2017 - 2023 V6 4.0L 4WD Automatic
TRD Off-Road Premium SUV 2018 - 2023 V6 4.0L 4WD Automatic
TRD Pro SUV 2015 - 2023 V6 4.0L 4WD Automatic
TRD Sport SUV 2022 - 2023 V6 4.0L RWD/4WD Automatic
Trail SUV 2021 - 2022 V6 4.0L RWD Automatic
Trail SUV 2010 - 2016, 2021 - 2022 V6 4.0L 4WD Automatic
Venture SUV 2020 - 2022 V6 4.0L 4WD Automatic
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies, in plain English.

Shipping Information

We offer fast, reliable shipping on all orders:

  • Ships to all countries via US Postal Service Priority Mail.
  • Most orders ship within 1 business day.
  • Delivery time: 1-4 business days after shipment.
  • International shipping available, including APO/FPO addresses.
  • Tracking information provided for all shipments.
  • Additional handling fees may apply for oversized/overweight packages.

Lifetime Warranty

This part comes with a limited lifetime warranty. Warranty begins on the original purchase date.

Warranty does NOT cover:

  • Shipping costs or labor expenses.
  • Installation errors.
  • Parts used for racing.
  • Commercial vehicle parts.

Returns (120 Days)

We want you to be 100% satisfied with your purchase. That's why we offer:

  • 120-Day Returns - Return any part within 120 days from date of receipt.
  • Must obtain RMA (Return Merchandise Authorization) number before returning.
  • Parts must be in original condition, uninstalled, unaltered, and in original packaging.
  • Important: Electrical parts are not returnable if unsealed.
  • Please inspect parts upon arrival and notify us within 5 days of receiving incorrect or damaged parts.
  • Refunds processed after warehouse receives return and credited to original payment method.
The world's premier traction aid, an ARB Air Locker keep you moving in all conditions. With the flick of the switch an Air Locker gives instant lock at any moment and its super strong design allows activation at any speed allowing you to tackle the toughest terrain. The advantage of the Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker prevents the internal differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the ring gear, the vehicle maintains maximum possible traction at all times. When unlocked, it operates like a conventional open differential. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.

Fits Years: 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023

Fits Models: 4Runner

Why Millions Choose Go-Parts

Your Go-To Place
for auto parts.

In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.

100%
Money-Back Guarantee

Shop With Total Confidence

If it doesn't fit, we make it right. No gimmicks, no fine print.

120
Day Return Window

4× the Industry Standard

Most retailers stop at 30 days. We give you a full four months to install, test, and return for a 100% refund — return shipping on us.

NEW
Direct-Fit Replacement

Engineered To OEM Specs

Brand-new aftermarket parts from trusted suppliers — built to original-equipment specifications so they fit and function like the factory unit, at a fraction of the price.

What buyers are saying.

★★★★★ 4.9 1,451 verified reviews

Racing Partner Videos

Racing partner video
Racing partner video
Racing partner video
Racing partner video
×

Search by Vehicle

1
2
3
Added to cart · Part