How to Service the Oil Pressure Switch on Mercury Grand Marquis?

A proper service of the oil pressure switch starts with disconnecting the battery ground cable. Next, support the vehicle with an adequate lift. Start by disconnecting the electrical connector from the oil pressure switch before removing the switch. Installation of the new switch should be performed by following the reversal of previous removal steps.

OEM Mercury Grand Marquis Oil Pressure Switch

Oil Pressure Sender Switch

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3 Oil Pressure Switches found

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Mercury Grand Marquis Oil Pressure Sensor
Part Number: GC3Z-9278-B
$20.37 MSRP: $31.53
You Save: $11.16 (36%)
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Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Gauge Sw; Pressure Switch; Oil Pressure Switch; Pressure Sensor; Sending Unit; Switch Assembly; Oil Gauge
- Replaces: 6U5Z-9278-D, 1U5Z-9278-DA, GC3Z-9278-A, SW-6357
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2011 Mercury Grand Marquis | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Oil Pressure Sending Unit
Part Number: D4AZ-9278-A
$45.08 MSRP: $72.73
You Save: $27.65 (39%)
ADD TO CART
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Gauge Sw; Oil Pressure Switch; Oil Gauge; Oil Gauge Sending Unit
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1984-1991 Mercury Grand Marquis | Base, Colony Park, GS, LS | 8 Cyl 5.0 L GAS
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Mercury Grand Marquis Oil Pressure Switch
Part Number: E9SZ-9278-A
$12.22 MSRP: $18.91
You Save: $6.69 (36%)
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Gauge Sw; Oil Pressure Sending Unit; Oil Gauge Sending Unit
- Replaces: F4TZ-9278-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1992-1999 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS

Mercury Grand Marquis Oil Pressure Switch

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Mercury Grand Marquis Oil Pressure Switch Parts Questions & Experts Answers

Oil Pressure Sensor
GC3Z-9278-B
Q: How to Service the Oil Pressure Switch on Mercury Grand Marquis?
A: A proper service of the oil pressure switch starts with disconnecting the battery ground cable. Next, support the vehicle with an adequate lift. Start by disconnecting the electrical connector from the oil pressure switch before removing the switch. Installation of the new switch should be performed by following the reversal of previous removal steps.