Standard Ignition Engine Oil Pressure Switch P/N:PS661

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$169.99
MPN: PS661
Item Package Quantity: 1
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Standard Ignition Engine Oil Pressure Switch P/N:PS661
Standard Ignition Engine Oil Pressure Switch P/N:PS661
$169.99

Keep an accurate eye on engine oil pressure with the Standard Ignition Engine Oil Pressure Switch (PS661), an oil pressure gauge switch that senses engine oil pressure and reports it to the vehicle's data monitoring system so the gauge or warning indicator reflects actual pressure. It installs as a direct replacement for the 2019-2021 Mazda 3, 2018-2021 Mazda 6, 2019-2021 Mazda CX-3, 2020-2021 Mazda CX-30, 2018-2021 Mazda CX-5, 2016-2021 Mazda CX-9, and 2015 Porsche 918 Spyder — see the Buyer's Guide tab for the full engine-level fitment.

  • Direct replacement: made for OE fit and easy installation.
  • Polyimide film diaphragm: high-temperature polyimide film diaphragms give exceptional cycle durability and resistance to rupture and oil leakage, and are designed to handle rapid pressure pulsations without component damage.
  • Accurate readings: engineered to send a highly accurate, timely oil pressure reading to the vehicle's data monitoring system.
  • Fully tested: each unit is 100% tested on vehicles and with automated equipment that activates the switch, checks for leaks, and stresses the part to confirm specification compliance.

If a faulty switch is the cause of an inaccurate gauge reading or an oil pressure warning that doesn't match real pressure, this robust, high-grade unit restores a proper signal.

Interchange: S4656 · OP7656 · PX9R18541 · PY8V18541B · SH0118541

This part cross-references / interchanges with the following part numbers:

S4656, OP7656, PX9R18541, PY8V18541B, SH0118541, PS661

Frequently Asked Questions

What does the PS661 oil pressure switch do?

It senses engine oil pressure and reports it to the vehicle's data monitoring system, so the gauge or warning indicator reflects actual oil pressure.

Which vehicles does PS661 fit?

It's a direct replacement for the 2019-2021 Mazda 3, 2018-2021 Mazda 6, 2019-2021 CX-3, 2020-2021 CX-30, 2018-2021 CX-5, 2016-2021 CX-9, and 2015 Porsche 918 Spyder. See the Buyer's Guide tab.

What are signs this switch may need replacing?

A false or erratic oil pressure gauge reading, or an oil pressure warning light that doesn't match actual pressure, can be signs. Diagnose the cause first, since low pressure can have other sources.

What part numbers does it interchange with?

It replaces S4656, OP7656, PX9R18541, PY8V18541B, and SH0118541.

Is the switch tested for quality?

Yes—each unit is 100% tested on vehicles and with automated equipment that activates the switch, checks for leaks, and stresses it to confirm specification compliance.