Before I ordered my NTK O2 sensor, I contacted NTK Technical Department. I gave them the VIN:, Date registered, Registration Number. Make, Model, Engine Size and Engine Code.
The O2 that was supposed to fit my 2ltr, was the wrong one. When they checked against their files, I needed the earlier one, OTA7H-3C2 (Stock code 0420) Titanium Lambda even though my car is a 1995 first registered, so can only assume it was a ealier build? The Titania Lambda, which their webcat and other sites say fits mine, is OTA7L-3C4 (0431), which is not correct. So might be worth you contacting them, to check?
NGK Technical Email address:-
technical@ngk.co.ukNGK Webcat
https://www.ngkpartfinder.co.uk/cars_commercial.php?type=LAMBDA%2520SENSORSHope this is of some help?
Addy