Relay in Nissan Micra - these are small but critical components on which the operation of all electrical equipment of the car depends. The failure of even one relay can result in the headlights, cooling fan, power windows, or even the engine not starting. In this article we will analyze where are the relays located in different generations Micra (K11, K12, K13), as they are check with a multimeter, what signs of trouble and how to replace it yourself without contacting service.

We will pay special attention starter relay and main relay — their breakdowns are most common and can simulate serious problems with the engine. You will also find fuse and relay block diagrams with explanations, relevant for the Russian market, and advice on choosing high-quality analogues of original relays from Nissan.

Where are the relays located in Nissan Micra: blocks and their location

B Nissan Micra relays and fuses are distributed over several blocks, depending on the generation and configuration. Main places to look for them:

  • 🔧 Main unit in the cabin — located to the left of the steering column, under the instrument panel. In most models it is closed with a plastic cover with the inscription FUSE & RELAY BOX.
  • 🔋 Additional block under the hood - found in Micra K13 (2010–2017) and K12 (2002–2010). Usually located next to the battery, in a plastic box.
  • ⚡ Starter and main relay - can be issued separately. For example, in Micra K11 (1992–2002) the main relay is often located behind the glove compartment.

B Micra K13 (last generation sold in Russia) the main fuse and relay box is located under the steering wheel, behind the protective cover. To gain access you need:

  1. Turn the steering wheel to the left all the way.
  2. Press the cover latch (located at the bottom) and pull it towards you.
  3. On the back of the cover there will be a diagram indicating the relays and fuses.
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If the circuit on the cover is worn out or missing, take a photo of the unit before removing the relay - this will help you avoid confusing them when reinstalling them.

B Micra K12 The relay block may be hidden deeper; access sometimes requires removing the lower part of the dashboard. In old K11 relays are often duplicated in different places, so when diagnosing, check all possible locations.

Nissan Micra relay diagrams by generation (K11, K12, K13)

Every generation Micra has a unique relay layout. Below we provide current diagrams for Russian versions of cars.

Nissan Micra K13 (2010–2017)

Designation Relay purpose Rated current
R1 Starter relay 30–40 A
R2 Main relay 20 A
R3 Cooling fan relay 30 A
R7 Heated rear window relay 25 A
R10 Low beam relay 15 A

B Micra K13 relay R1 (starter) and R2 (most importantly) most often fail. Signs of their malfunction: the engine does not start or starts only after several attempts, power is lost on the dashboard.

Nissan Micra K12 (2002–2010)

In this generation, the relays are located more compactly, but there are more of them. For example, there are separate relays for:

  • 💡 Side lights (R5)
  • 🔊 Sound signal (R8)
  • 🚗 Gasoline pump (R12)

Feature K12 — fuel pump relay often freezes due to contact oxidation. If the car stalls while driving or does not start the first time, check it.

📊 What generation of Nissan Micra do you have?
  • K11 (1992–2002)
  • K12 (2002–2010)
  • K13 (2010–2017)
  • Other

Signs of a faulty relay in a Nissan Micra

The relay in a car is an electromechanical device and will wear out over time. You can recognize its malfunction by the following symptoms:

  • 🚨 Electrical failure — headlights, power windows, wipers or cooling fan do not work.
  • 🔄 Intermittent crashes - for example, the low beam sometimes turns on, sometimes it doesn’t, or the cooling fan works every once in a while.
  • 🔋 Clicks without operation — if you hear clicks when you turn on the headlights or starter, but the equipment does not work, the relay is to blame.
  • 🔥 Burnt contacts — upon visual inspection, traces of melting or oxidation are visible on the relay legs.

One of the most insidious signs is the car won't start, but the starter turns. In this case it's to blame main relay (main relay) that does not supply power to the ECU or fuel pump. B Micra K12 And K13 This relay often “sticks” due to overheating.

⚠️ Attention! If the problem remains after replacing the relay, check fuses And wiring. Often the cause of relay failure is a short circuit in the circuit that burned it.

One more nuance: in Micra K11 The starter relay may fail due to wear on the contact group in the ignition switch. Before replacing a relay, check the voltage at its control contact (usually 85 or 86).

How to test a Nissan Micra relay with a multimeter

Checking the relay takes 5–10 minutes and does not require special skills. You will need multimeter (or even a simple 12V light bulb) and jumper wires. Verification algorithm:

  1. Removing the relay — carefully pull it out of the socket (you can pry it off with a screwdriver).
  2. Visual inspection — check the legs for oxidation or melting.
  3. Winding continuity - connect the multimeter in resistance mode to the contacts 85 And 86. Resistance must be within 50–120 Ohm.
  4. Checking contacts - apply 12 V to 85 And 86, and then check the continuity between 30 And 87 (must be 0 ohm when triggered).

If the relay does not click when voltage is applied or the winding resistance is equal infinity, it needs to be replaced. B Micra relays of standard size are often used, so analogues from Bosch, Hella or Valeo.

☑️ What is needed to check the relay

Done: 0 / 4

For starter relay (R1) and main relay (R2) in Micra K13 there is a caveat: it is better to check them without taking off, connecting the multimeter directly to the contacts in the block. This is due to the fact that during dismantling the connectors can be damaged.

Replacing a relay in a Nissan Micra: step-by-step instructions

Replacing a relay is one of the simplest procedures that even a beginner can handle. The main thing is do not mix up the relays and make sure that the new relay matches the parameters. Let's look at the process using an example Micra K13:

  1. Disconnect the battery - remove the negative terminal to avoid a short circuit.
  2. Remove the relay box cover — it is attached with latches (in K13) or screws (in K11).
  3. Find the faulty relay — follow the diagram on the lid or a photo taken in advance.
  4. Remove the old relay - pull it up, shaking it a little. If it doesn't work, use a flathead screwdriver.
  5. Install a new relay - it should go in without effort. Make sure the contacts are not bent.
  6. Check your work - connect the battery and turn on the equipment for which the relay is responsible.

B Micra K11 And K12 fuel pump relay (R12) can be located under the rear seat. To replace it:

  1. Fold down the back seat.
  2. Remove the fuel pump hatch (fastened with latches).
  3. Disconnect the connector from the relay and replace it with a new one.
⚠️ Attention! If after replacing the fuel pump relay the car still does not start, check fuel pump fuse (F15, 15 A) and the voltage at the pump connector (must be 12 V when the ignition is turned on).

When purchasing a new relay, pay attention to rated current And standard size. For example, the starter relay in Micra K13 must withstand 40 A, and the fan relay is 30 A. Cheap Chinese analogues often do not meet the stated parameters and quickly fail.

Which relays are better to choose for Nissan Micra: original vs analogues

Original relays from Nissan They are more expensive than their analogues, but do not always justify their price. In most cases, quality substitutes can be used. Here's what the experts recommend:

Relay type Original art. Recommended analogue Notes
Main relay 25230-3M200 Bosch 0 332 019 150 Suitable for K12 And K13
Starter relay 25230-4M000 Hella 4RA 003 503-331 Withstands up to 40 A
Fan relay 25230-3M205 Valeo 403001 For K11 And K12

When choosing an analogue, pay attention to:

  • 🔌 Standard size - most relays in Micra have a standard size ISO 280.
  • 📊 Rated current - it is indicated on the relay body (for example, 30A or 40A).
  • 🔄 Contact type - some relays are used gold contacts for better conductivity.

Avoid relays without markings or with inscriptions such as "Made in China" without brand indication. Such products often have poor build quality and can cause a fire due to poor contacts.

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Even the original relay can fail due to network overloads. If the new relay burns out quickly, look for the cause in the wiring or consumers (for example, a short circuit in the headlight circuit).

Frequently asked questions about the Nissan Micra relay (FAQ)

Why does the cooling fan relay often light up in Micra K13?

B Micra K13 fan relay (R3) fails due to:

  • The radiator is dirty (the fan is running at high speed).
  • Poor contact in the relay connector (oxidation).
  • Coolant temperature sensor malfunction.

Before replacing the relay, check radiator condition And wiring.

Is it possible to repair the relay with your own hands?

Theoretically yes, but not recommended. The relay is a sealed device, and once opened it loses its protection against moisture. If the contacts are burnt, they can be cleaned with fine sandpaper, but this is a temporary solution. It is better to replace the relay with a new one.

How to test the main relay without a multimeter?

Can be used 12 V indicator light:

  1. Connect one end of the lamp to 85 relay contact, the other to the battery positive.
  2. Connect the battery negative to 86 contact.
  3. If the relay is working properly, the lamp will light up and you will hear a click.
Which relay is responsible for low beam in Micra K12?

B Micra K12 The relay controls the low beam R10 (15 A). It is located in the main fuse box. If the low beam does not work, also check fuse F20 (10 A) and light bulbs.

Why does the car still not start after replacing the starter relay?

Possible reasons:

  • Defective starter (check it separately).
  • Problems with ignition switch (no signal to relay).
  • Discharged battery (voltage below 11.5 V).
  • Defective immobilizer (in K13 it may block startup).