16604-31010 Idler Pulley for Toyota Camry Crown Harrier Land Cruiser Prado 3.5L

1. Product Details

◆ This idler pulley is a direct replacement for the original Toyota unit, designed to guide the serpentine drive belt and maintain proper routing tension.

◆ The OEM reference number is 16604-31010. Toyota’s parts catalog designates this component as “PULLEY SUB-ASSY, IDLER, NO.2” .

◆ The pulley is engineered to OEM standard dimensions, with an outer diameter of 70 mm, a width of 32 mm, and an inner bore of approximately 10.3 mm .

◆ It is primarily designed for the 3.5L V6 engine (2GR-FE), covering the Camry, Crown, Harrier, and Land Cruiser Prado, with applications commonly listed for model years from the mid-2000s onward .

◆ This product is an idler pulley / guide pulley manufactured to meet original quality standards for rotation smoothness, fit, and durability.

2. Product Parameters

◆ Part Number: 16604-31010

◆ Component Type: Idler Pulley / Deflection Guide Pulley

◆ Vehicle Make: Toyota / Lexus

◆ Outer Diameter: 70 mm

◆ Width: 32 mm

◆ Inner Bore (d): 10.3 mm

◆ Weight: Approx. 0.282 kg

◆ Catalog Designation: PULLEY SUB-ASSY, IDLER, NO.2

3. Product Features

◆ OEM Standard Fit: Manufactured to exact original specifications for a direct, hassle-free replacement.

◆ Smooth Rotation: Precision-bearing construction ensures quiet operation and consistent belt guidance .

◆ Durable Construction: Built with materials resistant to heat, friction, and engine bay conditions.

◆ Cost-Effective Solution: An ideal alternative to costly dealership parts without compromising on fit or function.

4. Compatible Vehicles & Years

◆ Toyota Camry (GSV40, 3.5L): 2006–2012

◆ Toyota Crown (GRS200/210, 3.5L): 2010 onward

◆ Toyota Harrier (GSU30/35, 3.5L): 2006–2009

◆ Toyota Land Cruiser Prado (3.5L): various years

◆ Lexus applications with 2GR-FE engine may also be compatible; verify part number before ordering.

◆ Note: Verify against your vehicle‘s original part number and engine code before ordering, as fitment may vary by market and production period.

5. FAQ

Q1: Is this a genuine Toyota part?

A: This listing refers to a replacement part manufactured to meet or exceed OEM standards. The 16604-31010 reference is the original equipment part number. Both genuine Toyota and aftermarket equivalents (such as KOYO PU107013ARMXY1) are available that match the original fit and function .

Q2: How do I confirm if it fits my vehicle?

A: Check your vehicle’s existing part number. If your current idler pulley is stamped with 16604-31010, this replacement will fit. Also confirm your vehicle is equipped with the 3.5L 2GR-FE engine and matches one of the models listed above.

Q3: What are the dimensions of this pulley?

A: The pulley measures 70 mm in outer diameter, 32 mm in width, and has a 10.3 mm inner bore . These dimensions match the original Toyota specification for the 16604-31010 part number.