ABS Wheel Speed Sensor Front R / L 99-03 BMW E39 528i, 540i, M5 In order to avoid return hassle and save yours and our time, you must cross-check indicated reference part numbers against those found on your old unit. Do not rely on vehicles compatibility list, which is presented for the reference purpose and shouldn't be your guide to determine compatibility. If you are unsure, you may call local dealership (auto parts dept.) to obtain correct part numbers or ask your mechanic. If you would like us to help you, please contact us and provide your vehicle's detailed info such as: Make/Model/Year/Engine/Full VIN# and we will do our best to find compatibility. PART REFERENCE NUMBERS: BMW: STANDARD MOTOR: 34526756375 34521165534 35520025723 ALS442 AIRTEX/WELLS: BECK/ARNLEY: 5S10529 SU11982 0844047 FLENNOR DORMAN: FSE51492 970119 *Please cross-check indicated OEM reference codes against those found on your current unit. You may call local dealership (auto parts dept.) to obtain correct numbers. COMPATIBLE VEHICLES: * Fits front right or left side (indicated price is for 1 sensor). Models presented for reference purpose only! Year: Make: Model: Chassis: 2001-2003 BMW 525i E39 1999-2000 BMW 528i E39 2000 BMW 528it E39 2001-2003 BMW 530i E39 1999-2003 BMW 540i E39 2000-2003 BMW M5 E39