Reverse sensor <em>Nissan Almera N16</em>: signs of breakdown, checking and replacing yourself

Nissan Almera N16 - a popular sedan of the early 2000s, which is still actively used on the roads of the CIS. One of the common problems with this car is that it doesn't work. reverse sensor (DZH), which is responsible for turning on the white lights when moving backwards and transmitting the signal to the on-board computer. If, when you engage reverse gear, the lamps do not light up, and an error appears on the dashboard, most likely this small but important element is to blame.

In this article we will figure out how diagnose a malfunction of the reverse sensor on Almera N16, where it is located, how to check it with a multimeter, and whether it is possible to replace it yourself without visiting a service station. We will also compare original spare parts with analogues, consider typical mistakes during replacement and give advice on extending the service life of a new sensor.

Where is the reverse sensor located on Nissan Almera N16?

Reverse sensor on Almera N16 (as on most cars with manual transmission) installed on the gearbox. The exact location depends on the type of transmission:

• 🔧 On manual transmission — the sensor is screwed into the upper part of the box housing, closer to the rear of the car. It is easily identified by the two wires going to the connector.
• ⚙️ On automatic transmission — the location is similar, but access to the sensor may be difficult due to additional elements (for example, an automatic transmission pan).

To get to the DZH, you will need remove engine protection (if installed) and possibly disconnect some of the pipes or wiring harnesses. On some modifications Almera N16 the sensor may be hidden under a thermal shield or other elements, so before starting work it is recommended to clean the area around the box from dirt.

⚠️ Attention: On cars with automatic transmission, before replacing the reverse sensor be sure to drain some of the oil (about 1-1.5 liters), since when unscrewing the DZH it may leak out. Use only recommended gear oil Nissan Matic Fluid D for topping up.

Symptoms of a faulty reverse sensor

The main symptom of a DZH failure is no taillights when engaging reverse gear. However, this is not the only sign. Here is a complete list of symptoms that may indicate a problem:

• 🚨 The white reverse lights do not light up (the lamps are working properly).
• 🔄 Lights up on the dashboard Check Engine or error P0705 (gear sensor circuit malfunction).
• 📉 The on-board computer does not recognize the engagement of reverse gear (on some versions Almera N16 this affects the operation of parking sensors).
• 🔌 Periodic flickering lights reverse gear when vibrating or driving over uneven surfaces.

It is important to distinguish sensor failure from other problems:

• 💡 If they don’t light up all tail lights (including brake lights), the problem may be in the fuse F10 (10A) or relay.
• 🔌 If only one lamp does not work, check its circuit or the light bulb itself.
• 📡 If the panel lights up Check Engine, but the lights work, the problem may be in the wiring or sensor connector.

How to check the reverse sensor with a multimeter?

Before replacing the sensor, it must be diagnose. To do this, you will need a multimeter in resistance test mode (200 Ohm) or calls. Follow the instructions:

1. Remove the connector from the sensor. On Almera N16 it is fixed with a plastic latch - carefully press it out with a screwdriver.
2. Check the circuit between connector contacts:
   • 🔋 When reverse gear engaged the resistance between the contacts should be 0 ohm (short circuit).
   • 🔌 When neutral gear resistance should tend to infinity (open circuit).
3. Check the sensor itself:
   • 🔧 Unscrew the sensor from the box (the key is on 22 mm).
   • 📊 Connect the multimeter probes to the sensor contacts and repeat the resistance check when simulating reverse gear engagement (for example, pressing the sensor rod).

If the sensor does not show 0 ohm when you press the rod, it faulty and requires replacement. Also check the integrity of the wiring from the sensor to the fuse box - often the problem lies in frayed or oxidized wires.

Check fuse F10 (10A)|Disconnect the sensor connector and check the contacts for oxidation|Measure the resistance of the sensor with a multimeter|Check the wiring from the sensor to the fuse box|Make sure the reverse lamps are working-->

Original sensor vs analogues: what to choose for Almera N16?

When replacing the DZH with Nissan Almera N16 can be installed as original spare part, and analogues from third-party manufacturers. Below is a comparison table with items, prices and features:

Sensor type	Article	Manufacturer	Price (RUB)	Features
Original	39300-4M000	Nissan	1 800–2 500	Guaranteed compatibility, long service life, but high price.
Analogue	SWAG 30 93 3004	SWAG (Germany)	800–1 200	High-quality assembly, suitable for most Japanese cars.
Analogue	ERA 550.432	ERA (Italy)	600–900	Budget option, possible problems with tightness.
Analogue	FEBI 39300	Febi Bilstein	1 000–1 400	Good quality, but there are fakes.

Important: On Almera N16 With automatic transmission, the reverse sensor is integrated into the solenoid block and is not sold separately. In this case, the entire unit must be replaced (article no. 31397-4M000, price from 8,000 rub.).

When choosing an analogue, pay attention to:

• 🔍 Housing material - must be metal (aluminum or brass), not plastic.
• 🔌 Connector type - on Almera N16 A two-pin connector with a locking mechanism is used.
• 🛡️ Tightness — the sensor must have a rubber sealing ring.

Step-by-step instructions for replacing the reverse sensor

Replacing the DZH with Nissan Almera N16 with manual transmission it takes no more than 30 minutes. To work you will need:

• 🔧 Key on 22 mm (or head with extension).
• 🔌 Screwdriver with a flat blade (for removing the connector).
• 🧴Sealant Loctite 577 (to seal the thread).
• 🧤 Gloves (gearbox may be dirty).

Procedure:

1. Preparation:
   • 🅿️ Drive the car onto a pit or overpass.
   • 🔌 Disconnect the negative terminal of the battery.
   • 🛠️ Remove the engine protection (if any).
2. Removing the old sensor:
   • 🔌 Disconnect the power connector from the sensor.
   • 🔧 Key on 22 mm unscrew the sensor counterclockwise. Be careful - some oil may leak out of the hole.
3. Installing a new sensor:
   • 🧴 Apply a thin layer of sealant to the threads of the new sensor.
   • 🔧 Screw the sensor into the box all the way (do not overtighten!).
   • 🔌 Connect the connector.
4. Check:
   • 🔋 Connect the battery.
   • 🚗 Turn on reverse gear - the lights should light up.
   • 📊 Make sure there are no errors on the instrument panel.

⚠️ Attention: If, after replacing the sensor, the reversing lights still don't work, check:

• 🔌 Fuse integrity F10 (10A) in the fuse box (located under the steering wheel).
• 📡 Condition of the contacts in the sensor connector - they may oxidize.
• 💡 Serviceability of reverse lamps (burnt-out lamps are a common cause of false positives).

What to do if the sensor does not screw in all the way?

If the new sensor does not screw in or is tight, there are two possible reasons:

1. **Thread contamination** - clean the hole in the box with a wire brush.

2. **Thread mismatch** - some analogues have a slightly different thread pitch. In this case, you will need a tap to cut a new thread (step 1.25 mm).

Typical mistakes when replacing a reverse sensor

Even such a simple operation as replacing a DZH can turn into problems if mistakes are made. Here are the most common of them:

• 🔧 Dragging the sensor - may damage the threads in the box. The tightening torque should not exceed 20–25 Nm.
• 🧴 Lack of sealant - without a seal, oil will seep into the hole, and the sensor will quickly fail.
• 🔌 Incorrect connector connection — the contacts must engage until they click. If the connector is not seated tightly, false alarms are possible.
• 💡 Ignoring lamp checks — owners often change the sensor without checking that the lamps have simply burned out.

Another common mistake is buying a sensor without an o-ring. On cheap analogues it may be absent, which will lead to oil leakage. If the ring is not included in the kit, it can be purchased separately (item number 39306-4M000).

How to extend the life of the reverse sensor?

Reverse sensor on Almera N16 does not apply to “consumables”, but its service life depends on operating conditions. To avoid premature failure, follow the recommendations:

• 🚿 Avoid driving through deep puddles — water getting on the sensor connector causes corrosion of the contacts.
• 🧴 Clean the gearbox regularly from dirt, especially in the sensor area.
• 🔧 Check for leaks — if traces of oil appear around the sensor, tighten it or replace the seal.
• 🔌 Process contacts connector with special lubricant (for example, Liqui Moly Electronic-Spray).

It is also worth paying attention to gearbox oil quality. On Almera N16 recommended for use with manual transmission Nissan MT-XZ Fluid or analogues (Motul Gear 300, Castrol Syntrans Transaxle 75W-90). Oil change every 60,000 km will reduce the load on the sensor and extend its service life.

FAQ: Frequently asked questions about the reverse sensor Nissan Almera N16

Is it possible to drive without a reverse sensor?

Technically yes, but this unsafe. Without working reverse lights, other drivers will not be able to react to your maneuver in time. In addition, on some versions Almera N16 a non-functioning sensor may block the rear view camera from turning on (if installed).

Why do the lights stay on constantly after replacing the sensor?

This indicates contact closure in the sensor or wiring. Check:

• The sensor is installed correctly (the rod may be recessed and the contacts are closed).
• Integrity of wire insulation from the sensor to the fuse box.

Which fuse controls reverse gear? Almera N16?

The reversing light circuit is controlled by a fuse. F10 (10A) in the fuse box located under the steering wheel. Also check the relay K1 (headlight relay), which can affect the operation of the rear lights.

Is it possible to repair the reverse sensor?

In most cases the sensor beyond repair, since its body is sealed. However, if the problem is oxidized contacts, they can be cleaned with sandpaper (P1000). If the mechanism itself is faulty (for example, the rod is broken), the sensor must only be replaced.

Where to buy a reverse sensor for Almera N16?

Original and similar sensors can be purchased:

• 🛒 At official dealerships Nissan (quality guarantee, but high price).
• 🌍 In aftermarket markets (e.g. Exist.ru, Autodoc).
• 🏪 In auto parts stores (check the article number before purchasing!).

Shipping costs from Europe (e.g. Amazon or eBay) often exceeds the price of the sensor itself, so purchasing from local suppliers is more profitable.