Rear left wheel ABS sensor on <em>Nissan Almera Classic</em>: symptoms of malfunction and replacement

Nissan Almera Classic (also known as Nissan Sunny B10 in some markets) is a reliable car, but even its ABS system elements fail over time. One of the most vulnerable rear left wheel ABS sensor. Failure to do so not only disables the anti-lock braking system, but can also mask problems with the brakes or bearings. In this article we will look at how to diagnose a breakdown, select a spare part and replace the sensor yourself - without contacting service.

Feature Almera Classic is that its rear ABS sensors often suffer from corroded connectors or broken wiring due to their close location to the wheel arches. In this case, an error appears on the dashboard (ABS or BRAKE) does not always point specifically to the sensor - sometimes the control unit itself is to blame. We will help you figure out when the problem is definitely in the sensor, and when it’s worth digging deeper.

Symptoms of a malfunctioning rear left wheel ABS sensor

The first and most obvious symptom is ABS light on on the dashboard. However, this may indicate other problems in the system. About the malfunction rear left sensor the following signs indicate:

• 🔴 Lamp ABS lights up only when moving (especially at speeds above 20–30 km/h) and goes out when parked.
• 🚗 When braking on a slippery surface, the wheel is blocked (there is no characteristic vibration of the brake pedal).
• 📊 Diagnostic scanner shows error C1130 (sensor circuit open) or C1135 (incorrect signal).
• 🔧 After replacing the wheel bearing or brake disc, an ABS error appeared.

Important: if the lamp ABS lights up constantly, and the scanner gives errors on several wheels at the same time, the problem may be ABS control unit or fuses. In this case, the rear left wheel sensor most likely has nothing to do with it.

⚠️ Attention! On Nissan Almera Classic with engines QG15DE And QG16DE (1.5/1.6 L) rear wheel ABS sensors have different wire lengths for left and right side. Make sure you are purchasing the sensor specifically for left wheels - otherwise the connector will not reach the control unit.

Articles and analogues of the ABS sensor for Nissan Almera Classic

Original rear left wheel ABS sensor for Almera Classic (body B10, 2006–2012) has an article number 40520-4M000 or 40520-4M00A. However, the original is expensive (from 3,500 rubles), so many choose analogues:

Manufacturer	Article	Price (RUB)	Features
Bosch	0 265 004 757	1 800–2 200	Best price/quality ratio, fits without modifications
Febi Bilstein	21630	1 500–1 900	Budget option, sometimes requires crimping the connector
TRW	GDA340	2 300–2 800	High quality, but there are fakes
Sasic	2101001	1 200–1 500	Low price, but the resource is less than the original

When purchasing an analogue, pay attention to:

• 🔌 Connector type - must be identical to the original (2 contacts, rectangular).
• 📏 Wire length — for the left wheel you need a version with a wire ~50 cm (the right wheel is shorter).
• 🛠️ Availability of O-ring — without it, the sensor will quickly rust.

ABS sensor diagnostics: how to check without a scanner

If you don't have a diagnostic scanner (for example, ELM327 or Launch CReader), you can check the sensor with a multimeter. To do this:

1. Jack up the rear left wheel and remove it.
2. Disconnect the sensor connector (it is located on the strut next to the spring).
3. Set the multimeter to mode resistance measurements (Ω).
4. Connect the probes to the sensor contacts (polarity is not important).

Normal indicators for a working sensor:

• 📊 Resistance: 800–1400 Ohm (at Almera Classic usually ~1000 Ohm).
• 🔄 When the wheel rotates The resistance should remain stable (if it jumps, the sensor is faulty).
• 🔋 Continuity to ground: between any contact and the sensor body, the resistance should tend to infinity (open circuit).

If the resistance is 0 ohm (short circuit) or ∞ (break), the sensor must be replaced. Also check the integrity of the wiring from the connector to the ABS unit - the insulation of the wheel arch is often frayed.

Step-by-step instructions for replacing the ABS sensor

Replacing the sensor with Nissan Almera Classic does not require special tools, but will require care - especially when working with the fragile plastic sensor housing. You will need:

• 🔧 Key on 10 mm (for the sensor mounting bolt).
• 🔨 Flat screwdriver (for prying off the connector).
• 🧴 Penetrating lubricant (WD-40 or Liqui Moly).
• 🧲 Magnet (so as not to drop the bolt into the wheel arch).

Step 1. Removing the old sensor

The sensor mounting bolt often gets stuck - do not try to unscrew it by force, otherwise you will tear off the head. Apply lubricant generously and wait 5-10 minutes. Then:

1. Carefully unscrew the bolt with a wrench 10 mm (keep a magnet nearby!).
2. Pry up the sensor with a screwdriver and remove it from the hub. Be careful - the plastic case may crack.
3. Check the condition of the O-ring on the hub. If it is torn or hardened, replace it (article number 40528-4M000).

Step 2: Install a new sensor

Before installation, clean the seat from dirt and rust. Insert the new sensor straight, without distortions - otherwise the seal will be leaky. Tighten the bolt firmly 8–10 Nm (do not overtighten!).

Step 3. Check after replacement

After installation:

1. Connect the sensor connector (you should hear a click).
2. Install the wheel and lower the car.
3. Start the engine and drive 5–10 km at a speed above 40 km/h - lamp ABS should go out.

⚠️ Attention! If after replacing the sensor the lamp ABS continues to burn be sure to check fuse F35 (10A) in the fuse box under the hood — it is responsible for powering the ABS unit. On Almera Classic This fuse often blows when there is a short circuit in the sensor circuit.

Common replacement mistakes and how to avoid them

Even experienced car owners make mistakes that lead to repeated sensor failure or other problems. Here are the most common:

• 🔧 Tightening the fastening bolt → a crack in the sensor housing or a thread break in the hub. Solution: Use a torque wrench (max. 10 Nm).
• 🔌 Incomplete connector connection → oxidation of contacts and false errors. Solution: After connecting, pull the connector towards you - it should not come off.
• 🚗 Ignoring the O-ring → moisture ingress and corrosion. Solution: Always change the ring together with the sensor.
• 📊 Buying a sensor for the right wheel → the wire is not long enough. Solution: Check the part number to match the side (left/right).

Another typical problem is wiring damage when removing a wheel or brake drum. On Almera Classic ABS sensor wires run close to metal suspension elements and often fray. Always check the insulation along the entire length of the wire!

What should I do if, after replacing the ABS sensor, the light is still on?

If the sensor is new, but the error remains, the reasons may be as follows:

1. ABS control unit is faulty (article 40500-4M000).

2. Damaged wiring between the sensor and the unit (check with a multimeter).

3. Contacts in the ABS unit connector are oxidized (located under the hood, next to the vacuum booster).

4. Errors not cleared — sometimes it is necessary to erase codes with a scanner (even if the problem is resolved).

Service replacement cost vs. do-it-yourself repair

Prices for replacing an ABS sensor in services vary depending on the region and service station level:

Service type	Cost of work (rub.)	Cost with spare part (RUB)	Opening hours
Official dealer Nissan	2 500–3 500	6,000–9,000 (with original sensor)	1–1.5 hours
Independent service	1 200–2 000	3,000–4,500 (with analogue)	40–60 minutes
Self-replacement	0	1,200–2,800 (spare part)	1–2 hours (with preparation)

The savings when replacing yourself are obvious, but consider the risks:

• ⚠️ Hub damage when unscrewing the bolt (if it is stuck).
• ⚠️ Incorrect installation, leading to repeated breakdown.
• ⚠️ Lack of diagnostic equipment to reset errors.

If you are not confident in your skills, it is better to entrust the work to professionals - especially if we are talking about an original sensor. In the event of an installation error, the warranty for the spare part does not apply.

Prevention: how to extend the life of the ABS sensor

ABS sensors on Nissan Almera Classic rarely last more than 100,000 km, but their service life can be increased by following simple rules:

• 🚿 Washing wheel arches in winter - salt and reagents corrode the sensor seals. Use Karcher with a nozzle for hard-to-reach places.
• 🔧 Regular check of connectors - clean contacts from oxidation at least once a year (for example, Kontakt 61).
• 🛠️ Be careful when repairing suspension — Do not pull the sensor wires when removing the brake drum or shock absorber.
• 📊 Diagnosis at the first signs - if the lamp ABS lights up periodically, do not delay checking.

Pay special attention wheel bearing condition. On Almera Classic a worn bearing can “eat” the ABS sensor - vibrations destroy its housing. If you hear a hum when the wheel rotates, replace the bearing (article number 40520-4M025) together with the sensor.

FAQ: Frequently asked questions about the ABS sensor on Nissan Almera Classic

Is it possible to drive with a faulty ABS sensor?

Yes, but with reservations:

• The brakes will work, but without an anti-lock system - the wheel may lock on a slippery road.
• On some versions Almera Classic turns off also Brake force distribution (EBD), which worsens braking.
• During maintenance, a faulty lamp ABS may cause refusal to issue a diagnostic card.

Recommendation: If the sensor fails in winter, replace it as soon as possible. In summer, you can temporarily drive without ABS, but do not put off repairs for too long.

How to reset the ABS error after replacing the sensor?

On Nissan Almera Classic The ABS error is reset automatically after 3–5 km of driving at a speed above 40 km/h. If the lamp does not go out:

1. Check the connection of the sensor connector.
2. Make sure the new sensor is working properly (check with a multimeter).
3. If the error persists, use a diagnostic scanner (for example, Launch X431) for a forced reset.

On some versions Almera Classic You can reset the error by disconnecting the battery terminal for 10 minutes, but this does not always work.

What is the difference between ABS sensors for the left and right wheels?

On Nissan Almera Classic The rear wheel sensors are identical in design, but have different wire lengths:

• Left wheel: wire ~50 cm (article 40520-4M000).
• Right wheel: wire ~30 cm (article 40521-4M000).

If you put the sensor for the right wheel on the left, the connector will not reach the control unit. Pay attention to the labeling when purchasing!

Can the ABS sensor be repaired or is it just a replacement?

The ABS sensor is a non-repairable part. However, in some cases you can restore its functionality:

• 🔧 Cleaning contacts - if the problem is oxidation of the connector.
• 🧲 Soldering wires — if the sensor wire is broken (but only if the sensor itself is intact).
• 🚫 Not repairableif the magnetic core or housing is damaged.

In 90% of cases, it is easier and more reliable to replace the sensor with a new one. Repair is justified only as a temporary solution.

Where is the ABS control unit located on Nissan Almera Classic?

The ABS control unit is located under the hood, on the side member on the driver's side, next to the vacuum brake booster. To access it:

1. Remove the air filter (unscrew the 3 bolts with a wrench 10 mm).
2. Disconnect the unit connector (black, 25 pins).
3. Unscrew the 2 bolts securing the block with a key on 12 mm.

There should be a sticker with the article number on the block 40500-4M000 or 40500-4M00A. When replacing the unit you will need registration in the engine ECU (done only with diagnostic equipment).