Automatic transmission oil for Nissan Pathfinder R51: how to choose and replace correctly

Automatic transmission Nissan Pathfinder R51 (2005–2012) - a unit that requires special attention to the quality and type of transmission fluid. Incorrect choice of oil or untimely replacement can lead to slipping, jerking when switching and even complete failure of the automatic transmission. In this article, we will look at what kind of oil the manufacturer fills, what analogues are suitable, how often to change the fluid and what to consider when replacing it yourself.

Models Pathfinder R51 equipped with two types of automatic transmissions: RE5R05A (5-speed) and less often - RE7R01A (7-speed in top trim levels). Each of them has its own requirements for the viscosity and composition of the oil. For example, for RE5R05A critical to use approved fluid Matic S or Matic J, otherwise the clutches will start to burn after 30–40 thousand km.

If you encounter delays when changing gears, hum in the box or darkening of the oil, these are clear signals for diagnosis. Next is a detailed analysis of all the nuances, from choosing oil to step-by-step replacement, taking into account the specifics Pathfinder R51.

Original automatic transmission oil for Nissan Pathfinder R51: part numbers and specifications

The manufacturer recommends using exclusively original transmission fluids Nissan. For Pathfinder R51 with box RE5R05A Two types of oils are suitable:

• 🔹 Nissan Matic S (art. KE908-99931) - universal fluid for most automatic transmissions Nissan until 2010. It has a red color, a synthetic base and increased oxidation resistance.
• 🔹 Nissan Matic J (art. KE908-99932) is a more modern analogue, compatible with RE5R05A And RE7R01A. It has a green tint and improved anti-friction properties.

Important: oils Matic D or Matic K don't fit for Pathfinder R51! Their use will lead to accelerated wear of solenoids and slipping of clutches. Original liquids are sold in 1 and 4 liter canisters. For a complete replacement you will need 8–10 liters (including washing).

The cost of original oil varies:

Article	Title	Volume	Average price (RUB)
KE908-99931	Nissan Matic S	1 l	1 200–1 500
KE908-99931	Nissan Matic S	4 l	4 000–4 800
KE908-99932	Nissan Matic J	1 l	1 400–1 700
KE908-99932	Nissan Matic J	4 l	4 500–5 200

Where to buy? Official dealers Nissan or trusted online stores (for example, Exist.ru, Autodoc). Beware of counterfeits - the canister must have a hologram, a clear label and a production date (no older than 2 years).

Analogues of the original oil: what can be filled without risk

If the original oil is not available or its price seems too high, certified analogues can be used. The main thing is that the product has approvals Nissan Matic S or Matic J and met specifications JASO 1A.

The best analogues according to owner reviews Pathfinder R51:

• 🔧 Idemitsu ATF Type M - complete analogue Matic S, often used in Japanese automatic transmissions. Price: ~1,000 rub./l.
• 🔧 Mobil ATF 3309 - universal liquid, compatible with RE5R05A. Suitable for regions with cold climates (up to -40°C).
• 🔧 Ravenol ATF JF011E - German equivalent Matic J, improved cleaning properties. Price: ~1,300 rub./l.
• 🔧 Aisin ATF AFW+ - recommended for boxes Aisin Warner (incl. RE5R05A). Differs in green color.

⚠️ Attention: Do not mix oils from different manufacturers! If you decide to switch from Matic S on Matic J, required complete replacement with flushing (partial mixing is allowed only in emergency cases, such as a leak on the road).

Before purchasing an analogue, check its compatibility in the manufacturer's catalog. For example, on the site Idemitsu There is an online selection by car model. Also pay attention to viscosity: for Pathfinder R51 optimal SAE 75W-80 or 75W-90.

Frequency of oil changes in automatic transmission Pathfinder R51: when to change

Official regulations Nissan says that the oil is in the automatic transmission Pathfinder R51 does not require replacement throughout the entire service life. However, this statement is only true for ideal operating conditions: moderate climate, smooth driving style, no towing. In reality:

• 📅 Every 60,000 km — recommended interval for partial replacement (drain/fill 3–4 liters).
• 📅 Every 90,000–100,000 km — complete replacement with washing (hardware or manual).
• 🚨 Every 30,000 km - if the car is operated in difficult conditions (towing, off-road, frequent traffic jams, heat over +35°C).

Signs that it's time to change the oil immediately:

• 🔴 Jerks when switching (especially from 1st to 2nd gear).
• 🔴 Reaction delays on pressing the gas pedal (more than 1–2 seconds).
• 🔴 Extraneous sounds (hum, grinding) when the box is operating.
• 🔴 Darkening of the oil (a black or brown tint is visible on the dipstick).
• 🔴 Burning smell from under the hood after a long trip.

⚠️ Attention: If you ignore these symptoms, the consequences can be critical - from wear of friction discs (repair cost ~50,000 rub.) up to hydraulic unit failure (up to 150,000 rub.). For example, service centers often encounter cases where a clogged oil filter leads to oil starvation and failure of the planetary gear.

What happens if you don't change the oil at all?

Completely ignoring automatic transmission oil changes Pathfinder R51 after 150–200 thousand km the following happens:

1. **Degradation of additives** - the oil loses its lubricating properties, metal parts begin to “dry” friction.

2. **Clogged valve body channels** - leads to incorrect pressure and chaotic gear shifts.

3. **Wear of bearings** - a hum appears, which over time turns into a grinding sound.

4. **Clutch slipping** - the gearbox “slips”, the car loses its dynamics.

5. **Complete automatic transmission failure** - in 80% of cases, the transmission needs to be replaced (cost of a new one is ~300,000 rubles, a contract price is ~150,000 rubles).

Step-by-step instructions for changing the oil in a Pathfinder R51 automatic transmission

Changing the automatic transmission oil Pathfinder R51 you can do it yourself if you have it inspection hole or lift. To work you will need:

• 🛠️ New oil (8-10 liters for a complete change).
• 🛠️ Automatic transmission filter (art. 31726-31X01 for RE5R05A).
• 🛠️ Pallet gasket (art. 31397-31X02).
• 🛠️ 10 mm wrench (for pallet bolts).
• 🛠️ Funnel with a long hose (for filling through the dipstick).
• 🛠️ Container for draining (volume of at least 5 l).

⚠️ Attention: Before starting work, make sure that the vehicle is parked flat surface, and the box is heated to 50–60°C (drive 5–10 km). This is necessary to completely drain the old oil.

Step 1. Drain the old oil

1. Stop the engine and place a container under the drain hole (located on the automatic transmission tray).
2. Unscrew the drain plug with a 24 mm wrench. Be careful - the oil is hot!
3. Wait until it drains completely (about 3-4 liters).

Step 2: Replacing the filter and cleaning the pan

1. Unscrew the pan bolts (14 pieces) and carefully remove it. ~0.5 liters of oil will remain inside - drain carefully.
2. Replace the automatic transmission filter (it is secured with 3 bolts). The old filter cannot be washed - only replaced!
3. Clean the tray and magnets from metal shavings (use lint-free cloth and solvent).
4. Install a new pan gasket and tighten the bolts criss-cross (tightening torque: 10 Nm).

Step 3. Filling with new oil

1. Insert a funnel into the hole of the automatic transmission dipstick (located next to the engine).
2. Fill in 4 liters of new oil, then check the level on the dipstick. The optimal level is between the marks HOT (hot) and COLD (cold).
3. Start the engine and alternately switch all automatic transmission modes (P-R-N-D-3-2-L), holding each mode for 5 seconds.
4. Add oil to the mark HOT (check with the engine running!).

For complete replacement repeat the drain/fill procedure 2–3 times (with intermediate trips of 5–10 km). This will force the old oil out of the torque converter.

Common mistakes when changing oil and how to avoid them

Even experienced car owners make mistakes that can lead to automatic transmission breakdown. Here are the most common:

• ❌ Incorrect oil level:
  • 🔸 Underfilling — leads to oil starvation and bearing wear.
  • 🔸 Overflow - Causes oil foaming and loss of pressure.

  ✅ Solution: Check the level only on a warm box (oil temperature 50–60°C).

• ❌ Using uncertified oil:

  For example, fill Dexron III instead of Matic S leads to swelling of oil seals and leaks.

  ✅ Solution: Buy oil only with approval Nissan Matic S/J.

• ❌ Ignoring filter replacement:

  The old filter becomes clogged with wear products, which leads to pressure drop in the hydraulic unit.

  ✅ Solution: The filter changes every time when changing the oil, even if it looks clean on the outside.

Another common mistake is improper tightening of pan bolts. If you tighten it, the pan will become deformed; if you don’t tighten it enough, it will leak. Use torque wrench with a torque of 10 Nm.

⚠️ Attention: If after changing the oil there are jerks when switchingmaybe the box requires adaptation. In this case, contact the service to reset errors via Consult-III.

Signs of a Pathfinder R51 automatic transmission malfunction: when the oil has nothing to do with it

Automatic transmission problems are not always related to oil. If symptoms persist after replacing the fluid, there may be other causes:

Symptom	Possible reason	Solution
Jerking when switching to cold	Wear of valve body solenoids	Replacing solenoids or valve body assembly
Vibration at speeds of 60–80 km/h	Primary shaft bearing wear	Replacing the bearing (requires disassembling the automatic transmission)
Reverse gear does not engage	Failure of the planetary gear or clutches	Automatic transmission overhaul
Noise when driving	Worn differential or bearings	Diagnostics on a lift

If you notice oil stains under the car, check:

• 🔍 Condition of the drive shaft oil seal (frequent leakage in Pathfinder R51).
• 🔍 The tightness of the automatic transmission pan (the gasket could have become leaky).
• 🔍 Automatic transmission cooling radiator (sometimes cracks over time).

For accurate diagnosis, use a scanner Launch X431 or Consult-III. For example, error P0730 indicates a malfunction in the box, and P0740 - for problems with torque converter locking.

FAQ: Frequently asked questions about automatic transmission oil Nissan Pathfinder R51

Can Nissan Matic S and Matic J be mixed?

In emergency cases (for example, a leak on the road), mixing is allowed, but no more than 1 liter. After this it is necessary completely change the oil with washing. Long-term use of the mixture will lead to additive degradation and accelerated wear of friction clutches.

How much oil to fill during a partial change?

With a partial replacement, ~3.5–4 liters are drained (this is approximately 40–50% of the total volume). Accordingly, the same amount of new oil is poured. Complete replacement required 8–10 liters (depending on the method - hardware or manual).

How to check the oil level in a Pathfinder R51 automatic transmission?

Check procedure:

1. Warm up the box (drive 10–15 km).
2. Place the car on a level surface.
3. With the engine running, switch the selector through all modes (P-R-N-D-2-L) and return to P.
4. Take the dipstick out, wipe it, put it back in and take it out again.
5. The level should be between the marks HOT.

⚠️ Do not check the level when it is cold! This will give incorrect readings.

What to do if jerking occurs after changing the oil?

Possible causes and solutions:

• 🔹 Incorrect oil level - add or drain excess.
• 🔹 Poor quality oil - replace with the original.
• 🔹 Dirty filter - if the filter has not been changed, it needs to be replaced again.
• 🔹 Automatic transmission adaptation — contact the service to reset errors using diagnostic equipment.

What kind of oil should I fill into the Pathfinder R51 automatic transmission for winter use?

For regions with frosts below -30°C, it is recommended to use Nissan Matic J or analogues with improved low-temperature properties (for example, Ravenol ATF JF011E). These oils remain fluid down to -40°C, making cold starts easier. Avoid oils with higher viscosities 75W-90 - they thicken in the cold.