Nissan Sentra B17 (2013-2019) is a popular sedan, but even its fuses fail over time. A headlight failure, a malfunctioning heater, or a suddenly stalled engine are most often to blame for a blown fuse. In this article we will look at where the fuse boxes are located in Sentra B17, how to check and replace them correctly, as well as what mistakes owners make when diagnosing.

We have collected current diagrams with a description of each fuse, added photos of real blocks and detailed instructions. Particular attention was paid to typical problems - for example, why fuses burn IGPD or ECU-B, and how this relates to generator or alarm malfunctions. If you don’t want to waste time on the service, this article will help you do it yourself.

Where are the fuse boxes located in Nissan Sentra B17

B Sentra B17 fuses are distributed over three main blocks:

  • 🔧 Main unit in the cabin — under the instrument panel to the left of the steering wheel (behind the protective cover). This is where fuses for lighting, climate control and electronics are concentrated.
  • 🚗 Block under the hood — next to the battery, in a plastic box with a black lid. Responsible for the power circuit (starter, generator, fans).
  • ⚡ Additional relay block - often confused with the fuse box, but there are only relays (for example, a fan or fuel pump relay). Located next to the block under the hood.

Important: in some trim levels Sentra B17 (for example, with NissanConnect) there may be an additional mini-fuse box behind the glove compartment - it is responsible for multimedia and navigation. If your screen is not working, check it first.

📊 Where do your fuses burn most often?
  • In the salon block
  • In the block under the hood
  • In the relay block
  • I don't know, haven't checked

Fuse diagram and decoding Nissan Sentra B17 (2013–2019)

Below is a table with the assignment of fuses for main cabin unit. The numbers correspond to the markings on the block cover. Please note: depending on the year of manufacture and configuration, the location may vary slightly (for example, in models 2017–2019, a fuse has been added F37 for the system ProPILOT Assist).

Fuse no. Denomination (A) Purpose Symptoms of a problem
F1 10A Engine management system (ECU), immobilizer The engine does not start, the immobilizer indicator is flashing
F10 15A Audio system, NissanConnect, USB port The radio does not work, the phone does not charge
F19 10A Speed sensor, speedometer, cruise control The speedometer does not work, the tachometer needle twitches
F25 20A Heated seats, mirrors, rear window The seats don't warm up, the rear window fogs up
F30 15A Body control unit (BCM), central locking The windows don't work, the doors don't close using the key fob.

Attention: fuse F32 (10A) is responsible for the operation of the rear view camera. If the image disappears, but the screen turns on, check that one. It often breaks down after unsuccessful parking with the camera turned on.

For the unit under the hood, the key fuses are:

  • 🔋 F101 (100A) - generator main fuse. If it burns out, the battery does not charge, the panel lights up Battery Warning.
  • 💡 F105 (30A) - low/high beam (left headlight). If it burns out frequently, check the lamps for short circuits.
  • ⚡ F110 (50A) - electric cooling fan. When it comes out, the engine overheats, especially in traffic jams.
How to check a fuse without a tester?

If you don't have a multimeter at hand, you can visually inspect the fuse in the light. A blown fuse will have a broken metal thread inside. You can also use the “replacement method” - temporarily install a known-good fuse with the same rating from another slot (for example, from the cigarette lighter).

How to check the fuse in Nissan Sentra B17: step by step instructions

For diagnosis you will need:

  • 🔧 Flat screwdriver (for removing the block cover).
  • 📊 Multimeter (or tester with dialing function).
  • 🔦 Flashlight (lighting in the block under the hood is often insufficient).
  • 🧤 Gloves (so as not to leave fingerprints on the contacts).

Verification algorithm:

  1. Turn off the ignition and remove the negative terminal from the battery (required!).
  2. Remove the cover of the fuse box (in the passenger compartment, pry up the latches with a screwdriver, under the hood, press out the latches).
  3. Find the fuse according to the diagram (the number is indicated on the block cover).
  4. Remove the fuse with tweezers (usually it is attached to the block cover).
  5. Set the multimeter to continuity mode and touch the fuse contacts with the probes. If there is no sound signal, the fuse has blown.

Ignition off|Battery terminal removed|Tweezers ready for removal|Spare fuses on hand|Lighting checked (flashlight)

-->

If the fuse is intact but the problem remains, check:

  • 🔌 Contacts in the block - oxidation or poor clamping can simulate a fuse failure.
  • 🔄 Relay - the fan relay often fails (R101) or fuel pump (R103).
  • 🔍 Wiring - frayed wires or short circuit in the circuit.
💡

If the fuse burns again after replacement, there is a short circuit in the circuit. Do not install a fuse of a higher rating! This may cause the wiring to catch fire.

Typical problems with fuses in Sentra B17 and their reasons

Owners Nissan Sentra B17 Often faced with several "chronic" problems related to fuses:

⚠️ Attention: If your fuses are constantly blowing F1 (10A, ECU) or F30 (15A, BCM), a faulty alarm or “jambs” after installing autostart are to blame. Check connection to CAN bus - often craftsmen short the wires to ground.

Common symptoms and their causes:

Symptom Likely culprit Reason
Power windows don't work fuse F28 (25A) or relay R105 Short circuit in the window lift motor or contact oxidation
Low beam lost (one headlight) fuse F105 (30A) or F106 (right headlight) Short circuit in the lamp or moisture in the headlight
Battery won't charge fuse F101 (100A) or generator diode bridge Circuit overload (for example, after “lighting up” another car)
Heater/air conditioner not working fuse F15 (10A) or relay R102 Short circuit in the fan motor or malfunction of the climate control unit

The fuse deserves special attention F37 (10A) - he is responsible for the work all-round cameras (in configurations with Safety Shield 360). If the camera turns off when moving or shows artifacts, check:

  • 🔌 Camera connector contacts (often oxidize after washing).
  • 📶 Antenna cable (may fray in the corrugation of the trunk door).
  • 🔄 Fuse F10 (15A) - it also affects the power supply of multimedia.

How to replace a fuse in Nissan Sentra B17: errors and rules

Replacing a fuse seems simple, but many owners make critical mistakes that lead to serious damage. That's what can't do:

  • ❌ Install a fuse higher denomination (eg 20A instead of 10A). This may burn the wiring or control unit.
  • ❌ Use “bugs” (twisted foil or wire). B Sentra B17 this often causes the fuse box to fire.
  • ❌ Change fuses with the ignition on. It might hurt ECU or BCM.
  • ❌ Ignore re-burnout. If the new fuse burns out immediately, look for a short circuit!

Correct replacement algorithm:

  1. Disconnect the negative terminal of the battery.
  2. Remove the burnt fuse using tweezers (not your fingers!).
  3. Check the new fuse for compliance with the rating (written on the body).
  4. Install the fuse until it clicks (it should fit tightly).
  5. Connect the battery and check the circuit operation.
💡

If the problem persists after replacing the fuse, check the relay in the same block. For example, a cooling fan not working may be caused by a faulty relay R110, not a fuse F110.

For fuses under the hood (eg F101 at 100A) additional rules apply:

  • 🔧 Use only original fuses Nissan or analogues with the same denomination (for example, Littlefuse).
  • 🔥 Do not touch contacts with bare hands - oil from the skin worsens conductivity.
  • 🔄 After replacement, check the voltage at the battery terminals (should be 13.8–14.4V with the engine running).

Where to buy fuses for Nissan Sentra B17: original vs analogues

Original fuses Nissan are sold at dealerships, but they can be replaced with high-quality analogues. The main thing is to comply with the denomination and type (in Sentra B17 fuses are used mini-blade for the cabin unit and maxi-blade for the engine compartment).

Fuse type Original article Analogs (brand) Average price, rub.
Mini-blade (10A–30A) 28550-JA00A (set) Littlefuse, Bussmann, Hella 50–200 per piece.
Maxi-blade (30A–100A) 28550-4M00A Eaton, Pico 150–500 per piece.
Relay (standard) 25230-4M000 Bosch, Valeo 300–800

Where to buy:

  • 🛒 Official dealers — guarantee of original parts, but the price is 30–50% higher.
  • 🌍 Online stores (Exist.ru, Autodoc, Kufar.by) - convenient to order fuse sets.
  • 🏬 Auto stores (ATL, AutoSpetsCenter) - you can check compatibility on site.
⚠️ Attention: Stores often offer “universal” fuses from unknown brands (for example, NoName from China). They may not withstand the declared current and melt, which leads to fires. Check the certificates!

To save money you can buy fuse set (For example, Littlefuse Mini Blade Assortment), where there are all ratings from 5A to 30A. Such a set will cost 500–800 rubles and will cover 90% of the needs.

Frequently asked questions about fuses Nissan Sentra B17

Why in mine Sentra B17 fuses are always on F1 (ECU) and F30 (BCM)?

This is a typical problem after installing an alarm or autostart. The most common culprit is an incorrect connection to CAN bus (wires CAN-H And CAN-L). Also check:

  • The quality of the “crimp” of the wires (twisting is often used instead of soldering).
  • Block voltage BCM (should be 12V without surges).
  • The condition of the negative wire from the battery to the body (oxidation leads to voltage surges).

If the problem persists, contact your alarm installer to reflash it. BCM.

Can fuses from other Nissan models be used (e.g. Qashqai or X-Trail)?

Yes, but with reservations:

  • Fuses mini-blade (for interior) interchangeable with Qashqai J11, Note E12, Juke F15.
  • Fuses maxi-blade (under the hood) fit from X-Trail T32 or Pathfinder R52.
  • Relays may differ in contact group - it is better to check by article numbers.

The main thing is coincidence denomination And type (size). For example, a 10A fuse from Almera G15 suitable for Sentra B17, if it is the same size.

What to do if after replacing the fuse F101 (100A) did it burn out again?

This is a sign of a serious malfunction in the generator circuit. Possible reasons:

  1. Short circuit in the generator — check the diode bridge and winding.
  2. Breakdown in the wire from the generator to the battery — inspect the insulation (it often rubs against the bracket).
  3. Defective battery - if it “boils” or has an internal short circuit, this can cause current surges.
  4. Problems with ECU - rarely, but it happens that the control unit “pours” current to ground.

Do not reinstall the fuse! Disconnect the generator (by removing the connector from it) and check the circuit with a multimeter in resistance mode.

How to check the relay in Sentra B17, if the fuse is intact, but the device does not work?

To check the relay:

  1. Remove the relay from the block (for example, R101 for a fan).
  2. Ring the contacts with a multimeter 85 And 86 (winding) - resistance should be 50–120 Ohms.
  3. Apply 12V to the contacts 85 And 86 - a click should be heard (contacts closing 30 And 87).

If the relay does not click, it is faulty. Also inspect the contacts for melting or oxidation.

Do I need to lubricate the fuse contacts in the block?

Yes, but only special lubricant for electrical contacts (for example, Liqui Moly Electronic-Spray or CRC 2-26). Don't use:

  • WD-40 is non-conductive and dries out over time.
  • Litol or grease - they collect dust and worsen contact.
  • Graphite grease - it is abrasive and wears off the contact coating.

Lubricate contacts 1-2 times a year, especially before winter (humidity accelerates oxidation).