16603-31040 Idler Pulley for Toyota Tacoma 4Runner FJ Cruiser Land Cruiser Prado

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

◆ The OEM reference number is 16603-31040. Toyota‘s parts catalog designates this component as “PULLEY SUB-ASSY, IDLER, NO.1” .

◆ The pulley is engineered to OEM standard dimensions, with an outer diameter of approximately 70 mm, an inner bore of 10 mm, and a width of 33 mm .

◆ It is designed for a range of Toyota models including the Tacoma (2.7L), 4Runner (2.7L), FJ Cruiser (4.0L), Land Cruiser Prado, Hiace, and Hilux Surf, covering model years from approximately 2005 onward .

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

◆ Part Number: 16603-31040

◆ Component Type: Idler Pulley / Deflection Pulley (No.1)

◆ Vehicle Make: Toyota

◆ Outer Diameter: Approx. 70 mm

◆ Inner Bore: Approx. 10 mm

◆ Width: Approx. 33 mm

◆ Catalog Designation: PULLEY SUB-ASSY, IDLER, NO.1

◆ Note: Mounting bolt and spacer are typically separate parts and are not included

◆ 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.

◆ Toyota Tacoma (2.7L L4): 2007–2016

◆ Toyota 4Runner (2.7L L4): 2010

◆ Toyota FJ Cruiser (4.0L V6): 2007–2008

◆ Toyota Land Cruiser Prado (GRJ120, TRJ150): 2005 onward

◆ Toyota Hiace (TRH series): 2005 onward

◆ Toyota Hilux Surf (GRN215): 2005

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

Q1: Is this a genuine Toyota part?

A: This listing refers to a replacement part manufactured to meet or exceed OEM standards. The 16603-31040 reference is the original equipment part number. Both genuine Toyota and aftermarket equivalents 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 16603-31040, this replacement will fit. Also confirm your vehicle model and engine variant against the compatibility list above.

Q3: What are the dimensions of this pulley?

A: The pulley measures approximately 70 mm in outer diameter, 10 mm inner bore, and 33 mm in width, matching the original Toyota specification for the 16603-31040 part number .