Product details
  • SKU QMCSQ0006

OUSIMY Rear Differential Viscous Coupler for Toyota RAV4 2006-2021 | OE 41303-42023

In stock
Usually ships within 24 hours
Regular price $269.99
Product details
  • Vendor OUSIMY SHOP
  • SKU QMCSQ0006
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Fast & Reliable Shipping:

We understand that vehicle repairs cannot wait.

All OUSIMY orders are processed within 24 business hours after payment confirmation.

Shipping Options:

β€’ Standard Shipping:
Delivery usually takes 7-15 business days depending on destination.

β€’ Expedited Shipping:
Faster delivery options are available for customers who need their parts sooner.

β€’ Tracking Information:
Once your order ships, tracking details will be provided by email.

Please make sure your shipping address is correct before completing your order.

Warranty Policy:

At OUSIMY, we stand behind the quality and reliability of our automotive parts.

All products include a 3-Year Limited Warranty.

The warranty covers:
β€’ Manufacturing defects
β€’ Product quality issues
β€’ Failures under normal use conditions


If you experience any product issue, please contact our support team. We will provide assistance including troubleshooting, replacement, or other solutions.

Warranty does not cover:
β€’ Incorrect installation
β€’ Damage caused by accidents
β€’ Improper use
β€’ Normal wear and tear

30-Day Money-Back Guarantee:

Your satisfaction is important to us.

If you are not completely satisfied with your purchase, you can request a return within 30 days after receiving your order.

Return requirements:

β€’ Product must be unused
β€’ Product must be in original condition
β€’ Original packaging should be included


If you receive an incorrect or defective item, please contact us first. Our team will help resolve the issue as quickly as possible.

Vehicle Fitment & Technical Support:

Not sure if this part fits your vehicle?

Our automotive support team is here to help you find the correct replacement part before placing your order.

We can assist with:

βœ“ Vehicle compatibility confirmation
βœ“ OEM / Part number verification
βœ“ Product selection assistance
βœ“ Installation questions


To help us confirm the correct fitment, please provide:

β€’ Vehicle Make & Model
β€’ Year
β€’ Engine Type
β€’ OEM Part Number (if available)
β€’ VIN Number (optional)


Need help choosing the right part?

Click the chat icon in the bottom right corner and send us your vehicle information. Our team will help verify compatibility and recommend the correct replacement solution.

OE Part Number: 41303-42023
Specification Details
Condition New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.Β 
California Prop 65 Warning California Prop 65 Warning
Fitment Type Direct Replacement
Manufacturer Part Number KHMR CV
Note No Instruction Included
OE/OEM Part Number 4130342023, 4130342020, 4130342021, 4130342022
Superseded Part Number Differential, Rear Differential Coupling, Coupling Assy, Viscous Coupler, Transmission, Transmission Coupling, Transmission Viscous Coupling, 4-Door, 4WD, 2.0L L4, 2.4L L4, 2.5L L4, 3.5L V6
Type Transmission Coupling Assy
Warranty 2 Year
Country of Origin China
Brand OSUIMY
Fit for Toyota RAV4 2006-2017, for Lexus NX200t 2015-2017, for Lexus NX300h 2015-2017
Interchange Part Number 41303-42023, 41303-42020, 41303-42021, 41303-42022
Manufacturer Warranty 3 Years
Notice This is aftermarket replacement part
Placement on Vehicle Lower, Rear
Surface Finish Brand New
Universal Fitment No
UPC Does not apply
This rear differential viscous coupler acts as a direct OEM replacement torque transfer component built exclusively for 4WD Toyota RAV4 spanning model years 2006 through 2021, managing power distribution to the rear axle and maintaining the stable operation of the factory all-wheel drive system.
This unit adopts die-cast aluminum housing paired with high-temperature resistant internal viscous fluid and multi-layer fluorine sealing gaskets. It mounts between the driveshaft and rear differential assembly of your RAV4 four-wheel drive system. All mounting points, spline sizes and overall external dimensions fully match factory OEM specifications, so no cutting, drilling or structural modification is required to complete installation for all compatible RAV4 4WD trims within the listed year range.

We reinforce the outer housing wall thickness and upgrade the anti-aging seal rings compared to original factory couplers. The improved internal fluid formulation resists thinning and degradation under prolonged highway driving and rough terrain use, greatly slowing oil leakage and performance decay. The entire assembly comes fully pre-sealed and pre-calibrated from production, eliminating messy fluid refilling and complicated internal disassembly work to simplify both shop and DIY installation.
This replacement viscous coupler resolves widespread common defects on aging Toyota RAV4 AWD systems, including clunking and grinding noise during low-speed turns and acceleration, noticeable vehicle shudder and vibration at mid-range speeds, delayed or partial engagement of four-wheel drive, persistent fluid seepage around the rear differential connection area, and premature component failure that forces frequent repeat part swaps and unnecessary maintenance costs.

It eliminates OBD scan tool trouble codes related to AWD torque distribution faults and rear driveline performance malfunctions triggered by a worn or failed original viscous coupler.
Complimentary free standard shipping is offered to all destinations across the United States. Every in-stock order will be shipped out within 1 business day after payment confirmation, dispatched directly from our US warehouse to deliver fast transit speed and full package tracking information.

Each OUSIMY rear differential viscous coupler is covered under a 2-year limited manufacturer warranty against factory defects. Installation steps align with the official Toyota service repair manual, and basic hand tools are sufficient for experienced vehicle owners to finish the replacement independently and avoid expensive dealership labor charges.
Full Compatible Vehicle List:

Toyota RAV4 4WD 2006

Toyota RAV4 4WD 2007

Toyota RAV4 4WD 2008

Toyota RAV4 4WD 2009

Toyota RAV4 4WD 2010

Toyota RAV4 4WD 2011

Toyota RAV4 4WD 2012

Toyota RAV4 4WD 2013

Toyota RAV4 4WD 2014

Toyota RAV4 4WD 2015

Toyota RAV4 4WD 2016

Toyota RAV4 4WD 2017

Toyota RAV4 4WD 2018

Toyota RAV4 4WD 2019

Toyota RAV4 4WD 2020

Toyota RAV4 4WD 2021