Knock / Detonation Sensor FOR 97-99 Subaru Forester, Impreza, Legacy 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: OEM: AIRTEX / WELLS: 22060AA061 22060-AA061 KS-SB-AA061 KSSBAA061 SU4989 5S2295 STANDARD MOTOR: AC DELCO: KS96 2131826 213-1826 BOSCH: CARQUEST: 65017 716669 71-6669 NIEHOFF: DELPHI: WA1752 AS10116 AS10116-11B1 KEMPARTS: BECK/ARNLEY: 144-722 1580919 *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! Year: Make: Model: 1997-1998 Subaru Impreza 1997-1998 Subaru Legacy 1998 Subaru Forester 1999 Subaru Legacy 2.5H4