Owners Nissan Primera P12 sooner or later they encounter a problem: the stove blows weakly, makes strange sounds, or stops working altogether. In 90% of cases it is to blame heater fan motor - its brushes wear out, bearings jam, and sometimes the winding burns out. Replacing a part costs 3–5 thousand rubles in service, but if you wish, you can do everything yourself in 1–2 hours.

This article is not just a retelling of the manual. Here you will find real life hacks from the owners Primera P12who have already gone through this procedure: how to do without removing the panel, which bolts most often rust, and why a new motor may not work the first time. And also - a table of spare parts compatibility and answers to questions that are not covered even in service manuals.

Signs of a malfunctioning heater motor

Before you get to the tools, make sure that the problem is with the fan. Typical symptoms:

  • 🔊 Noise or grinding noise when the stove is operating, this is a sign of wear on the bearings or debris getting into the impeller.
  • 🌀 Weak air flow at any speed - the brushes of the motor are worn out, and it does not develop the required speed.
  • 🚫 The stove doesn't turn on at all - Possible open circuit, blown fuse (F30 at 30A) or resistor failure.
  • 🔥 Burning smell from the air ducts - the motor winding has burned out or the contacts have melted.

If when you turn on the stove at maximum speed (4th mode) the air flows normally, but in modes 1–3 it barely blows - the problem is speed resistor, and not in the motor. Replacing it is easier and cheaper.

📊 What exactly is wrong with your stove on Primera P12?
  • Doesn't blow at all
  • Weak air flow
  • Noise/grinding
  • Burning smell
  • Other

Preparation: tools and spare parts

To work you will need:

  • 🔧 Tools:
    • Phillips screwdriver (PH2)
    • Socket wrench on 10 mm (or head with extension)
    • Flat head screwdriver for prying out clips
    • Tweezers (for removing small parts)
  • 🛠️ Consumables:
    • New heater motor (article no. 27350-4M000 or analogues: Valeo 698933, Febi 27350)
    • Heat shrink tubing or electrical tape (for contacts)
    • WD-40 (if the bolts are soured)

Important: motors for Primera P12 There are two types - with 3 contacts (until 2004) and 4 contacts (after 2004). Check the version before purchasing! Also check if it is included o-ring — without it there will be a suction of cold air.

Article Manufacturer Compatibility Notes
27350-4M000 Original Nissan All P12 (2002–2008) Expensive but reliable
698933 Valeo P12 until 2004 3 contacts, requires connector modification
27350 Febi P12 after 2004 4 contacts, terminals included
27350-4M010 Nissan (restyle) P12 2005–2008 Improved moisture protection
⚠️ Attention: If you buy a non-original motor, check the length of the impeller shaft. For some analogues, it is 2–3 mm shorter, which is why the blades will cling to the body.

Removing the stove motor: step-by-step instructions

On Primera P12 The motor is located under the glove compartment, but getting to it is not so easy. The main difficulty is three mounting bolts, one of which is hidden behind a plastic cover. Let's consider two methods: with partial and complete removal of the panel.

Method 1: Without removing the dashboard (for experienced)

This method is suitable if you have thin hands and patience. Procedure:

  1. Disable negative battery terminal - this is mandatory to avoid a short circuit when disconnecting the connectors.
  2. Remove the glove compartment: unscrew the 4 screws (PH2) from below and 2 bolts (10 mm) from above, then pull it towards you.
  3. Disconnect the glove compartment light connector (it is on the latch, pull it up).
  4. Under the glove compartment you will see a plastic motor casing. It is attached to 3 clips - pry them off with a flat-head screwdriver.

Now the most difficult moment: bolt access. One of them is located on the lower right - it can be unscrewed with a socket wrench on 10 mm with extension cord. The second bolt is hidden behind a plastic cover on the left - you need to carefully bend it without breaking the latch. The third bolt (the most problematic) is located on top and is screwed into a metal beam. Help here gimbal adapter for the key.

Disconnected battery terminal|Removed glove compartment|Disconnected backlight connector|Removed plastic casing|Prepared tool for bolts-->

Method 2: By removing the center console (more reliable)

If you've never figured it out Primera P12, it's better to go this route. It takes longer (about 1.5 hours), but guarantees access to all fastenings:

  1. Remove the gear shift knob (pull up firmly).
  2. Unscrew the 4 bolts securing the center console (10 mm) - two in front under the cup holders, two in the back.
  3. Lift the console up and disconnect the connectors heated seats (if any) and cigarette lighter.
  4. Remove the plastic trim under the steering wheel (3 clips) - this will give access to the top bolt of the motor.

After this, the motor can be removed by first disconnecting the power connector. Be careful: on some versions P12 wires come from additional fastening to the body — don’t pull them by force!

How to avoid clips breaking during disassembly?

Use a plastic spatula to remove the panel - a metal screwdriver will often break the latches. Before removing the pads, warm them with a hairdryer (temperature 50–60°C) to make the plastic more elastic. Clips on Primera P12 fragile, especially after 10 years of use.

Common mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing a motor. Here's what most often goes wrong:

  • 🔌 Terminals mixed up when connecting a new motor. On P12 the connector has a key (protrusion), but some analogues do not have it - check the polarity with a tester.
  • 🔧 Loose bolts fastenings The vibration from the operation of the motor will spin them over time, and it will begin to dangle.
  • 🌀 Forgot to install the o-ring. Without it, cold air will be sucked past the heater radiator.
  • 🔥 Short circuit due to damaged wire insulation. Always test the circuit with a multimeter before assembly.

Critical error: ignoring the speed resistor check. On Primera P12 it fails in 30% of cases at the same time as the motor. If after replacement the stove does not blow at speeds 1–3, it is he who is to blame (article number 27380-4M000).

⚠️ Attention: When installing a new motor, do not lubricate the shaft or bearings! Most modern models have lifetime lubrication, and excess oil attracts dust and accelerates wear.

Checking functionality after installation

Before putting the panel back together, make sure everything works:

  1. Connect negative battery terminal.
  2. Turn on the ignition and run the heater on 1st speed. Listen: there should be a smooth hum without squeaks.
  3. Switch to 4th speed — the air flow should increase noticeably.
  4. Check all airflow modes (legs, face, windows) - sometimes after replacing the motor the damper jams.

If the stove does not turn on:

  • Check fuse F30 (30A) in the block under the hood.
  • Make sure the motor connector is connected until it clicks.
  • Measure the voltage at the motor terminals with the heater on - it should be 12–14 V.
💡

If the new motor hums but does not rotate, try turning the impeller slightly by hand. Sometimes brushes “stick” after long storage.

Repair cost: comparison with service

Prices for replacing a heater motor in services vary depending on the region:

Service Cost (₽) Time (hours)
Stove diagnostics 500–1000 0.5
Replacing the motor (without removing the panel) 2500–3500 1–1.5
Replacing the motor (with removing the panel) 4000–6000 2–3
Replacing motor + resistor 5000–7000 2.5–3.5

When repairing yourself, your costs will be limited to the cost of the spare part (1500–3000 ₽) and possibly purchasing a tool. Savings - up to 70%!

💡

If you have never disassembled the panel Primera P12, it is better to choose the method of removing the center console. This takes longer, but ensures access to all fasteners and minimizes the risk of breaking the clips.

FAQ: Frequently asked questions about replacing the heater motor

Is it possible to repair an old motor instead of replacing it?

Theoretically, yes: if the problem is in the brushes or bearings, they can be replaced. However, on Primera P12 the motor has non-separable body, and for repair you will need:

  1. Carefully saw the body along the seam.
  2. Replace the blades (suitable for the windshield wiper motor VAZ 2110).
  3. Lubricate bearings Litol-24.
  4. Glue the body with epoxy resin.

But such repairs rarely last longer than a year, so it’s easier to buy a new motor.

Why does the new motor only work at 4th speed?

This is a classic sign of trouble. speed resistor (article 27380-4M000). On Primera P12 it is located next to the motor and often burns out at the same time as it. Replacing a resistor takes 10 minutes and costs 800–1500 ₽.

How to check the heater motor without removing it?

Remove the connector from the motor and apply it to it 12 V directly from the battery (plus on red wire, minus by black). If it doesn't spin, that's the problem. If it turns on, but does not work in the car, look for a break in the wiring or a malfunction of the heater control unit.

What should I do if after replacement the stove blows cold air?

Probable reasons:

  • Not installed o-ring on the motor - cold air is sucked past the radiator.
  • Jammed stove damper - check it with your hand (it should move freely).
  • There is little antifreeze in the system - add to the level and bleed the system.
Will the motor from other Nissan models fit?

Partially yes. Motors from Nissan Almera N16 (27350-4M025) and Nissan Sentra B16 (27350-6M000) are suitable for fastenings, but have a different shaft length. You will need:

  1. Shorten the shaft by 3–5 mm (with a grinder or hacksaw).
  2. Sharpen the plastic casing for the new connector.

It's better not to experiment - original or Valeo last longer.