How to Service the Oil Pressure Switch on Mercury Mariner?

Service Engine Oil Pressure (EOP) Switch: Hoist the vehicle in neutral. Take out the RH splash shield bolts (tighten to 9 Nm when re-fitting), unscrew the oil pressure switch connector and unscrew the switch. Re-fit: Reverse the process and use thread sealant.

OEM Mercury Mariner Oil Pressure Switch

Oil Pressure Sender Switch

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

4 Oil Pressure Switches found

View related parts
Mercury Mariner Pressure Switch, Green Part Number: BE8Z-9278-A
$2.27 MSRP: $3.60
You Save: $1.33 (37%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Sending Unit; Switch; Oil Pressure Switch
- Replaces: 1S7Z-9278-AA, SW-6682
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | Base, Convenience, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
View related parts
Mercury Mariner Pressure Switch Part Number: G1CZ-9278-B
$24.30 MSRP: $38.58
You Save: $14.28 (38%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Sending Unit; Oil Pressure Switch
- Replaces: 1U5Z-9278-GA, SW-6376, 6U5Z-9278-G, G1CZ-9278-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Base, Hybrid, Premier | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
View related parts
Mercury Mariner Pressure Switch Part Number: 6U5Z-9278-M
$102.89 MSRP: $172.73
You Save: $69.84 (41%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Gauge Sw; Oil Pressure Switch; Oil Pressure Sending Unit; Oil Gauge Sending Unit
- Manufacturer Note: 3/8" NPTF
- Replaces: 1U5Z-9278-BA, 6U5Z-9278-L, SW-6362
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L GAS
View related parts
Mercury Mariner Pressure Switch Part Number: 6U5Z-9278-N
$127.08 MSRP: $209.09
You Save: $82.01 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch Assembly - Oil Pressure; Engine Oil Pressure Switch; Oil Pressure Sending Unit; Oil Pressure Switch
- Replaces: SW-6356, 6U5Z-9278-J
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS

Mercury Mariner Oil Pressure Switch

Welcome to our website where you can discover high-quality, genuine Mercury Mariner Oil Pressure Switch. We offer an extensive inventory of OEM Mercury Mariner Oil Pressure Switch at affordable prices. We are committed to providing top-rated customer service along with prompt delivery.

Mercury Mariner Oil Pressure Switch Parts and Q&A

Pressure Switch, Green
BE8Z-9278-A
Q: How to Service the Oil Pressure Switch on Mercury Mariner?
A: Service Engine Oil Pressure (EOP) Switch: Hoist the vehicle in neutral. Take out the RH splash shield bolts (tighten to 9 Nm when re-fitting), unscrew the oil pressure switch connector and unscrew the switch. Re-fit: Reverse the process and use thread sealant.