MG6 1.8T Oxygen O2 Sensor (Lambda) - 10000725 / MHK90076C - Front & Rear
This is a Genuine Bosch Lambda Sensor for the MG 1.8T (Turbo) models - fits both front and rear (these use the same sensor, but the wiring length is all that differs).
MG part number 1000075
Bosch part number 0 258 006 918
Alternative part number MHK90076C
Wiring - 4 wire