Nissan 31726-28X0A: what is this part, where is it used and how not to run into a fake

Article Nissan 31726-28X0A often found in spare parts catalogs, but not all car owners understand what exactly is hidden behind this combination of numbers and letters. This part belongs to the category electrical components and is used in engine control systems, transmission or on-board electronics - depending on the car model. The main problem is that original spare parts Nissan are often counterfeited, and analogues from third-party manufacturers may have critical differences in quality.

In this article we will look at which specific models Nissan intended article 31726-28X0A, how to correctly identify it, what analogues exist on the market and what to look for when purchasing. You will also learn how to distinguish an original from a counterfeit part and what symptoms indicate its malfunction. The information will be useful to both owners Nissan Qashqai, X-Trail And Navara, and those who professionally repair Japanese cars.

What is Nissan 31726-28X0A: technical description

Article 31726-28X0A stands for relay or control unit, which is part of the system ECU (Engine Control Unit) or auxiliary electrical circuits. Depending on the year of manufacture and model of the car, this part can perform different functions:

• 🔌 Fuel pump relay — controls the voltage supply to the fuel pump, ensuring stable pressure in the system.
• ⚡ Ignition module — participates in the formation of a spark in the cylinders (relevant for gasoline engines).
• 📡 Cooling fan control unit — regulates the operation of electric radiator fans.
• 🔄 Starter relay — is responsible for turning on the starter when turning the ignition key.

The exact purpose of the part can be determined by Vehicle VIN code or through specialized spare parts catalogs, such as Nissan Parts Catalog or ETIM. For example, in Nissan Qashqai J10 (2007–2013) this part number often corresponds to the fuel pump relay, and in Navara D40 — fan control module.

It is important to consider that 31726-28X0A may have different modifications depending on the region of delivery of the vehicle. For example, parts for the European and Japanese markets sometimes differ in electrical parameters (voltage, current). Therefore, before purchasing, you need to check with car wiring diagram or use online VIN matching services.

Compatibility with Nissan models: complete list

Detail 31726-28X0A installed on several generations of cars Nissan, but its exact applicability depends on the year of manufacture and engine type. Below is a compatibility table compiled based on data from official catalogs and car service reports:

Model	Years of manufacture	Engine type	Purpose of the part
Nissan Qashqai J10	2007–2013	Gasoline 1.6/2.0, diesel 1.5/2.0	Fuel pump relay
Nissan X-Trail T31	2007–2013	Gasoline 2.0/2.5, diesel 2.0	Fan control module
Nissan Navara D40	2005–2015	Diesel 2.5/3.0, gasoline 2.5/4.0	Starter relay or ECU
Nissan Pathfinder R51	2005–2012	Gasoline 3.5, diesel 2.5/3.0	Fuel pump relay
Nissan Almera N16	2000–2006	Gasoline 1.5/1.8	Ignition module

Please note: in some cases the article number 31726-28X0A can be replaced by 31726-28X0B or 31726-28X0C - These are modifications of the same part with minor changes in design. For example, in Nissan X-Trail T32 (2014–2021) an updated version of the relay is already used, but it is backward compatible with previous generations.

⚠️ Attention: If you are purchasing a part for Nissan with diesel engine, check whether additional adaptation of the control unit is required. For example, in Navara D40 with motor YD25DDTi The fuel pump relay may have a different operating algorithm than in gasoline versions.

Symptoms of part 31726-28X0A failure

Relay or module failure 31726-28X0A manifests itself differently depending on its function. General symptoms that should alert you:

• 🚗 Engine won't start - if the part is responsible for the fuel pump or starter, the car may not respond to turning the key.
• ⚡ Electrical interruptions — flashing of the dashboard, spontaneous shutdown of fans or headlights.
• 🔥 Engine overheating — if the cooling fan does not work, the antifreeze temperature will rise even at idle.
• 🛑 Errors on the dashboard - for example, P0300 (misfire) or P0171 (lean mixture) if the problem is in the fuel system.

For accurate diagnosis, it is recommended to check the part with a multimeter. For example, if 31726-28X0A - this is a relay, it can be ringed in resistance mode:

1. Remove the relay from its seat.
2. Connect the multimeter probes to the contacts 85 And 86 (coil). Resistance must be within 50–120 Ohm.
3. Apply voltage 12 V to contacts 85 And 86 — there should be a click (activation).
4. Check the resistance between 30 And 87 - in a closed state it should be close to 0 ohm.

⚠️ Attention: If the relay clicks, but the output voltage (87) is missing, this indicates burnt contacts. In this case, the part must be replaced, even if it visually appears to be in good working order.

Ring the coil (pins 85–86)

Check operation when 12 V is supplied

Measure resistance between 30–87 in closed state

Inspect the contacts for oxidation or carbon deposits.

Check the article number with the original markings -->

Original vs analogues: what to choose?

Original part Nissan 31726-28X0A costs on average 1,500–3,000 rubles depending on the supplier. However, there are analogues on the market from well-known brands that may be cheaper by 30–50%. Below is a comparison of popular substitutes:

Manufacturer	Analog article	Price, rub.	Features
Bosch	0 332 014 150	1 200–1 800	High quality contacts, suitable for diesel engines
Hella	4RA 003 409-131	1 000–1 500	Universal relay, may require modification of the seat
Meat & Doria	88300	800–1 200	Budget option, short service life
Febi Bilstein	11670	1 300–1 900	Good compatibility with Nissan Qashqai And X-Trail

Critical moment: analogues from Meat & Doria and other budget brands often have a simplified contact design, which leads to their burning after 10–15 thousand kilometers. If you choose a non-original part, give preference Bosch or Hella - they will last longer.

When purchasing an original, pay attention to:

• 📦 Packaging - there must be a branded box Nissan with a hologram.
• 🏷️ Marking — the item number must be engraved on the part 31726-28X0A and the manufacturer's logo.
• 🔍 Contacts — the original has a matte finish without traces of soldering.

Where can I buy original part 31726-28X0A?

Purchase an original relay or module Nissan 31726-28X0A possible through several channels:

1. Official dealers Nissan - guaranteed to be original, but the price may be inflated by 20–30%.
2. Specialized online stores:
   • 🌍 Nissan Parts Online - official catalog with delivery.
   • 🛒 JP Car Parts — deliveries directly from Japan.
   • 📦 Amayama - original and OEM spare parts.

Auto parts markets - for example, AvtoVAZ in Moscow or Highway Enthusiasts, but there is a high risk of running into a fake.

Used parts - on Avito or in breakout groups. A risky option, since there is no guarantee of performance.

Average prices for the original by regions of Russia (for 2026):

• 📍 Moscow and region: RUB 1,800–2,500
• 📍 St. Petersburg: RUB 1,900–2,600
• 📍 Regions (Siberia, Urals): 2,000–3,000 rub. (including delivery).

⚠️ Attention: When ordering from Japan (such as via Amayama) check whether the part requires adaptation to European standards. Some relays have different contact polarities.

💡

Buy original parts only from trusted sellers with a rating of at least 4.8. Counterfeits often imitate packaging, but have lower quality plastic and contacts.

Replacing a part yourself: step-by-step instructions

Replace relay or module 31726-28X0A you can do it yourself if it is located in an accessible place (for example, in the fuse box under the hood or in the passenger compartment). For this you will need:

• 🔧 Screwdriver with a flat blade (for removing the block cover).
• 🔌 Multimeter (to check voltage).
• 🧤 Gloves (so as not to damage the contacts).

Replacement algorithm (for example Nissan Qashqai J10):

1. Disable negative battery terminal.
2. Remove the fuse box cover (located to the left of the steering wheel or under the hood).
3. Find the relay marked 31726-28X0A (usually indicated on the unit cover).
4. Carefully remove the part by pulling it up (do not use excessive force!).
5. Install the new relay, making sure the contacts match.
6. Connect the battery and check the operation of the system (engine starting, fan operation, etc.).

If the problem persists after replacement, check:

• 🔋 Contact voltage - must be 12 V with the ignition on.
• 🔌 Wiring integrity — oxidized or damaged wires can block the signal.
• 📱 Errors in ECU - reset them via a diagnostic scanner (for example, ELM327).

What to do if the new relay does not work?

If the part does not function after replacement, check:

1. Correct connection (are the contacts mixed up).

2. The presence of voltage at the control terminals (85 and 86).

3. The state of the fuse responsible for this circuit (for example, F10 in the cabin block).

4. If the problem is ECU, the control unit firmware may be required.

Common replacement mistakes and how to avoid them

Even experienced car owners make mistakes when working with electrical components. Nissan. Here are the most common ones:

• ⚡ Ignoring polarity - if you mix it up + And – on the relay contacts, it will burn out the first time it is turned on.
• 🔧 Use of force during installation — relay contacts are fragile and easy to bend.
• 📋 Failure to follow the battery disconnection sequence - always removed first negative terminal!
• 🔍 Purchasing a part without checking the article number - even relays that are similar in appearance can have different characteristics.

To avoid problems, follow a simple rule: Before replacing, take a photo of the location of the old part and its contacts. This will help you install the new relay correctly and not mix up the wires.

Another common mistake is skimping on diagnostics. For example, if in Nissan X-Trail the fan does not work, many people immediately change the relay 31726-28X0Awithout checking the temperature sensor or fuse. As a result, money is wasted.

💡

Before replacing any electrical part, be sure to check the circuit with a multimeter. Often the problem lies not in the relay, but in a broken wire or oxidized contact.

FAQ: answers to frequently asked questions

Can I use relay 31726-28X0A from another Nissan model?

Theoretically yes, if they match voltage, current and contact type. However, it is better to check the catalog or consult your dealer. For example, a relay from Qashqai J10 suitable for X-Trail T31, but it’s not a fact that it will work correctly in Navara D40 with a diesel engine.

How to check if a part is original?

Original relay Nissan 31726-28X0A has:

• Clear engraving of the article number and logo Nissan.
• The plastic is matte, without burrs.
• Contacts with silver coating (counterfeits often have copper without protection).
• Packaging with a hologram and barcode.

Counterfeits are usually lighter in weight and have a rougher build.

What happens if you drive with a faulty fuel pump relay?

If the relay 31726-28X0A is responsible for the fuel pump, its malfunction will lead to:

• Difficulty starting the engine (you will have to turn the starter for a long time).
• Failures during acceleration due to lack of fuel.
• There is a risk of pump failure - it will wear out.

In the worst case, the car will stall right on the road.

Where is relay 31726-28X0A located in Nissan Qashqai?

B Qashqai J10 (2007–2013) relay located in fuse box under the hood (near the battery). The exact location is indicated on the block cover. There is another block in the cabin (to the left of the steering wheel) - this relay is not there.

Can the relay be repaired instead of replaced?

Technically yes, if the problem is burnt contacts. They can be cleaned with fine sandpaper or a file. However, if the coil or board is faulty, repair is impractical - it is cheaper to buy a new relay. Also keep in mind that after repair the reliability of the part decreases.