TROFOM Knock Sensor For MAZDA 3 BK 1.4 1.6 2.0 2.3 ZJ01-18-921 E1T50371 ZJ0118921 E001T50471 V32-72-0025 0907019 SEB1669 1.Please Must Make Sure Your Original Part Number Same One Oem Number Of Our Product Link. 2.Please Must Make Sure Your Car Type Same One Type Of Our Product Link. 3.Please Must Check Our Product Photos In The link If Same Your Old Part. 4.Please Make The Order After You Confirm Three Points As Top. If You Have Any Questions.Please Don't Hesitate Let Us To Know. We Must Confirm The Goods 100% Fit Your Car. Compatible with OEM numbers:ZJ01-18-921,E1T50371,ZJ0118921,E001T50471,V32-72-0025,0907019,SEB1669