Lexus RX350 (2016 – 2022) Fuse Box Location & Diagrams
The Lexus RX350 (2016–2022) features multiple fuse boxes that protect important electrical systems and components. Finding the correct fuse is essential for diagnosing electrical issues and replacing blown fuses safely. This article includes fuse box locations, detailed diagrams, and fuse assignments for every model year.
Fuse Box Location
Passenger Compartment Fuse Box
The fuse panel is located below the dashboard.
Engine Compartment Fuse Box
Push the tab in and lift the lid off.
Fuse Box Diagram
Passenger Compartment Fuse Box
| Type | No. | Description |
| Fuse MINI 10A | 2 | ECU-B NO.2 |
| Fuse MINI 7.5A | 3 | OBD |
| Fuse MINI 5A | 4 | ECU-B NO.1 |
| Fuse MINI 7.5A | 5 | DOME |
| Fuse MINI 20A | 6 | D/L |
| Fuse MINI 7.5A | 7 | DOOR BACK |
| Fuse MINI 7.5A | 8 | STOP |
| Fuse MINI 30A | 9 | TI&TE |
| Fuse MINI 7.5A | 10 | AM2 |
| Fuse MINI 5A | 11 | ECU-DCC NO.2 |
| Fuse MINI 10A | 12 | HAZARD |
| Fuse MINI 5A | 13 | ECU-DCC NO.1 |
| Fuse MINI 5A | 14 | PANEL |
| Fuse MINI 5A | 15 | METER |
| Fuse MINI 10A | 16 | TAIL |
| Fuse MINI 20A | 17 | DOOR R/R |
| Fuse MINI 20A | 18 | DOOR F/R |
| Fuse MINI 5A | 19 | ECU-B NO.3 |
| Fuse MINI 20A | 20 | DOOR F/L |
| Fuse MINI 10A | 21 | STRG LOCK |
| Fuse MINI 15A | 22 | P/OUTLET NO.1 |
| Fuse MINI 7.5A | 23 | DCM |
| Fuse MINI 5A | 25 | ECU-ACC |
| Fuse MINI 20A | 26 | WASHER |
| Fuse MINI 7.5A | 27 | ECU-IG1 NO. 3 |
| Fuse MINI 15A | 28 | WIPER RR |
| Fuse MINI 5A | 29 | EPS-IG1 |
| Fuse MINI 10A | 30 | ECU-IG1 NO.4 |
| Fuse MINI 10A | 31 | A/BAG-IG2 |
| Fuse MINI 7.5A | 32 | BKUP LP |
| Fuse MINI 5A | 33 | METER-IG2 |
| Fuse MINI 5A | 34 | ECU-IG1 NO.2 |
| Fuse MINI 5A | 35 | ECU-IG2 NO.3 |
| Fuse MINI 5A | 36 | ECU-IG1 NO.1 |
Engine Compartment Fuse Box
| Type | No. | Description |
| Fuse MINI 20A | 1 | (S/HTR RR) Rear seat heater |
| Fuse MINI 30A | 2 | (S/HTR F/L) Front seat heater |
| Fuse MINI 30A | 3 | (S/HTR F/R) Seat heater |
| Fuse MINI 30A | 4 | (ECU-IG1 NO.7) Engine control unit |
| Fuse MINI 30A | 5 | (IG1-MAIN) Protects several circuits |
| Fuse MINI 20A | 6 | (INV) Power outlet (DC/AC inverter) |
| Fuse MINI 7.5A | 7 | (DOOR-DL) Door double locking |
| Fuse MINI 15A | 8 | (P/OUTLET) Cigar lighter / power outlet |
| Fuse MINI 20A | 9 | (S/ROOF NO.2) Sunroof |
| Fuse MINI 30A | 10 | (TOWING BRK) Trailer brakes |
| Fuse FLF/PAL 293 100A | 11 | J/B-AM |
| Multi fuse block MUSB | 12 | (H-LP CLN) Headlight cleaner |
| Multi fuse block MUSB | 13 | (PTC HTR NO.3) Additional heater |
| Multi fuse block MUSB | 14 | (PTC HTR NO.2) Additional heater |
| Multi fuse block MUSB | 15 | (P/SEAT R/R) Power seats |
| Multi fuse block MUSB | 16 | (P/SEAT R/L) Power seats |
| Multi fuse block MUSB | 17 | (PBD) Power back door |
| Multi fuse block MUSB | 18 | (SPARE) Spare fuse |
| Multi fuse block MUSB | 19 | (FAN) Electric cooling fan |
| Multi fuse block MUSB | 20 | (PTC HTR NO.1) Additional heater |
| Multi fuse block MUSB | 21 | (HTR) Air conditioning system |
| Fuse MINI 7.5A | 22 | (WIPER NO.2) Wipers |
| Multi fuse block MUSB | 23 | (ALT) Battery and charging system |
| Multi fuse block MUSB | 24 | (ST) Starter system |
| Multi fuse block MUSB | 25 | (ABS NO.2) Anti-lock braking system |
| Multi fuse block MUSB | 26 | J/B-BAT |
| Multi fuse block MUSB | 27 | (SPARE) Spare fuse |
| Multi fuse block MUSB | 28 | (SPARE) Spare fuse |
| Multi fuse block MUSB | 29 | (ABS NO.1) Anti-lock braking system |
| Multi fuse block MUSB | 30 | (EPS) Electric power steering |
| Fuse MINI 7.5A | 31 | (WIPER NO.3) Wipers |
| Fuse MINI 15A | 32 | (ECU-IG1 NO.9) Engine control unit |
| Fuse MINI 25A | 33 | (FUEL PMP) Fuel pump |
| Fuse MINI 30A | 34 | (TOWING) Trailer lights |
| Fuse MINI 20A | 37 | (INJ) Fuel injectors |
| Fuse MINI 10A | 39 | (ETCS) Electronic throttle control system |
| Fuse MINI 7.5A | 40 | (S-HORN) Horn / anti-theft deterrent |
| Fuse MINI 10A | 42 | D/C CUT |
| Fuse MINI 30A | 43 | (H-LP LH) Left-hand headlight |
| Fuse MINI 10A | 44 | (HORN) Horn |
| Fuse MINI 30A | 46 | (H-LP RH) Right-hand headlight |
| Fuse FMX/JCase 30A | 47 | (WIPER) Wipers |
| Fuse MINI 10A | 48 | ECU-I61 NO.8 |
| Fuse FMX/JCase 50A | 50 | HWD NO.1 |
| Fuse FMX/JCase 50A | 52 | HWD NO.2 |
| Fuse MINI 5A | 53 | (ECU-IG2 NO.1) Engine control unit |
| Fuse MINI 10A | 54 | AVS |
| Fuse MINI 15A | 56 | (STRG HTR) Heated steering wheel |
| Fuse MINI 5A | 57 | (ECU-IG1 NO.6) Engine control unit |
| Fuse MINI 10A | 58 | (ECU-IG1 NO.5) Engine control unit |
| Fuse MINI 15A | 61 | (RADIO NO.2) Radio and audio system |
| Fuse MINI 30A | 62 | (AMP) Audio system |
| Fuse MINI 10A | 63 | (RADIO NO.1) Radio and audio system |
| Fuse MINI 15A | 64 | (H-LP LH-LO) Left-hand headlight low beam |
| Fuse MINI 15A | 65 | (H-LP RH-LO) Right hand headlight low beam |
| Fuse MINI 20A | 66 | (IG2-MAIN) Protects several circuits |
| Fuse MINI 10A | 67 | (IG2) Protects several circuits |
| Fuse MINI 10A | 68 | (P INJ) Fuel injectors |
| Fuse MINI 15A | 69 | V/F HTR |
| Fuse MINI 25A | 70 | (EFI-MAIN) Multiport fuel injection system |
| Fuse MINI 10A | 71 | (EFI NO.2) Multiport fuel injection system |
| Relay | R1 | (WIPER) Wipers |
| Relay | R2 | (PTC HTR NO.1) Additional heater |
| Relay | R3 | (IG1 – MAIN) Protects several circuits |
| Relay | R4 | PIC HTR NO.2 |
| Relay | R5 | WSH NZL HTR |
| Relay | R6 | (H-LP RH) Right-hand headlight |
| Relay | R7 | (S-HORN) Horn / anti-theft deterrent |
| Relay | R8 | (ST) Starter system |
| Relay | R9 | (H-LP CLN) Headlight cleaner |
| Relay | R10 | (FUEL PMP) Fuel pump |
| Relay | R11 | (H-LP LH) Left-hand headlight |
| Relay | R12 | (HORN) Horn |
| Relay | R13 | (FAN) Electric cooling fan |
| Relay | R14 | (PTC HTR NO.3) Additional heater |
| Relay | R16 | (INJ) Fuel injectors |
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