Mass Air Flow Sensor / Meter 01-05 BMW E46 330Ci, 530i, E53 X5, Z3 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: SIEMENS/VDO: 13621438871 13 62 1 438 871 13627567451 1362 7567 451 5WK96132 5WK96132Z AIRTEX/WELLS: HELLA: 5S2608 SU5386 8ET0091142341 8ET0091142-341 CARDONE: 7410055 74-10055 *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: * Models presented for reference purpose only! MAKE: MODEL: YEAR: BMW 330CI (2001 - 2003) BMW 330I (2001 - 2003) BMW 330XI (2001 - 2005) BMW 530I (2001 - 2003) BMW X5 (2001 - 2006) BMW Z3 (2001 - 2002)