12V 20A 5-Pin Automotive Relay - Fuse Box Plug-in - Replaces OE 5M5Z-14N089-BA, 1S4Z-14N089-AA, F4SZ-14N089-A, F5TZ-14N089-B

OE Reference & Key SpecsOE number: 5M5Z-14N089-BA (also listed as 5M5Z14N089BA)Rated: 20A; 5-terminal / 5-blade plug-in relay (commonly used in engine-compartment fuse/relay boxes)Catalog replacement OE references: 1S4Z-14N089-AA, 4F1Z-14N089-AA, F4SZ-14N089-A, XS4Z-14N089-AA, F5TZ-14N089-BWhat it does (function depends on cavity/slot)This is a multi-purpose relay used in vehicle fuse/relay panels. Depending on the cavity, it may control circuits such as accessory power, horn, wipers, fuel pump, or starter control. Always use the fuse-box legend or service manual to identify the correct relay position.Common symptoms (may indicate a failing relay)Intermittent or no operation of the circuit controlled by that relay (for example: horn/wipers/accessories not working)Clicking issues, stuck contacts, or inconsistent power to the connected componentFitment check (important)Confirm fitment by matching the OE number on your original relay and verifying the 5-terminal layout, amp rating, and the relay position shown in your owner’s manual/service manual. If your vehicle uses a different 14N089 suffix (AA/BA/CA/EA), match the exact part number.Install notesTurn ignition OFF and disconnect the negative battery cable before servicing electrical components.Pull straight up to remove; press fully to seat the new relay.

• SPEC: 12V automotive relay (confirm system voltage), 20A rated; 5-terminal/5-blade plug-in style for fuse/relay boxes. OE reference: 5M5Z-14N089-BA (base no. 12B577B; also listed as 5M5Z14N089BA). Replaces: 1S4Z-14N089-AA, 4F1Z-14N089-AA, F4SZ-14N089-A, XS4Z-14N089-AA, F5TZ-14N089-B. Commonly cataloged as horn/sentinel/wiper relay; some catalogs also list this relay for accessory power/fuel pump/starter positions—function depends on the fuse-box cavity.
• INSTALL/NOTES: Usually found in the engine compartment fuse/relay box (verify exact cavity by owner manual). Turn ignition OFF and disconnect the negative battery cable before servicing. Match the molded OE number and confirm 5-terminal layout + 20A rating before insertion. If diagnosing an intermittent issue, you can swap with another identical relay in the same box (same OE number) as a quick check. Do not force-fit different terminal counts or higher-amp relays.
• Compatible with 2013-2018 Ford C-Max Engine Compartment Fuse/Relay Box Relay; Compatible with 2003-2011 Ford Crown Victoria Engine Compartment Fuse/Relay Box Relay; Compatible with 2004-2019 Ford E-150 Engine Compartment Fuse/Relay Box Relay; Compatible with 2004-2019 Ford E-250 Engine Compartment Fuse/Relay Box Relay; Compatible with 2004-2019 Ford E-350/E-350 Super Duty Engine Compartment Fuse/Relay Box Relay; Compatible with 2021-2024 Ford E-350/E-350 Super Duty Engine Compartment Fuse/Relay Box Relay
• Compatible with 2004-2019 Ford E-450 Super Duty Engine Compartment Fuse/Relay Box Relay; Compatible with 2007-2010 Ford Edge Engine Compartment Fuse/Relay Box Relay; Compatible with 2001-2019 Ford Escape Engine Compartment Fuse/Relay Box Relay; Compatible with 2000-2005 Ford Excursion Engine Compartment Fuse/Relay Box Relay; Compatible with 1999-2017 Ford Expedition Engine Compartment Fuse/Relay Box Relay
• VERIFY BEFORE BUY: Similar relays can share the same 14N089 base but differ by suffix (for example: 5M5Z-14N089-AA/BA/CA/EA). Match the exact OE number on your original relay and the fuse-box diagram; do not substitute different terminal counts.