2PCS 25230-79971 A/C Relay 12V 4-Pin, Replaces 25230-79981/25230-9B900; Compatible with Nissan Pathfinder 1996-2004, Maxima 1995-2003, Sentra 1995-1999; Compatible with Infiniti I30/I35, QX4

25230-79971 A/C Relay — 12V 4-Pin (Replaces 25230-79981 / 25230-9B900)This 12V, 4-pin micro relay (Common Blue) controls the A/C clutch on many vehicles and is also used in other circuits on some applications. Always confirm by VIN and service diagram.Key Specs & InterchangeType: SPST, 4-pin micro relay; EPC name: “Relay-Air Conditioner”.Approx. housing size: 1.9 × 1.4 × 1.2 in.Supersession: 25230-79971 → 25230-79981; dealer catalogs also list 25230-9B900.Common Symptoms AddressedA/C compressor not engaging or intermittent cooling (when this relay controls the A/C circuit on the vehicle).Install & Location NotesFits into the engine-room fuse/relay box or passenger-side panel depending on model; match the 4-pin footprint and part number.Disconnect the battery, pull the old relay straight out, and seat the replacement fully.Fitment Summary (North America)Compatible with Nissan 200SX (1995–1997), 240SX (1995–1998), 300ZX (1995–1996), Altima (1993–1997), Maxima (1995–2003), Pathfinder (1996–2004), Sentra (1995–1999), Stanza (1993–1997).Compatible with Infiniti G20 (1999–2002), I30 (1996–2001), I35 (2002–2004), J30 (1993–1997), M45 (2003–2004), Q45 (1993–2005), QX4 (1997–2003).Note: On some models this relay also appears in lighting or accessory circuits; verify the exact position by VIN and diagram before ordering.

• SPEC & OEs — 12VDC, 4-pin micro relay (Common Blue); EPC description: “Relay-Air Conditioner”; replaces OE 25230-79971 with supersession to 25230-79981; also interchange OE 25230-9B900 in dealer catalogs. Approx. size 1.9 × 1.4 × 1.2 in. Restores A/C clutch control on applicable vehicles.
• INSTALL & LOCATION — Disconnect battery; pull the blue 4-pin relay from the engine-room fuse/relay box or passenger-side panel (location varies by model). Examples from public sources: one 2000 sedan platform has engine-room and under-dash relay boxes; a 2001 midsize pickup places the A/C relay under-hood passenger side; an executive sedan EPC lists the relay on the passenger side. Match 4-pin footprint and swap; verify with service diagnostics.
• COMPATIBILITY — Compatible with 1995 Nissan 200SX A/C Relay; Compatible with 1996 Nissan 200SX A/C Relay; Compatible with 1997 Nissan 200SX A/C Relay; Compatible with 1995 Nissan 240SX A/C Relay; Compatible with 1996 Nissan 240SX A/C Relay; Compatible with 1997 Nissan 240SX A/C Relay; Compatible with 1998 Nissan 240SX A/C Relay; Compatible with 1995 Nissan 300ZX A/C Relay; Compatible with 1996 Nissan 300ZX A/C Relay; Compatible with 1993 Nissan Altima A/C Relay; Compatible with 1994 Nissan Altima A/C Relay; Compatible with 1995 Nissan Altima A/C Relay; Compatible with 1996 Nissan Altima A/C Relay; Compatible with 1997 Nissan Altima A/C Relay.
• COMPATIBILITY — Compatible with 1995 Nissan Maxima A/C Relay; Compatible with 1996 Nissan Maxima A/C Relay; Compatible with 1997 Nissan Maxima A/C Relay; Compatible with 1998 Nissan Maxima A/C Relay; Compatible with 1999 Nissan Maxima A/C Relay; Compatible with 2000 Nissan Maxima A/C Relay; Compatible with 2001 Nissan Maxima A/C Relay; Compatible with 2002 Nissan Maxima A/C Relay; Compatible with 2003 Nissan Maxima A/C Relay; Compatible with 1996 Nissan Pathfinder A/C Relay; Compatible with 1997 Nissan Pathfinder A/C Relay; Compatible with 1998 Nissan Pathfinder A/C Relay; Compatible with 1999 Nissan Pathfinder A/C Relay; Compatible with 2000 Nissan Pathfinder A/C Relay.
• COMPATIBILITY — Compatible with 2001 Nissan Pathfinder A/C Relay; Compatible with 2002 Nissan Pathfinder A/C Relay; Compatible with 2003 Nissan Pathfinder A/C Relay; Compatible with 2004 Nissan Pathfinder A/C Relay; Compatible with 1995 Nissan Sentra A/C Relay; Compatible with 1996 Nissan Sentra A/C Relay; Compatible with 1997 Nissan Sentra A/C Relay; Compatible with 1998 Nissan Sentra A/C Relay; Compatible with 1999 Nissan Sentra A/C Relay; Compatible with 1993 Nissan Stanza A/C Relay; Compatible with 1994 Nissan Stanza A/C Relay; Compatible with 1995 Nissan Stanza A/C Relay; Compatible with 1996 Nissan Stanza A/C Relay; Compatible with 1997 Nissan Stanza A/C Relay.
• COMPATIBILITY — Compatible with 1999 Infiniti G20 A/C Relay; Compatible with 2000 Infiniti G20 A/C Relay; Compatible with 2001 Infiniti G20 A/C Relay; Compatible with 2002 Infiniti G20 A/C Relay; Compatible with 1996 Infiniti I30 A/C Relay; Compatible with 1997 Infiniti I30 A/C Relay; Compatible with 1998 Infiniti I30 A/C Relay; Compatible with 1999 Infiniti I30 A/C Relay; Compatible with 2000 Infiniti I30 A/C Relay; Compatible with 2001 Infiniti I30 A/C Relay; Compatible with 2002 Infiniti I35 A/C Relay; Compatible with 2003 Infiniti I35 A/C Relay; Compatible with 2004 Infiniti I35 A/C Relay; Compatible with 1993 Infiniti J30 A/C Relay.
• COMPATIBILITY — Compatible with 1994 Infiniti J30 A/C Relay; Compatible with 1995 Infiniti J30 A/C Relay; Compatible with 1996 Infiniti J30 A/C Relay; Compatible with 1997 Infiniti J30 A/C Relay; Compatible with 2003 Infiniti M45 A/C Relay; Compatible with 2004 Infiniti M45 A/C Relay; Compatible with 1993 Infiniti Q45 A/C Relay; Compatible with 1994 Infiniti Q45 A/C Relay; Compatible with 1995 Infiniti Q45 A/C Relay; Compatible with 1996 Infiniti Q45 A/C Relay; Compatible with 1997 Infiniti Q45 A/C Relay; Compatible with 1998 Infiniti Q45 A/C Relay; Compatible with 1999 Infiniti Q45 A/C Relay; Compatible with 2000 Infiniti Q45 A/C Relay.
• COMPATIBILITY — Compatible with 2001 Infiniti Q45 A/C Relay; Compatible with 2002 Infiniti Q45 A/C Relay; Compatible with 2003 Infiniti Q45 A/C Relay; Compatible with 2004 Infiniti Q45 A/C Relay; Compatible with 2005 Infiniti Q45 A/C Relay; Compatible with 1997 Infiniti QX4 A/C Relay; Compatible with 1998 Infiniti QX4 A/C Relay; Compatible with 1999 Infiniti QX4 A/C Relay; Compatible with 2000 Infiniti QX4 A/C Relay; Compatible with 2001 Infiniti QX4 A/C Relay; Compatible with 2002 Infiniti QX4 A/C Relay; Compatible with 2003 Infiniti QX4 A/C Relay.
• COMPLEMENTARY OEs — When servicing A/C or lighting circuits, technicians often inspect/replace other relays in the same block. Related OEs include 25230-79981 (supersession for 25230-79971), 25230-9B900 (catalog replacement), and sibling relays such as 25230-79915/25230-79917/25230-79945 used for blower/ACC/illumination on select models. These are not universal substitutes; match by VIN and diagram before ordering.