SCITOO alternator compatibility view for Highlander and Sienna 3.5L models
SCITOO 6-groove pulley close-up showing belt engagement
SCITOO 180A front view highlights high-output readiness
SCITOO internal regulator close-up for stable voltage
SCITOO bearing test image showing durability
SCITOO OE reference numbers for easy replacement selection
SCITOO 6-groove pulley detail demonstrates precise alignment
SCITOO alternator fits Highlander and Sienna 3.5L models
SCITOO undergoing durability cycling test for reliability
SCITOO alternator compatibility view for Highlander and Sienna 3.5L models
SCITOO 6-groove pulley close-up showing belt engagement
SCITOO 180A front view highlights high-output readiness
SCITOO internal regulator close-up for stable voltage
SCITOO bearing test image showing durability
SCITOO OE reference numbers for easy replacement selection
SCITOO 6-groove pulley detail demonstrates precise alignment
SCITOO alternator fits Highlander and Sienna 3.5L models
SCITOO undergoing durability cycling test for reliability

SCITOO 180A 12V Alternator for Toyota Highlander 2017-2022 & Sienna 2017-2020 | OE 104211-0971

Overview Meet the SCITOO high output alternator, crafted as a reliable replacement for Toyota’s 3.5L family. This...
Vendor: SCITOO
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SCITOO alternator compatibility view for Highlander and Sienna 3.5L models

SCITOO 180A 12V Alternator for Toyota Highlander 2017-2022 & Sienna 2017-2020 | OE 104211-0971

£223.74
SCITOO alternator compatibility view for Highlander and Sienna 3.5L models
SCITOO 6-groove pulley close-up showing belt engagement
SCITOO 180A front view highlights high-output readiness
SCITOO internal regulator close-up for stable voltage
SCITOO bearing test image showing durability
SCITOO OE reference numbers for easy replacement selection
SCITOO 6-groove pulley detail demonstrates precise alignment
SCITOO alternator fits Highlander and Sienna 3.5L models
SCITOO undergoing durability cycling test for reliability

SCITOO 180A 12V Alternator for Toyota Highlander 2017-2022 & Sienna 2017-2020 | OE 104211-0971

£223.74
Description
Description
x

Overview

Meet the SCITOO high output alternator, crafted as a reliable replacement for Toyota’s 3.5L family. This unit is designed to fit the Highlander from 2017 to 2022 and the Sienna from 2017 to 2020, providing steady power when you need it most. With a 12V system and a robust 180A output, it speaks to modern driving demands while staying compact and lightweight for easier handling.

The alternator features a clockwise rotation and an internal regulator, paired with an internal cooling fan. This combination helps keep temperatures in check during long drives, hot days, and varied electrical loads, all without adding unnecessary bulk to your engine bay.

Key specifications

  • Voltage: 12V
  • Amperage: 180A
  • Rotation: CW
  • Regulator: Internal
  • Fan: Internal
  • Grooves: 6 Grooves with Clutch Pulley
  • Condition: New

What you gain

  • Potentially steadier electrical performance for lights, infotainment, and accessories during daily driving
  • Direct OE replacement option with OE reference 104211-0971 for straightforward selection
  • Precision CNC machined castings and bearings tested to OE-like standards for consistent operation
  • Relatively simple installation that fits common tools and routines

Real-world use and installation tips

In everyday use, you may notice smoother startup power and steadier voltage as loads shift between starts, HVAC, and lighting. The internal cooling helps manage heat during longer commutes or sunny days. When installing, follow a calm, methodical process to minimize rack wear and ensure snug mounting.

  • Disconnect the battery negative terminal before starting
  • Relax the belt tension to the correct level to avoid power loss or bearing stress
  • Tighten all screws securely after confirming proper alignment

Why choose SCITOO

SCITOO is a recognized source for high-output alternators that balance performance, durability, and affordability. Beyond providing a capable replacement, the brand offers technical support to help with installation questions and compatibility concerns.

FAQ

Q: Which vehicles is this SCITOO alternator compatible with?

A: Toyota Highlander 3.5L (2017–2022) and Sienna 3.5L (2017–2020).

Q: What are the key features of this alternator?

A: 12V, 180A output, CW rotation, internal regulator, internal fan, and a 6-groove clutch pulley.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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