Home of the Hewitt-Tech Toyota/Lexus Secondary Air Injection System Bypass Kits. These kits offer a cost effective solution for the failure prone Secondary Air Injection Systems found on certain Toyota truck and SUVs. The bypass kit can prevent many of the trouble codes caused by a mechanical failure of the secondary air pump or a secondary air valve saving you as much as a $2000-$4000 on a repair bill, turn off your CEL and keep the vehicle out of limp mode. The kit is not a fix all solution so check our codes section and installation instructions for more info on how the kit can help you. You can also use the Contact Us page to contact us with any questions regarding the bypass kit, shipping or your trouble codes.

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Featured Products

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SKU: V36H

$259.00

2005 - 2007 Plug & Play SAIS Bypass Kit

(5.0 on 41)

The Hewitt-Tech SAIS Bypass Kit Plug and Play prevents operation of the SAIS at cold start thus letting you clear your related trouble codes, the CEL and Limp mode and installation made easy. Click here for more details!

Select Your Vehicle, Year, Engine:

Tundra, 2005-2007, 4.7L (2UZ-FE)Tundra, 2007, 5.7L (3UR-FE)Tundra, 2007, 4.0L 1GR-FE (V3640H)Sequoia, 2005-2007, 4.7L (2UZ-FE)Sequoia, 2007, 5.7L (3UR-FE)4Runner, 2005-2007, 4.7L (2UZ-FE)Lexus LX470, 2006-2007, 4.7L (2UZ-FE)Lexus GX470, 2005-2007, 4.7L (2UZ-FE)LandCruiser, 2006-2007, 4.7L (2UZ-FE)Tacoma, 2007, 2.7L (2TR-FE) (Add $90.00)Tacoma, 2005-2006, 2.7l (2TR-FE)Hilux, 2005-2007, 2.7L (2TR-FE)

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SKU: V54H

$349.00

2008 - 2014 Plug & Play SAIS Bypass Kit

(5.0 on 26)

Plug and Play Bypass Kit Covers 2008-2012 and select 13', 14' vehicles. Can prevent many of the trouble codes caused by a mechanical failure of the SAIS System.

Select Your Vehicle, Year, Engine:

Tundra, 2008-2009, 4.7L (2UZ-FE)Tundra, 2008-2010, 4.0L (1GR-FE)Tundra, 2008-2013, 5.7L (3UR-FE, non FlexFuel only)Tundra, 2010-2014, 4.6L (1UR-FE)Tundra, 2011-2012, 4.0L (1GR-FE) - V5440HBTTacoma, 2012, 4.0L (1GR-FE)Tacoma, 2008-2009, 2.7L (2TR-FE)Sequoia, 2010-2014, 4.6L (1UR-FE)Sequoia, 2008-2013, 5.7L (3UR-FE, non FlexFuel only)Sequoia, 2008-2009, 4.7L (2UZ-FE)4Runner, 2008-2009, 4.7L (2UZ-FE)4Runner, 2010-2011, 2.7L (2TR-FE)LandCruiser, 2008-2012, 5.7L (3UR-FE)Lexus LX570, 2008-2012, 5.7L (3UR-FE)Lexus GX460, 2010-2014, 4.6L (1UR-FE)Lexus GX470, 2008-2009, 4.7L (2UZ-FE)FJ Cruiser, 2012, 4.0L (1GR-FE) - V5440HBLandcruiser Prado, 2009-2012, 4.0L (1GR-FE) - V5440HBT

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SKU: V36W

$168.00

2005 - 2007 Wired SAIS Bypass Kit

(5.0 on 13)

The Hewitt-Tech Wired SAIS Bypass Kit prevents operation of the SAIS at cold start thus letting you clear your related trouble codes, the CEL and Limp mode. Installs by wiring directly into the IAT/MAF Sensor harness. Professional Installation Recommended

Select Your Vehicle, Year, Engine:

Tundra, 2007, 4.0L (1GR-FE)Tundra, 2007, 5.7L (3UR-FE)Tundra, 2005-2006, 4.7L (2UZ-FE)Tundra, 2007, 4.7L (2UZ-FE)Tacoma, 2005-2006, 2.7L (2TR-FE)Sequoia, 2005-2007, 4.7L (2UZ-FE)Sequoia, 2007, 5.7L (3UR-FE)4Runner, 2005-2007, 4.7L (2UZ-FE)LandCruiser, 2006-2007, 4.7L (2UZ-FE)Lexus, LX470, 2006-2007, 4.7L (2UZ-FE)Lexus, GX470, 2005-2007, 4.7L (2UZ-FE)

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SKU: GenII

$0.00

Next Gen. Bypass Kits - Coming Soon!

Our Next Gen. Bypass Kits are a huge leap forward compared to all previous bypass kits. Complete Plug and Play, no triggering, no relay connection, just install and clear ALL your SAIS codes.