Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Mazda 5 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Vehicle Speed Sensor: Service and Repair
VEHICLE SPEED SENSOR (VSS) REMOVAL/INSTALLATION (FN4A-EL)
Caution:
^ Water or foreign material entering the connector can cause a poor connection or corrosion. Be sure not to drop water or foreign material on the connector when disconnecting it.
^ If foreign materials are stuck to the VSS, disturbance by magnetic flux can cause sensor output to be abnormal and thereby negatively affect control. Make sure that foreign materials such as iron filings are not stuck to the VSS during installation.
1. Remove the battery duct and battery cover.
2. Disconnect the negative battery cable.
3. Remove the under cover.
4. Disconnect the VSS connector.
5. Remove the VSS.
6. Apply ATF to a new O-ring and install it on a new VSS.
7. Install the VSS.
Tightening torque
8-11 Nm (82-112 kgf.cm, 71-97 in.lbf)
8. Connect the VSS connector.
9. Install the under cover.
10. Connect the negative battery cable.
11. Install the battery duct and battery cover.
Caution:
^ Water or foreign material entering the connector can cause a poor connection or corrosion. Be sure not to drop water or foreign material on the connector when disconnecting it.
^ If foreign materials are stuck to the VSS, disturbance by magnetic flux can cause sensor output to be abnormal and thereby negatively affect control. Make sure that foreign materials such as iron filings are not stuck to the VSS during installation.
1. Remove the battery duct and battery cover.
2. Disconnect the negative battery cable.
3. Remove the under cover.
4. Disconnect the VSS connector.
5. Remove the VSS.
6. Apply ATF to a new O-ring and install it on a new VSS.
7. Install the VSS.
Tightening torque
8-11 Nm (82-112 kgf.cm, 71-97 in.lbf)
8. Connect the VSS connector.
9. Install the under cover.
10. Connect the negative battery cable.
11. Install the battery duct and battery cover.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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