8pcs 4016819 Fuse Box Relay 12V 20A (SPST), Fits Polaris RZR 570/800/900/1000 2010–2019, Ranger & General 2018–2025, Slingshot 2018; Replaces 4011283; 4016186

4016819 12V 20A Fuse Box Relay — 4-Pin Sealed SPSTPurpose-built plug-in relay for the fuse/relay box on compatible Polaris vehicles. Restores switched power to cooling fan, fuel pump, EPS and lighting circuits.Specs & Cross-Reference12 VDC coil, 20 A contacts, SPST (1 Form A)Sealed micro/ISO footprint (EPXY HFA body)Cross-ref: replaces 4011283; supersedes 4016186 to 4016819Compatibility HighlightsCompatible with 2012–2019 Polaris RZR 570 [Fuse Box] RelayCompatible with 2010–2014 Polaris RZR 800 [Fuse Box] RelayCompatible with 2011–2019 Polaris RZR 900 [Fuse Box] RelayCompatible with 2014–2016 Polaris RZR 1000 [Fuse Box] RelayCompatible with 2018–2025 Polaris Ranger / 2018–2025 Polaris General [Fuse Box] RelayCompatible with 2018 Polaris Slingshot [Fuse Box] RelayHelpful ComplementsIgnition fuse 10A (2434016)Fuseholder cover (4012260) and diagnostic cover (4012170)Confirm by VIN and parts fiche for exact trim/year coverage.

• Build & identifiers — Sealed micro/ISO 4-pin relay; SPST 1 Form A; 12V coil, 20A contacts. Text on fiche: “RELAY-SPST,12V,20A,EPXY,HFA”. Cross-reference: replaces Compatible with Polaris 4011283; 4016186 superseded to 4016819. Common on-body stamps: “303-1AH-S-R1” / “303-1AH-C-R1-U01”.
• Install location & symptoms — Fits fuse/relay box. Typical failure symptoms: no fan, no fuel-pump prime, EPS drop-out, dead horn/lights. Push to latch; verify 4-pin cavity; avoid 5-pin subs. Diagnostic swap with an identical position to confirm.
• RZR legacy years — Compatible with 2012–2019 Polaris RZR 570 [Fuse Box] Relay; Compatible with 2010–2014 Polaris RZR 800 (all trims) [Fuse Box] Relay; Compatible with 2011–2019 Polaris RZR 900 (all trims) [Fuse Box] Relay; Compatible with 2014–2016 Polaris RZR 1000 [Fuse Box] Relay. Coverage drawn from long-running listings referencing 4016819/4011283.
• Extended platforms & cross-sell — Compatible with 2018–2025 Polaris Ranger / 2018–2025 Polaris General [Fuse Box] Relay; Compatible with 2018 Polaris Slingshot [Fuse Box] Relay. Helpful complements for fuse-box refresh: Ignition Fuse 10A (2434016), Fuseholder Cover (4012260), Diagnostic Cover (4012170)