Gates T42031 Engine Timing Belt Idler Pulley

Brand	Gates T42031
Contact Surface	Smooth/Backside
Contents	Pulley
Flanged End	No
Inside Diameter	12
Material	Steel
Outside Diameter	66
Width	37.5
Product line	Timing Belt Pulley
Fits	Lexus and Toyota · 98 vehicles

Steel construction. Provides durable support for timing belt routing.

Smooth contact surface. Helps the belt run quietly and efficiently.

Fixed idler design. Works as a direct pulley replacement in the system.

Cross-references Gates T42031, GMB 470-9050 and 9-5259 for the same application. See all 11.

$101.34Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Engine Timing Belt Idler Pulley options

Gates Timing Belt Idler Pulley T42031

The Gates T42031 timing belt idler pulley is a steel, smooth-backside pulley built for engine timing belt service. It is used in interference-engine applications across Lexus and Toyota models, where accurate belt routing and stable pulley operation are critical.

Key Features

Steel construction for timing system durability
Smooth/backside contact surface for belt tracking
12 mm inside diameter
66 mm outside diameter
37.5 mm width
No flanged end
Includes pulley only

Product Details

Gates PowerGrip idler pulleys are offered as fixed idlers or as replacements for tensioner bracket applications, depending on the engine design. The T42031 follows that timing belt pulley format with a smooth running surface and steel body, making it a direct service part for maintaining proper timing belt alignment in Lexus SC430, GX470, GS430, LS430, LX470, LS400, SC400 and Toyota 4Runner, Sequoia, Tundra, and Land Cruiser applications. This part cross-references GMB 470-9050 for the same application.

What It Helps Address

Timing belt noise from a worn idler pulley
Belt tracking issues caused by pulley wear
Rough pulley rotation in the timing system
Service replacement on interference-engine timing repairs
Loss of timing belt stability during engine operation

Installation Notes

Verify pulley dimensions and contact surface before installation.
Inspect the timing belt, tensioner, and related idlers during service.
Use the vehicle’s service procedure for timing belt alignment and torque specifications.
Confirm application by year, make, and model before ordering.

Quality Assurance

Gates PowerGrip timing components are built for timing system service and OE-style fitment across listed Lexus and Toyota applications. Confirmed vehicle coverage includes Fits 2002-2010 Lexus SC430, N/A; Fits 2003-2009 Lexus GX470, N/A; Fits 2003-2009 Toyota 4Runner, N/A; Fits 2001-2009 Toyota Sequoia, N/A; Fits 2000-2009 Toyota Tundra, N/A; and additional Lexus and Toyota timing belt pulley applications through 1990-2010.

This part fits 98 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Fuel Type	Position	Notes
2010	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2009	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2009	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2009	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2009	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2009	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2008	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2008	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2008	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2008	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2008	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2007	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2006	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2005	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2004	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Lexus	GX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Toyota	4Runner	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2003	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Lexus	SC430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2002	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Lexus	GS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Lexus	LS430	4.3L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Toyota	Sequoia	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2001	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Lexus	GS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Lexus	LS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Lexus	SC400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
2000	Toyota	Tundra	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1999	Lexus	GS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1999	Lexus	LS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1999	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1999	Lexus	SC400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1999	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1998	Lexus	GS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1998	Lexus	LS400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1998	Lexus	LX470	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1998	Lexus	SC400	4.0L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1998	Toyota	Land Cruiser	4.7L	V8	GAS	N/A	Compatible with interference engines.; Timing Belt Pulley
1997	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1997	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1996	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1996	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1995	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1995	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1994	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1994	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1993	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1993	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1992	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1992	Lexus	SC400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1991	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
1990	Lexus	LS400	4.0L	V8	GAS	N/A	Timing Belt Pulley
No rows match your filter.

Directly replaces or cross-references 11 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Gates — T42031GMB — 470-90509-5259024-117885259135030F010135025001113503500101350350011FU70994VKM81005