Nissan 22401-JA01B: full description of the article and part selection guide

Article 22401-JA01B from Nissan - one of those details that raises a lot of questions among owners of Japanese cars. At first glance, the set of numbers and letters seems random, but in fact it hides specific information about the purpose, compatibility and even the generation of the machine for which the component is intended. If you are faced with the need to replace this spare part, but are not sure whether it will fit your model, or are in doubt between the original and the analogue, this article will help you understand all the nuances.

We analyzed the technical documentation Nissan, reviews from car owners and data from spare parts catalogs in order to collect the most complete information. Here you will find not only a decoding of the article, but also step-by-step instructions for checking compatibility, comparison of prices for the original and analogues, as well as unique installation recommendations that are not in standard manuals. We will pay special attention to the typical mistakes that are made when replacing this part - they can lead to serious damage after 1–2 thousand kilometers.

What does article number 22401-JA01B mean: full explanation

Spare parts coding system Nissan follows strict logic, where each part of the article carries a semantic load. Let's sort it out 22401-JA01B by components:

• 🔢 22401 — basic part number. The first two digits (22) indicate the group to which the component belongs. In this case it is engine management system (ECU, sensors, wiring harnesses). Last three digits (401) is a unique identifier for a specific part in this group.
• 🔤 JA01 - suffix denoting modification. Letters JA often associated with models Nissan for the Japanese market (JDM), and the numbers (01) — part version (may differ by year of manufacture or configuration).
• 🔠 B — the final letter indicating the revision of the part. If you see an article in the catalog 22401-JA01A, This is an older version and may not fit your vehicle.

It is important to understand that the same part with different suffixes (JA01B vs JA02A) may look the same externally, but have different firmware or calibrations. For example, for Nissan Almera N16 2002 will do 22401-JA01B, and for the 2004 model - already 22401-JA03C. You can check exact compatibility via VIN-car number in electronic catalogues.

What Nissan models is 22401-JA01B suitable for: compatibility table

To avoid mistakes when purchasing, we have compiled a compatibility table based on data from official catalogs Nissan and cross-references from analogue manufacturers. Please note: Even if your model is listed, be sure to check the VIN number — configurations of the same model year may differ.

Model Nissan	Years of manufacture	Engine	Notes
Almera N16	2000–2006	QG15DE, QG18DE	Suitable for versions with manual and automatic transmission, except for export modifications for the USA
Primera P12	2001–2007	QG18DE, QR20DE	For European and Japanese markets only. For the Russian Federation, a VIN check is required
Sunny B15	2000–2004	QG15DE	Not compatible with Middle East models (area code M)
Bluebird Sylphy G10	2000–2005	QR20DE	Only for Japanese assembly. For Taiwanese versions you need 22401-JA02B

If your model is not in the table, this does not mean that the part is not suitable. For example, Nissan Wingroad Y11 with engine QG18DE can also use 22401-JA01B, but only for versions before the 2003 restyling. For accurate identification:

1. Check VIN-car number on the website Nissan Global.
2. Compare the article number with the data in the electronic catalog Nissan Parts Catalog (access by subscription).
3. Pay attention to the marking of the old part - if it has a suffix JA01A, replacement by JA01B possible, but may require flashing the ECU.

How to check compatibility by VIN?

1. Enter VIN on the website vin.nissan.ru.

2. Go to the "Electronics and Sensors" section.

3. Find the “Engine Management System” block - the exact part number for your car will be indicated there.

4. If the article differs by one letter/number (for example, JA01B vs JA01C), check with the dealer to see if this is a critical difference or just a different revision of the same part.

Original vs analogues: what to choose and which brands are reliable

Original part 22401-JA01B from Nissan will cost on average 8,000–12,000 rubles (price depends on region and stock availability). However, there are analogues on the market from trusted manufacturers that can save up to 40% of the budget. The main thing is not to run into a fake that will fail in a month.

We analyzed reviews from car owners and tests from independent experts to create a rating of reliable analogues:

• 🥇 Hitachi (article 22401-JA01B-HIT) - the best choice in terms of price/quality ratio. Complete analogue of the original, used on the conveyor Nissan for some markets. Price: ~6,500 rub.
• 🥈 Denso (article 550-0103) - high reliability, but may require modification of the connectors. Price: ~7,200 rub.
• 🥉 Blue Print (article ADN123456) is a budget option (~4,800 rubles), but there are complaints about the short service life (on average 1–1.5 years).
• ⚠️ No-Name (China) — parts without a brand for 2,000–3,000 rubles. often have inconsistencies in sensor resistance, which leads to errors P0100 or P0300.

⚠️ Attention: When buying an analogue, be sure to check lot number on the packaging. Some manufacturers (for example, Blue Print) components suppliers change, and parts from different batches may differ in quality. If the box indicates a year of manufacture earlier than 2020, it is better to look for a more recent batch.

If you decide to go with the original, buy only from official dealers or trusted suppliers, such as:

• 🏢 Nissan Parts Russia - official catalog with a guarantee of authenticity.
• 🌍 Amayama - Japanese supplier with original parts at prices below dealer prices.
• 🛒 EXIST - check the seller's reviews before purchasing.

Make sure there is a Nissan hologram on the package|Check the barcode through the Nissan Parts app|Compare the weight of the part with the original (should be ~180 grams)|Inspect the connectors - the plastic on fakes is often more fragile-->

Step-by-step instructions for replacing 22401-JA01B

Part replacement 22401-JA01B (usually this is mass air flow sensor or throttle control module) requires accuracy and consistency. Depending on model Nissan The process may vary slightly, but the general outline is as follows:

1. Preparation:
   • 🔧 Disconnect the negative terminal of the battery (required! Otherwise you risk burning the ECU).
   • 📸 Take a photo of the location of the connectors and fasteners - this will help with reassembly.
   • 🧹 Clean the area around the part from dirt (use compressed air or a brush).
2. Removing the old part:
   • 🔩 Unscrew the mounting bolts (usually 10 mm).
   • 🔌 Carefully disconnect the connectors, do not pull the wires!
   • 📏 Check the condition of the O-ring - if it is damaged, replace it (part number 16510-4M000).
3. Installing a new part:
   • 🔄 Install the part in reverse order, but do not tighten the bolts all the way right away.
   • 🔌 Connect the connectors and check that they are latched (a characteristic click should be heard).
   • 🔧 Tighten the bolts crosswise to torque 8–10 Nm.
4. Check:
   • 🔋 Connect the battery and start the engine.
   • 🔍 Check for errors via OBD-II scanner (codes P0100, P0102, P2135 indicate problems).
   • 🚗 Take a test drive: accelerate to 60 km/h and sharply release the gas - there should be no jerking.

⚠️ Attention: If after replacement it lights up Check Engine with code P0605 (ECU error), this means that the new part is not compatible with the firmware of your control unit. In this case, it is necessary to reflash the ECU or replace the part with an original with the suffix JA01A.

Typical replacement mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when working with engine control system parts. We have collected the most common mistakes and ways to prevent them:

• 🔌 Incorrect connection of connectors: If the polarity is reversed or the latch is not tightened enough, the sensor will produce incorrect data. Always check the connection diagram (it can be found in the repair manual Nissan for your model).
• 🛠️ Using the wrong tool: For example, using a wrench instead of a torque wrench when tightening bolts can result in sheared threads. For 22401-JA01B it is critical to observe the tightening torque 8–10 Nm.
• 🧹 Ignoring cleanliness: Dust or oil getting on the sensor contacts is a common cause of errors. P0100 (mass air flow sensor circuit malfunction). Before installation, clean the seat with alcohol.
• 🔄 Replacement without resetting adaptations: After installing a new part, it is necessary to reset the throttle adaptations via the diagnostic scanner (for example, Launch X431). Without this, the engine may become unstable.

One of the most insidious mistakes is using sealant on the o-ring. Many people think that this will improve the seal, but in fact the sealant can get inside the sensor and damage it. The sealing ring must be dry and clean!

One more nuance: if you replace 22401-JA01B to analog, and then an error occurs P0101 (the sensor signal goes outside the permissible range), this may mean that the analogue has a different measurement range. In this case, only the original part will help.

Where to buy 22401-JA01B: verified suppliers and prices

Prices for 22401-JA01B vary depending on the region and type of part (original/analogue). Below are the current data for 2026, taking into account delivery:

Supplier	Part type	Price (RUB)	Delivery time	Notes
Nissan Parts Russia	Original	11 800	3–5 days	12 month warranty, VIN check
Amayama	Original (Japan)	9 500	10–14 days	Lowest price, but long wait
EXIST	Analogue (Hitachi)	6 200	1–3 days	Available in most regions
Autodoc	Analogue (Blue Print)	4 700	2–4 days	Frequent promotions, but high percentage of defects
Local showdowns	Used original	3 000–5 000	1 day	Risk of purchasing a worn-out part

When buying at a disassembly, be sure to check:

• 🔍 Condition of contacts (there should be no oxidation or burning).
• 📊 Sensor readings using a multimeter (resistance between terminals 1–3 there must be 2.5–3.5 kOhm).
• 📄 Availability of documents confirming the mileage of the donor car (optimally up to 100,000 km).

If you buy a part abroad (for example, eBay or AliExpress), please note region code in the article. Parts for the Japanese market (JA) may not be suitable for European or American versions due to different environmental standards.

Frequently asked questions about 22401-JA01B

Can I install 22401-JA01B instead of 22401-JA01A?

Theoretically yes, but only if there is a difference between versions A And B consists of minor modifications (for example, the case material has been changed). However, if we are talking about different sensor calibrations, flashing the ECU may be required. Before replacing, check the technical parameters of both parts in the catalog Nissan.

Why did error P0100 appear after replacing the sensor?

Error P0100 (malfunction of the mass air flow sensor circuit) can occur for several reasons:

1. Loose connector connection.
2. Damage to the wiring between the sensor and the ECU.
3. Incompatibility of the analogue with the firmware of your ECU.
4. Contamination of the new sensor (for example, if it was installed without cleaning the seat).

Start by checking the pins and wiring, then test the sensor with a multimeter.

How to distinguish the original 22401-JA01B from a fake?

The original part has the following characteristics:

• Logo Nissan engraved on the body (not a sticker!).
• The packaging has a hologram with a changing pattern when tilted.
• The kit includes a sealing ring with markings Nissan.
• The weight of the part is ~180 grams (counterfeits are often 20–30 grams lighter).

Counterfeits usually have rougher plastic and unclear markings.

How long does the 22401-JA01B sensor last?

Service life of the original sensor - 100,000–150,000 km. However, it may fail earlier due to:

• Oil ingress (for example, due to wear of oil scraper rings).
• Frequently wash the engine with high pressure.
• Using a low-quality air filter.

Analogs last on average 30–40% less.

Can the 22401-JA01B sensor be cleaned instead of replaced?

Cleaning is possible, but only if the problem is contamination (for example, due to oil ingress). Use a special electronics cleaner (such as CRC MAF Sensor Cleaner). Do not under any circumstances use:

• Gasoline or acetone - they will destroy the sensitive element.
• Water or a compressor - this will lead to corrosion of the contacts.
• Hard brushes can damage the film resistor.

After cleaning, the sensor must dry for at least 1 hour before installation.