Nissan Almera G15 power steering sensor: how to check and replace

Nissan Almera G15 is a popular sedan that is valued for its reliability and unpretentiousness. However, even in this model, problems with the power steering system (power steering) may arise over time. One of the weak points is steering angle sensor (or torque sensor on the steering wheel), which is responsible for the correct operation of the power steering electronics. Its malfunction leads to heavy steering, errors on the dashboard and even complete failure of the amplifier.

In this article we will look at how independently diagnose a faulty power steering sensor on Almera G15, what symptoms indicate its failure, and is it possible to do without replacement. We will also provide step-by-step instructions for dismantling, prices for original and similar spare parts, and answers to frequently asked questions from owners. If you notice that the steering wheel has become stiff or the EPS - this information will be especially useful.

What is a power steering sensor and how does it work in Nissan Almera G15

B Nissan Almera G15 (2012–2019) in use electro-hydraulic power steering (EHPS), where the rotation angle sensor plays a key role. It is located in steering column and performs two main functions:

• 📊 Measures steering angle and speed — transmits data to the power steering control unit to adjust the force.
• ⚡ Controls power steering pump current — when turning sharply, it increases oil pressure, making the steering wheel lighter.
• 🚨 Activates an error signal — if the sensor data does not meet the standards, the light on the device lights up EPS or P/S.

Unlike the classic power steering with a belt drive, in Almera G15 the pump is controlled electronically, so the sensor here is more vulnerable to voltage surges and mechanical damage. For example, after an accident or careless repair of the steering column, it may fail even if it is visually intact.

It is important to understand that the sensor works in tandem with power steering control unit (ECU). If the problem is in the block, replacing the sensor will not help - complex diagnostics will be required. In practice, in 70% of cases it is the sensor, not the electronics, that is to blame.

Symptoms of a faulty power steering sensor on a Nissan Almera G15

Symptoms of a broken steering angle sensor are often confused with a faulty power steering pump or belt. However there is characteristic features, which directly point to the sensor:

• 🔴 The light is on EPS or P/S - Appears when starting the engine or while driving.
• 💪 The steering wheel gets heavy at low speeds - especially noticeable when parking or maneuvering.
• ⚡ Sharp jerks of the steering wheel — the amplifier either works or turns off (symptom of “jerking”).
• 🔄 Spontaneous turning of the steering wheel — the car “pulls” to the side without pressing the gas pedal.
• 📉 Error C1130 or C1611 - lights up when scanning OBD-II (connected to angle sensor).

If the steering wheel becomes heavy only at idle, the problem is most likely in the pump or low power steering fluid level. But if the amplifier turns off when moving (for example, at a speed of 40–60 km/h), the sensor or control unit is to blame.

⚠️ Attention: If the dashboard lights up EPS and the steering wheel became tight, don't ignore the problem - this may lead to loss of control at high speed. It is especially dangerous if the symptom occurs when turning left (a common problem Almera G15 due to the design of the sensor).

How to check the power steering sensor on a Nissan Almera G15

The sensor can be diagnosed three ways: visually, using a scanner and multimeter. Let's start with the simplest thing - inspection.

1. Visual inspection

The sensor is located under the steering column, next to power steering control unit. To get to it:

1. Remove the lower plastic trim under the steering wheel (unscrew the 2 bolts T20).
2. Find the sensor connector - it is connected to the wiring harness with the chip 3-pin.
3. Check the integrity of the wires and the absence of oxidation on the contacts.

If the connector has green coating or traces of corrosion, clean the contacts with alcohol. Sometimes this solves the problem without replacing the sensor.

2. Diagnostics with OBD-II scanner

Connect the scanner (for example, ELM327 or Launch CReader) to the connector OBD-II (located under the steering wheel on the left). Look for errors:

• C1130 — malfunction of the rotation angle sensor.
• C1611 — loss of signal from the sensor.
• U1000 — problems with communication between blocks (may indicate a wiring break).

If there are no errors, but the symptoms persist, check the sensor with a multimeter.

3. Check with a multimeter

To do this:

1. Disconnect the sensor chip.
2. Set the multimeter to mode resistance (200 Ohm).
3. Measure the resistance between the contacts 1–2 And 2–3 (must be 1.5–2.5 kOhm).
4. Turn the steering wheel - the resistance should be change smoothly no jumps.

If resistance infinite or equal to 0, the sensor is faulty. Also a sign of failure - jumps in readings when turning the steering wheel.

Check for errors with an OBD-II scanner|

Inspect the sensor connector for corrosion|

Measure the resistance with a multimeter|

Make sure the problem is not in the power steering control unit -->

Step-by-step instructions for replacing the power steering sensor on a Nissan Almera G15

If the diagnostics confirm that the sensor is faulty, it must be replaced. On Almera G15 you can do this yourself for 1–1.5 hours without special tools.

Required tools:

• 🔧 Set of socket heads (10 mm, 12 mm).
• 🔩 Screwdriver T20 (to remove the cover).
• 🔌 Flat screwdriver (for connector clamps).
• 🧲 Magnet (so as not to lose the bolts).

Step by step process:

1. Disconnect the battery (remove the negative terminal).
2. Remove the lower steering column pad (2 bolts T20).
3. Disconnect the sensor connector (press the lock and pull down).
4. Unscrew the 3 sensor mounting bolts (head 10 mm).
5. Remove the old sensor and install a new one (follow the marks on the case).
6. Connect the connector and reassemble everything in reverse order..

After replacement be sure to clear errors through a scanner or by disconnecting the battery for 10 minutes. If the light bulb EPS remains on, check the sensor calibration (sometimes it is necessary to reset adaptations through diagnostic equipment).

⚠️ Attention: When installing a new sensor don't make any effort to the connector - the contacts are fragile. If the chip does not insert, check the alignment of the pins. Also avoid turning the steering wheel with the sensor disabled - this may throw off the calibration.

Cost of power steering sensor and replacement in service

The price of the sensor depends on the manufacturer and place of purchase. Below is a table with current offers for Nissan Almera G15 (for 2026):

Manufacturer	Article	Price, ₽	Notes
Nissan (original)	40520-4M000	8 500–12 000	12 month warranty, fully compatible
Hitachi	40520-4M00A	5 000–7 000	High-quality analogue, often installed in services
Febi	40520	3 500–4 500	Budget option, possible problems with calibration
Blue Print	ADG02401	4 200–5 500	Good price/quality ratio

Cost of replacement work in the service:

• 🔧 Official dealer — 3,000–5,000 ₽ (with diagnostics).
• 🔧 Unofficial service — 1 500–2 500 ₽.
• 🔧 Self-replacement — 0 ₽ (except for the cost of the sensor).

If you decide to change the sensor yourself, buy only from trusted suppliers - there are many fakes on the market under the brand Hitachi. Original sensor Nissan costs more, but will last longer (resource - 150-200 thousand km).

Common mistakes when replacing a power steering sensor and how to avoid them

Even experienced car owners make mistakes when replacing the sensor, which lead to repeated breakdowns. Here the most common mistakes and how to prevent them:

• 🔌 Incorrect connector connection - if you mix up the contacts, the sensor will burn out. Always refer to the markings on the body.
• 🔧 Tightening the mounting bolts - this deforms the sensor body. Tighten firmly 8–10 Nm.
• 📱 Ignoring calibration — after replacement, the sensor needs to be “trained”. To do this, turn the steering wheel all the way left and right with the ignition on.
• 🚗 Turning the steering wheel with the sensor disabled - this throws off the zero point, and the new sensor will not work correctly.

Another common mistake is purchasing a sensor without checking the article number. For example, on Almera G15 before 2015 a sensor was installed 40520-4M000, and after - 40520-4M00A. They look similar, but have different firmware. Specify the vehicle's VIN when ordering!

⚠️ Attention: If after replacing the sensor the light bulb EPS remains on, but the steering wheel works fine, don't panic - sometimes the error is reset only after 2-3 ignition switching cycles. If the problem persists, check the power steering control unit.

Alternative solutions: repair or bypass the sensor

If the sensor has failed and a new one is not available, you can consider temporary solutions:

• 🔧 Sensor repair - some workshops resolder contacts or clean the board. Cost: 2,000–3,000 rubles. However this not reliable — after 10–20 thousand km the problem will return.
• 🔌 Sensor bypass (emulator) - connecting a resistor instead of a sensor to fool the control unit. Danger! The steering wheel will become heavier, and the power steering system will work in emergency mode.
• 📱 Firmware for power steering unit — in some cases, resetting adaptations through diagnostic equipment helps (for example, Launch X431). Cost: 1,500–2,500 rubles.

The best solution is replacement with a new sensor. Bypass or repair is justified only in emergency cases (for example, on the road). Remember that disconnecting the sensor leads to loss of warranty on the power steering and increases the risk of an accident due to unstable operation of the amplifier.

What happens if you drive with a faulty power steering sensor?

Long-term operation with a non-functioning sensor leads to:

1. Power steering pump overheating — due to incorrect signals, it operates at maximum power, which reduces its resource.

2. Steering rack wear — increased load on the mechanism accelerates the failure of bushings and oil seals.

3. Loss of control — at high speed, the steering wheel may “jam” or become too light, which can lead to an accident.

4. Locking the power steering system — the control unit can completely turn off the amplifier, and the steering wheel will become like in Zhiguli (force 15–20 kg).

FAQ: Frequently asked questions about the power steering sensor Nissan Almera G15

Is it possible to drive with the EPS light on?

Short term - yes, but not recommended. If the light bulb EPS lights up constantly, the power steering is in emergency mode or disabled. This is dangerous, especially at high speed. Check the sensor and power steering control unit as soon as possible.

How to reset the EPS error after replacing the sensor?

There are three ways:

1. Disconnect the battery for 10–15 minutes.
2. Use a scanner OBD-II (For example, ELM327) to reset errors.
3. Turn the steering wheel all the way left and right with the ignition on (calibration).

If the error does not clear, the problem may be in the control unit.

How long does the power steering sensor last on Almera G15?

Service life of the original sensor - 150–200 thousand km. However, it may fail earlier due to:

• moisture getting into the connector;
• short circuit in the on-board network;
• mechanical damage (for example, after an accident).

Analogs last less - 80-100 thousand km.

Is it possible to replace the power steering sensor yourself if you have no experience?

Yes, replacing the sensor with Almera G15 - one of the simplest procedures. The main thing:

• follow the marks during installation;
• do not apply force to the connector;
• reset errors after replacement.

If in doubt, watch the video instructions at YouTube (for example, channel "Nissan Almera Club").

What is the difference between the 40520-4M000 and 40520-4M00A sensors?

These are interchangeable sensors, but with different firmware:

• 40520-4M000 - original Nissan, installed on cars until 2015.
• 40520-4M00A - analogue from Hitachi, suitable for all model years, but may require calibration.

If you're not sure, take it 40520-4M00A - it is more universal.