B5254S engines have only 2 types of Maf sensors. Jetronic have one type while m4.3 & m4.4 share the same Maf. Bosch 0 280 217 107 is for m4.3 & m4.4 management and it is not interchangeable with jetronic management. While m4.3 & m4.4 use the whole maf assembly...jetronic use just an ins...

If your replacement MAF is NOT oem Bosch,it will not work.The fact is that the car will run better with an old one. Disconnect the MAF and start the engine.If it runs better than you still have MAF problem. Note that Maf sensors for Jetronic & later Motronic system are NOT compatible,neither th...