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Dorman 994-157 Vacuum Switching ValveOE Quality 60-Day Returns
Part #: 994-157

Dorman 994-157 Vacuum Switching Valve

97 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Lexus and Toyota, Avalon, Camry, ES350, Highlander, RX350, RX450h, Sienna, Solara, and Venza
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Vacuum Switching Valve for Toyota and Lexus

Dorman 994-157 is a replacement vacuum switching valve built to match the fit and function of the original part on specified vehicles. It uses a factory-style connector for plug-and-play installation and is constructed from metal for a direct replacement on Toyota and Lexus vacuum system applications.

  • Metal construction for OE-style replacement fit
  • Factory-style connector for straightforward electrical connection
  • 3-port design with threaded mounting
  • 2-terminal configuration
  • Includes a purge valve and mount screw

Fitment and Application Details

Compatible with a wide range of Toyota and Lexus models, including Fits 2007-2021 Toyota Camry, N/A; Fits 2013-2018 Lexus ES350, N/A; Fits 2006-2018 Toyota Avalon, N/A; Fits 2007-2018 Toyota Sienna, N/A; Fits 2009-2016 Toyota Venza, N/A; Fits 2007-2015 Lexus RX350, N/A; Fits 2010-2015 Lexus RX450h, N/A; Fits 2008-2013 Toyota Highlander, N/A; and Fits 2007-2008 Toyota Solara, N/A. Additional coverage includes earlier Toyota Camry, Avalon, Solara, and Highlander applications with specific mounting locations noted in the fitment data.

Dorman 994-157 is also cross-referenced to 2M1252 and CP786 for the same application.

What This Valve Helps Address

  • Vacuum switching valve failure that can affect emissions system operation
  • Hard starting or rough running caused by vacuum control issues
  • Check engine light concerns related to purge or vacuum circuit faults
  • Loss of proper vacuum routing in the emission control system
  • Replacement needs for worn or damaged OE-style vacuum valves

Installation Notes and Tips

Verify the mounting style, port layout, and connector match the original valve before installation. This part uses a threaded mounting design with a 6 mm thread diameter and a factory-style connector, which supports direct replacement on listed Toyota and Lexus vehicles. Review the vehicle-specific notes in the fitment data for applications mounted at the fuel rail, charcoal canister, or VVT solenoid location.

Quality Assurance

Dorman manufactures replacement parts to match original fit and function on specified vehicles. Part number 994-157 is built for direct replacement use in emission control vacuum system service.

BrandDorman
Part Number994-157
MaterialMetal
Length75
Port 2 Outside Diameter4
Port 1 Outside Diameter0.25
Port 3 Outside Diameter4
Mounting Hole Quantity1
Terminal Quantity2
Thread Diameter6
Inlet Inside Diameter0.125
Mounting Hole Diameter6.6
Port Quantity3
Package Contents1 purge valve; 1 mount screw
ThreadedYes

This part fits 97 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2021ToyotaCamry3.5LV6N/A
2020ToyotaCamry3.5LV6N/A
2019ToyotaCamry3.5LV6N/A
2018LexusES3503.5LV6N/A
2018ToyotaAvalon3.5LV6N/A
2018ToyotaCamry3.5LV6N/A
2018ToyotaSienna3.5LV6N/A
2017LexusES3503.5LV6N/A
2017ToyotaAvalon3.5LV6N/A
2017ToyotaCamry3.5LV6N/A
2017ToyotaSienna3.5LV6N/A
2016LexusES3503.5LV6N/A
2016ToyotaAvalon3.5LV6N/A
2016ToyotaCamry3.5LV6N/A
2016ToyotaSienna3.5LV6N/A
2016ToyotaVenza3.5LV6N/A
2015LexusES3503.5LV6N/A
2015LexusRX3503.5LV6N/A
2015LexusRX450h3.5LV6N/A
2015ToyotaAvalon3.5LV6N/A
2015ToyotaCamry3.5LV6N/A
2015ToyotaSienna3.5LV6N/A
2015ToyotaVenza3.5LV6N/A
2014LexusES3503.5LV6N/A
2014LexusRX3503.5LV6N/A
2014LexusRX450h3.5LV6N/A
2014ToyotaAvalon3.5LV6N/A
2014ToyotaCamry3.5LV6N/A
2014ToyotaSienna3.5LV6N/A
2014ToyotaVenza3.5LV6N/A
2013LexusES3503.5LV6N/A
2013LexusRX3503.5LV6N/A
2013LexusRX450h3.5LV6N/A
2013ToyotaAvalon3.5LV6N/A
2013ToyotaCamry3.5LV6N/A
2013ToyotaHighlander3.5LV6N/A
2013ToyotaSienna3.5LV6N/A
2013ToyotaVenza3.5LV6N/A
2012LexusRX3503.5LV6N/A
2012LexusRX450h3.5LV6N/A
2012ToyotaAvalon3.5LV6N/A
2012ToyotaCamry3.5LV6N/A
2012ToyotaHighlander3.5LV6N/A
2012ToyotaSienna3.5LV6N/A
2012ToyotaVenza3.5LV6N/A
2011LexusRX3503.5LV6N/A
2011LexusRX450h3.5LV6N/A
2011ToyotaAvalon3.5LV6N/A
2011ToyotaCamry3.5LV6N/A
2011ToyotaHighlander3.5LV6N/A
2011ToyotaSienna3.5LV6N/A
2011ToyotaVenza3.5LV6N/A
2010LexusRX3503.5LV6N/A
2010LexusRX450h3.5LV6N/A
2010ToyotaAvalon3.5LV6N/A
2010ToyotaCamry3.5LV6N/A
2010ToyotaHighlander3.5LV6N/A
2010ToyotaSienna3.5LV6N/A
2010ToyotaVenza3.5LV6N/A
2009LexusRX3503.5LV6N/A
2009ToyotaAvalon3.5LV6N/A
2009ToyotaCamry3.5LV6N/A
2009ToyotaHighlander3.5LV6N/A
2009ToyotaSienna3.5LV6N/A
2009ToyotaVenza3.5LV6N/A
2008LexusRX3503.5LV6N/A
2008ToyotaAvalon3.5LV6N/A
2008ToyotaCamry3.5LV6N/A
2008ToyotaHighlander3.5LV6N/A
2008ToyotaSienna3.5LV6N/A
2008ToyotaSolara3.3LV6N/A
2007LexusRX3503.5LV6N/A
2007ToyotaAvalon3.5LV6N/A
2007ToyotaCamry3.5LV6N/A
2007ToyotaHighlander3.3LV6GASN/AMounted at Fuel Rail; No. 2
2007ToyotaSienna3.5LV6N/A
2007ToyotaSolara3.3LV6N/A
2006ToyotaAvalon3.5LV6N/A
2006ToyotaCamry3.0LV6N/AMounted at Charcoal Canister
2006ToyotaCamry3.3LV6N/AMounted at Fuel Rail; No. 2
2006ToyotaHighlander3.3LV6GASN/AMounted at Fuel Rail; No. 2
2006ToyotaSolara3.3LV6N/AMounted at Fuel Rail; No. 2
2005ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve
2005ToyotaCamry3.0LV6N/AMounted at Charcoal Canister
2005ToyotaCamry3.3LV6N/AMounted at Fuel Rail; No. 2
2005ToyotaHighlander3.3LV6N/AEngine Variable Valve Timing (VVT) Solenoid.
2005ToyotaSolara3.3LV6N/AMounted at Fuel Rail; No. 2
2004ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve
2004ToyotaCamry3.0LV6N/AMounted at Fuel Rail; No. 2
2004ToyotaCamry3.3LV6N/AMounted at Fuel Rail; No. 2
2004ToyotaHighlander3.3LV6N/AEngine Variable Valve Timing (VVT) Solenoid.
2004ToyotaSolara3.3LV6N/AMounted at Fuel Rail; No. 2
2003ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve
2003ToyotaCamry3.0LV6N/AMounted at Fuel Rail; No. 2
2002ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve
2001ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve
2000ToyotaAvalonN/AMounted at Fuel Rail; No. 2; Vacuum Switching Valve

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

This part directly replaces or is cross-referenced with the following part numbers:

2M12529091012204CP786CP875

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

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