Oil pressure switch which fits fits the following Land Rover models/engines:-
 
Defender 90/110 2.5NA/TD
Defender 90/110 200 & 300Tdi
Discovery 1 200 & 300Tdi
 
Product Info
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CODE: PRC6387
DESC: SWITCH - OIL PRESSURE - D1/DEF 83-06/RRC
BRAND: ALLMAKES