Standard Ignition Automatic Transmission Control Solenoid P/N:TCS40
Help your automatic transmission move fluid pressure the way it was designed with the Standard Ignition Transmission Control Solenoid TCS394. It is a direct-fit replacement for the 2003-2010 Mazda 6, the 2007-2012 Mazda CX-7 and the 2007-2012 Mazda CX-9. See the Buyer's Guide tab for engine details.
This automatic transmission control solenoid is an electrically operated valve. When the transmission's control module energizes it, the solenoid blocks or vents fluid pressure in the transmission's hydraulic circuit.
As a global manufacturer, Standard Ignition maintains quality control throughout the manufacturing process.
Signs a transmission control solenoid may need replacing include:
These symptoms can have other causes, so diagnose the transmission before replacing the solenoid.
Interchange: TCS317 · TCS937 · AW01211DX
This part cross-references / interchanges with the following part numbers:
Which vehicles does the Standard Ignition TCS394 fit?
It is listed for the 2003-2010 Mazda 6, 2007-2012 Mazda CX-7 and 2007-2012 Mazda CX-9. See the Buyer's Guide tab for engine details.
What does a transmission control solenoid do?
It is an electrically operated valve. When the transmission's control module commands it, its precision-ground pintle moves to block or vent fluid pressure.
What are signs this solenoid may need replacing?
Harsh, delayed or erratic shifts, slipping, or a transmission warning light or trouble code may be signs. These can have other causes, so diagnose the transmission first.
Does the TCS394 have a filter screen?
Yes. It has a stainless steel filter screen that helps keep contamination away from the solenoid's valve components.
What part numbers does the TCS394 interchange with?
It interchanges with TCS317, TCS937 and AW01211DX.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.