How to Service the Engine Oil Pressure Switch on Mercury Mariner?

A hoist and neutral gear position the vehicle requires for oil pressure switch servicing. The service process starts by taking off the pin-type retainer and five bolts as well as the right-hand splash shield and requires tight bolts at 9 Nm (80 lb-in) for reinstallation. The oil pressure switch removal process begins by detaching its electrical connector before taking out the switch unit while torquing the new switch to 15 Nm (11 lb-ft). The removal process should be reversed before reinstallation while applying thread sealant to the oil pressure switch's threaded sections.

OEM Mercury Mariner Oil Pressure Switch

Oil Pressure Sender Switch

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4 Oil Pressure Switches found

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Mercury Mariner Pressure Switch, Green Part Number: BE8Z-9278-A
$16.03 MSRP: $25.45
You Save: $9.42 (38%)
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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
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Mercury Mariner Pressure Switch Part Number: G1CZ-9278-B
$24.73 MSRP: $39.27
You Save: $14.54 (38%)
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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
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Mercury Mariner Pressure Switch Part Number: 6U5Z-9278-M
$102.89 MSRP: $172.73
You Save: $69.84 (41%)
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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
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Mercury Mariner Pressure Switch Part Number: 6U5Z-9278-N
$129.29 MSRP: $212.73
You Save: $83.44 (40%)
Ships in 1-2 Business Days
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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

OEM Oil Pressure Switch boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury's official factory standards. These steps remove flaws and inconsistencies. So you can get Oil Pressure Switch with long life and a perfect fit. Come to our website and find genuine Mercury Mariner parts. We keep a wide inventory of OEM Mariner parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

The Oil Pressure Switch is one of the most important that magnify the reliability and performance of Mercury Mariner vehicles. This is an important gadget that checks the pressure of the oil, and when the pressure is out of an acceptable limit, there is an indication to the driver and this protects the engine together with other sub systems within it from being damaged. The Oil Pressure Switch is well known for its sturdiness and efficiency and cuts a great figure allowing for longer and better performance of the engine regardless of the type of Mariner. This feature of compatibility with the different model of Mercury Mariner proves its beneficial versatility of use to ensure the efficiency and safety of the engine used. The Oil Pressure Switch is built with sophisticated parameters as regarding to sensitivity and response time so as to increase the accuracy and promptness of sensing pressure fluctuations, which also consolidates the importance of the oil pressure switch for the Mercury Mariner's oil pressure circuitry. For instance, the Oil Pressure Switch enjoys relative popularity in the automotive market because of high durability and performance, not mentioning the psychological factor when a driver, who is behind the wheel, does not worry about possible troubles. The Mercury Mariner has always been an innovative watercraft, with features such as the pull-drift steering compensation and hybrid technology being part of the car's heritage; the Oil Pressure Switch fits in this chain by making sure that the car's engine is running at its optimal. In totality, Oil Pressure Switch is a must have part of the Mercury Mariner series vehicles if the performance and safety of these cars is to be improved hence should be in the possession of any Mariner car owner.

Mercury Mariner Oil Pressure Switch Parts and Q&A

Pressure Switch
6U5Z-9278-M
Q: How to Service the Engine Oil Pressure Switch on Mercury Mariner?
A:
A hoist and neutral gear position the vehicle requires for oil pressure switch servicing. The service process starts by taking off the pin-type retainer and five bolts as well as the right-hand splash shield and requires tight bolts at 9 Nm (80 lb-in) for reinstallation. The oil pressure switch removal process begins by detaching its electrical connector before taking out the switch unit while torquing the new switch to 15 Nm (11 lb-ft). The removal process should be reversed before reinstallation while applying thread sealant to the oil pressure switch's threaded sections.