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Gen II - Our Gen II kits emulate the operation of the SAIS and ECM will read as Ready/Completed. It also eliminates all trouble codes dealing with the SAIS with the exception of the pressure sensor. Installs at the Air Injection Driver and Air Switching Valves. This is our recommended solution because it is the most comprehensive kit we offer.

Gen I - Our Gen I kits will prevent the SAIS from operating on a cold start and ECM will read as Not Ready/Incomplete. With this unit, all of the SAIS parts/components will need to remain in place for the computer to see continuity to them. Installs at Mass Air Flow sensor and Engine Coolant Temperature sensor. Also, the starter relay wire will need to be run from the bypass module to a terminal inside the fuse box.

Gen II Gen I
  • Covers both mechanical and Electrical SAIS error codes
  • Compatible with Toyota's current ECM Computer flash
  • Compatible with Flex Fuel Modes
  • Clears permanent codes
  • Covers only mechanical SAIS error codes*

*Kit Addons needed for each the following electrical codes: Codes P0418 & P0419 Each Require A Pump Proxy Pack, Codes P0412 & P0415 Each Require Valve Solenoid Pack

*When placing your order online be sure to select your Model/Year/Engine Size on the product page to ensure you receive correct kit

Please note, if there is any damage to the pressure sensors, Kit Addons would be needed for both Gen I and Gen II Kits. Contact us if you have any additional questions (844) 307-7671 or

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2005 - 2007 Plug & Play SAIS Bypass Kit
55 Review(s)
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 ma
$259.00 $190.00

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2008 - 2014 Plug & Play SAIS Bypass Kit
36 Review(s)
Plug and Play Bypass Kit Covers 2008-2012 and select 13 and 14 models vehicles. Can prevent many of the trouble codes caused by a mechanical failure of the SAIS System.
$349.00 $230.00

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2005 - 2007 Wired SAIS Bypass Kit
15 Review(s)
Wired SAIS Bypass Kit. Wires directly into MAF sensor wiring. Recommended for Professional Installation Only! Installation error not covered under warranty.
$169.00 $140.00

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Gen-II SAIS Bypass Kit
24 Review(s)
The best solution available. Emulates the entire system by replacing the air injection control driver(s). Require good pressure sensors or PSO but no other kit add-ons are needed for codes like the GenI units.
$450.00 $400.00

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Gen-II SAIS Bypass Kit (3-Valve)
The GenII unit for those 4.7L vehicles with the SAIS located completely underneath the intake manifold. Requires 3 wire tap connections to be made at the ECM.
$450.00 $400.00

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2005 - 2007 Plug & Play Bypass SAIS Kit w/ PPP
4 Review(s)
Plug and Play Combo Kit includes the Hewitt-Tech SAIS Bypass Plug and Play Module and a SAIS Pump Proxy Pack. Click here for more details!
$404.00 $335.00

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