Hello, with my 94 omega b the lambda probe is over! a new one costs over 100 euro, that is a lot of wood for a student! as far as I know is a titanium oxide probe with four cables (red, white, yellow, black) and this is not so easy to get used to! have an offer for one of the 2l astra g, G M Opel /Production Siemens. G M No.90536393 Siemens No.5WK93202 also has four cables and would also have to be a titanium probe! can someone tell me if this would work in mine? must go in sept. to the AU :-(! actually one with 3 cables should go, at four only the mass is led extra? please help!!! fritz