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Hewitt-Tech Inc.


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"The Original" Secondary Air Injection System Bypass Kit

Home of the "Original" 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. Contact us with any questions regarding the bypass kit, shipping or your trouble codes at 1(844) 307-7671.

The "Original SAIS Bypass Kit". These kits prevent 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. Click image for more details!This is The Original SAIS Bypass Kit. These kits prevent operation of the secondary air injection system at cold start. By preventing the SAIS from operating many of the trouble codes, CEL and Limp mode that are associated with a SAIS failure will not return once cleared. This wired version of the bypass kit installs very easily by tapping directly into the factory IAT/MAF Sensor harness. Detailed installation instructions are easy to follow and include all needed wire colors and an easy to read wire diagram for proper installation. For those that prefer a more profesional and discreet looking installation this easy 4 or 5 wire hookup allows the bypass kit to look like it belongs in the engine compartment while being more affordable than our Plug In Version.

This Plug In version of the Original SAIS Bypass kit offers all the same features and benefits of the Original Wired Version but with super quick and labor saving Plug and Play Installation. All wiring connections except the starter relay connection are accomplished by the Plug and Play harness. Like the wired version, these kits prevent operation of the secondary air injection system at cold start. By preventing the SAIS from operating many of the trouble codes, CEL and Limp mode that are associated with a SAIS failure will not return once cleared. The Plug and Play Harness provides a very clean factory looking installation that allows for the bypass module to still be hidden out of plain sight.