Kwiksen 2PCS Heated Oxygen O2 Sensor 234-4621 234-4122 Upstream & Downstream for 2001 2002 2003 Honda Civic 1.7L D17A2 Engine PART NUMBER: 234-4621 x1, 234-4122 x1 Length 234-4621:560mm (22.05 inch), 234-4122: 550mm(21.7 inch) Only fitsD17A2 engine Sensor 1 and Sensor 2 for 2001-2003 Honda Civic 1.7L Only D17A2 Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase