4Pcs O2 Oxygen Sensor Upstream & Downstream For BMW 335I 128I 323I 528I X3 X5 Z4

Manufacturer Part Number: 234-4506 Interchange Part Number 15127 75-3680 SG1273 Position Please Check the Notes on Compatibility Wire Quantity 4 Wire Harness Length 28.35 Please check the plug & fitment notes & filter system & description for accurate information.Manufactured to the highest standards Our oxygen sensors are durable, ensuring long-term stable performance