Oil pressure switches for all 1300 & 1600 engined cars are the same as for a Mini. Original part numbers are GPS101 superceded by GPS126 then GPS131 and finally GPS133.
For the 2.0 Petrol & Diesel engines the original part number is GPS126, superceded by GPS131 and GPS133.
Original part numbers for those used on a Turbo petrol engine or 1600 engines with electric fuel pumps are GPS129, superceded by GPS132 then GPS134 and finally GPS136. The intermotor part number is 50670.
For the 2.0 Petrol & Diesel engines the original part number is GPS126, superceded by GPS131 and GPS133.
Original part numbers for those used on a Turbo petrol engine or 1600 engines with electric fuel pumps are GPS129, superceded by GPS132 then GPS134 and finally GPS136. The intermotor part number is 50670.