This is an extract from a post I did back in 2017:
Removed fuel filter and tucked fuel lines out of the way. Disconnected OEM Sensor elec connector, then from underneath used an open ended spanner and removed OEM Sensor.
This is when I installed the VDO oil pressure gauge and T piece (2017). Can not remember if it is required to remove the fuel filter + brkt just for the changing out the sensor. But not much work to move filter out of the way.
Not sure if u are thinking of installing an oil pressure gauge, just be aware that some Tee adaptors on eBay are too long. This is what I used:
https://www.gauge-shop.com.au/produc...40415205195941
Attached a couple of post FYI:
My install sensor/T piece/VDO sender
http://www.nissanpatrol.com.au/forum...DO-quot-T-quot
Mod to starter top bolt cable bracket so to fit T adaptor
http://www.nissanpatrol.com.au/forum...or-Bracket-Mod