Can’t find out where is location of crankshaft sensor and oxygen sensor on NB 1,8l mark 2
If it’s a vvt, will have a lumpy bit of metal gubbins on the o/s cam cover with an oil pipe leading to the back of the engine, crankshaft sensor is n/s of the crankshaft pulley, wires for it thread precariously horizontal and then to the loom on the n/s of the engine. Again if it is a vvt there are two oxygen sensors one in front and the other behind the catalytic convertor. In my limited experience if you should be thinking of replacing them you’ll be saving yourself and awful lot of time and money by getting OEM sensors. Hope that helps.