SCITOO Front Left & Right Disc Brake Calipers Assembly

In this review the SCITOO front disc brake caliper assembly is evaluated for owners who need a direct replacement for Lexus RX350, Toyota Highlander and Toyota Sienna models from the 2010s. The bottom line: this kit is for DIY mechanics and independent shops that want a complete front driver and passenger side caliper set with brackets and robust iron pistons, and the single biggest reason to buy is the direct-fit design that arrives with mounting hardware to simplify installation and restore braking function quickly.

Key Features

• Vehicle Coverage: Compatible with Lexus RX350 and a range of Toyota Highlander and Sienna engines, making it a convenient replacement for common 2010-2018 applications.
• Complete Front Set: The kit includes both left and right front calipers with brackets so both sides are replaced together for balanced braking performance.
• Durable Pistons: Each caliper uses two iron pistons with a 1.75 in (44.5mm) diameter for proven strength under heat and load.
• OE Fitment: Supplied to match OE mounting points and ports, including M7 x 1.0 inlet and M10 x 1.0 bleeder threads, which reduces the chance of fitment issues.
• Ready to Install: Calipers are coated and tested to meet or exceed OE standards and come with mounting hardware for a direct installation without modification.

Who It's For

This caliper assembly is aimed at owners and mechanics who need an affordable, direct-replacement front caliper solution for Lexus RX350 2010-2015 and Toyota Highlander/Sienna models 2010-2018. It suits people comfortable with brake service and bleeding procedures and who prefer replacing both front calipers and brackets in one job for consistent braking.

Those who should look elsewhere include owners of non-listed model years or engine variants not mentioned in the coverage notes, and anyone unwilling to perform brake bleeding after installation; several users report the bleeding step can take extra time and attention.

Pros & Cons

Pros

• Good fit and compatibility across listed Lexus and Toyota models, reducing fitment guesswork.
• Delivered as a complete front pair with brackets and hardware, saving time sourcing parts.
• Solid construction with iron pistons and a protective coating that customers say looks and feels durable.

Cons

• Several installers report that bleeding the calipers can be time consuming and may require patience or a second person.

Specifications

Brand	SCITOO
Application	Front driver & passenger side for RX350, Highlander, Sienna
OE Numbers	19B6274 (driver), 19B6275 (passenger)
Piston Count	2 pistons per caliper
Piston Diameter	1.75 in (44.5mm)
Inlet Port Size	M7 x 1.0
Bleeder Port Size	M10 x 1.0

Our Verdict

The SCITOO front caliper assembly is a practical, value-oriented replacement for owners of the listed Lexus and Toyota models who want a ready-to-install front pair with brackets and hardware. It offers solid construction and good fitment for the price, though installers should be prepared for careful bleeding during installation. Overall it represents sensible value for DIYers and independent shops that need dependable brake hardware.

Frequently Asked Questions

Will these calipers fit my Highlander or Sienna?
They fit the listed Highlander and Sienna model years and engine types noted in the product information; confirm your vehicle year and engine before purchase.

Do these calipers come with mounting hardware?
Yes, the assembly includes brackets and mounting hardware to support direct installation without modification.

Are there any known installation issues?
Most buyers report good fit and finish, but several mention that bleeding the calipers can require extra time and attention.