Nissan Cefiro A32 (1994–1998) is a legendary business class sedan, but even it has its weaknesses. One of them is stove motor, which over time begins to make noise, operate jerkily or fail altogether. If the cabin has become cold, and suspicious sounds are coming from under the dashboard, the culprit has been found: the heater fan requires attention.
In this article we will analyze all typical heater motor malfunctions on Cefiro A32, we will learn how to diagnose a problem without disassembling the interior and describe in detail the replacement process - from choosing a spare part to the intricacies of assembly. We'll also tell you why original motor from Nissan with article number 27350-4M000 will last longer than its analogues, but it can be successfully replaced with a budget alternative from Denso.
Signs of a malfunctioning heater motor: when to sound the alarm
The first symptoms of a problem with the heater fan are often ignored, attributed to the “age” of the car. But delay is fraught: a motor failure in the middle of winter or a bearing jamming can result in engine overheating (if the stove is connected to the cooling system) or a short circuit. Pay attention to these signals:
- 🔊 Extraneous sounds - creaking, squealing or humming when the stove operates at any speed. Most often the reason is worn out bearings or debris getting on the blades.
- 🌀 Uneven operation — the fan either accelerates or slows down without changing the position of the regulator. Culprit - brush wear or reservoir oxidation.
- 🔥 Lack of air — the stove does not blow even at maximum speed. Check the fuse
F10 (10A)and relays, but if they are working, the motor is burned out. - 💨 Weak air flow at high speeds. Perhaps clogged cabin filter or the rotor magnet has become weak.
Particularly insidious intermittent failure: The heater may work normally, but after the engine warms up or in humid weather it may stall. This is a sign oxidized contacts in the motor connector or a break in the winding. It’s easy to check: move the block of wires on the motor - if the stove starts working, the problem is in the contacts.
⚠️ Attention! If there is a smell of burnt plastic coming from under the dashboard, turn off the heater immediately. This is a sign of a short circuit in the motor or overheating of the winding. Continued use may result in fire!
- Extraneous sounds
- The stove doesn't blow at all
- Weak air flow
- Uneven operation
- Another option
Diagnostics of the stove motor: from simple to complex
Before disassembling the torpedo, make sure that the problem is in the motor. Start by checking electrical circuit:
- fuse - Locate the fuse box under the steering wheel (driver's side) and check
F10 (10A). If it burns out, replace and check the stove. If the fuse blows again, look for a short circuit. - Relay - on Cefiro A32 The heater fan relay is located in the additional unit behind the glove compartment. Swap it with a similar one (for example, a low beam relay) and check the operation of the stove.
- Speed switch - contacts often oxidize or the resistor breaks. Turn the control knob: if the stove works in some positions, but not in others, the problem is in the switch.
If the circuit is OK, go to direct motor diagnostics:
- 🔧 Remove the connector from the motor (it is located under the glove compartment, to the right of the passenger’s feet).
- 🔋 Supply 12V directly from the battery to the motor contacts (the polarity is not important - if it doesn’t work, swap them). A working motor should spin.
- 🔍 Check winding resistance multimeter: normal - 2–5 ohms. Infinity is a break, zero is a short circuit.
If the motor does not respond to direct power or the winding resistance is not normal, it’s time to change it. If it spins but does not work in the car, look for the problem in wiring or climate control unit.
On Cefiro A32 The heater motor can be checked without removal: just get to the connector and apply power directly. If it works, the problem is in the control circuit, and not in the fan itself.
Choosing a stove motor: original vs analogues
When replacing the heater motor with Nissan Cefiro A32 Owners have three options: original, analogues from Denso And budget substitutes. Let's look at the pros and cons of each:
| Part type | Article | Price, ₽ | Pros | Cons |
|---|---|---|---|---|
| Original (Nissan) | 27350-4M000 |
8 000–12 000 | Guaranteed compatibility, long service life (100+ thousand km), quiet operation | High price, rarely available |
| Analogue (Denso) | 394-0001 |
4 500–6 000 | The quality is not inferior to the original, widespread in stores, suitable for Nissan Maxima A32 | Sometimes you come across fakes |
| Budget (Febi, Meat & Doria) | 27350 (universal) |
2 000–3 500 | Low price, fast delivery | Service life 20–50 thousand km, increased noise possible |
If your budget allows, it is better to choose original or Denso - they will last longer and will not cause trouble. Budget analogues are often they make noise And fail quickly, especially if the machine is operated in conditions of high humidity (for example, in St. Petersburg or Vladivostok).
When purchasing, pay attention to:
- 📦 Packaging — the original comes in a branded box Nissan with a hologram.
- 🔍 Marking — the manufacturer’s article number and logo must be printed on the motor body.
- 🔄 Availability of oil seal - in cheap analogues it is often skimped on, which leads to dust getting on the brushes.
⚠️ Attention! On Cefiro A32 with climate control (Automatic Air Conditioner) a motor with a different connector is installed (27350-4M001). Check the equipment of your car before purchasing!
Step-by-step replacement of the stove motor with Nissan Cefiro A32
Replacing the heater fan with Cefiro A32 does not require special tools, but will require patience - access to the motor is difficult. The whole process will take 1.5–2 hours at the first replacement. You will need:
- 🔧 Phillips and flat screwdrivers.
- 🔨 10 mm socket wrench.
- 🧲 Magnet for bolts (so as not to lose in the cabin).
- 🧴 WD-40 or similar lubricant for stuck fasteners.
Work order:
- Remove the negative terminal from the battery - this is mandatory for safety.
- Remove the glove compartment:
- Unscrew the two screws at the bottom of the glove compartment (under the plastic plug).
- Pull the glove compartment towards you and disconnect the backlight bulb.
After assembly, check the operation of the stove at all speeds. If the motor is noisy or vibrates, it may be installed crookedly or there may be dirt on the blades.
☑️ Checklist before installing a new motor
Typical replacement mistakes and how to avoid them
Even experienced car owners sometimes make mistakes that lead to repeated breakdown or additional expenses. Here's what not to do:
- 🚫 Ignore snail cleaning — accumulated dirt and leaves can block the blades of the new motor.
- 🚫 Use force when removing the connector — the contacts are fragile and easy to break. If the connector cannot be removed, spray WD-40.
- 🚫 Do not check operation at all speeds — if the motor does not work at speed 1–2, the problem may be in the resistor, and not in the fan itself.
- 🚫 Install the motor without an O-ring - this will lead to dust ingress and rapid wear of the brushes.
Another common mistake is buying a motor without checking the article number. On Cefiro A32 Two types of fans were installed:
27350-4M000- for cars with manually controlled heater.27350-4M001- for versions with climate control.
They are similar in appearance, but have different connectors and winding resistance. Check the equipment of your car before purchasing!
What to do if the stove does not work after replacement?
Check fuse F10 (10A) - it may have burned out when connected. Also make sure that the connector is connected correctly (sometimes the contacts are reversed). If the problem persists, check the relay or climate control unit.
Prevention: how to extend the life of a stove motor
The average service life of the heater motor is Cefiro A32 — 80–120 thousand km, but with proper care it can be increased by 1.5–2 times. Follow these tips:
- 🌬️ Change the cabin filter every 15 thousand km — a clogged filter increases the load on the fan.
- 💧 Avoid moisture — after washing or rain, dry the interior, do not turn on the heater at full power immediately.
- 🔧 Lubricate bearings — once every 50 thousand km, add 2-3 drops of oil for electric motors (for example, Liqui Moly Elektro-Spray) into the holes at the end of the motor.
- 🔄 Clean your snail periodically — once a year, remove the motor and remove leaves, dust and other debris.
If the stove starts making noise but is still working, you can try restore the motor:
- Disassemble it (carefully so as not to damage the winding).
- Clean the collector from carbon deposits using fine sandpaper (
zero). - Wash the bearings with gasoline and lubricate.
- Replace the brushes if they are worn (their length must be at least 5 mm).
This method will extend the life of the motor by 20–30 thousand km, but does not guarantee long-term results.
Regular cleaning of the snail and replacing the cabin filter reduces the load on the heater motor by 30–40%, which increases its service life by 1.5 times.
FAQ: Frequently asked questions about the heater motor Nissan Cefiro A32
Is it possible to drive without a working heater?
Technically yes, but it's not safe. On Cefiro A32 The heater is connected to the rear window heating system and can affect the operation of the climate control. In the cold season, a non-working stove will lead to fogging of the windows and poor visibility. In addition, when driving for a long time with the heater turned off, the engine may overheat (if the heater radiator is clogged).
Why does the stove only work at speed 4?
This is a classic sign of trouble. heater resistor (part with article number 27380-4M000). It is located next to the motor and is responsible for adjusting speeds. If the resistor fails, the fan operates only at maximum speed, since power is supplied directly, bypassing resistance. Replacing a resistor takes 10 minutes and costs 800–1,500 rubles.
Which stove motor is suitable for other models? Nissan?
On Cefiro A32 You can install motors from the following models:
- Nissan Maxima A32 (1995–1999) - complete analogue, article number
27350-4M000. - Nissan Laurel C34 (1997–2002) - requires minor modification of the connector.
- Infiniti I30 (1996–1999) - identical in mounts, but may differ in the shape of the blades.
Before purchasing, check the connector and dimensions!
How much does it cost to replace a heater motor at a service center?
The cost of working in a car service depends on the region:
- Moscow/St. Petersburg: 3,000–5,000 ₽.
- Regions: 1,500–3,000 ₽.
Self-replacement will only cost the price of the spare part (from RUB 2,000 for an analogue). The main difficulty is access to the motor, but with a careful approach there will be no problems.
What to do if the new motor is noisy?
Noise after replacement can occur for several reasons:
- Incorrect installation — check whether the blades touch the snail body.
- Rejected spare parts - especially common among budget analogues. Try returning the motor under warranty.
- Debris ingress - clean the snail and blades from dust and leaves.
- Bearing wear - if the noise sounds like a squeal, lubricate the bearings or replace the motor.
If the noise does not go away, record it on video and show it to the seller - this will help prove the defect.