How to replace the engine oil cooler on a Nissan Pathfinder with an automatic transmission?

The oil cooler of engines with automatic transmissions is connected to an adapter on the front part of the oil pan near the oil filter. It also contains the oil pressure sending unit and it has got a pressure relief valve for oil. The engine has got two hoses that are used to connect the cooler: one is used as an inlet side while another one serves as an outlet side. The radiator coolant is what helps in reducing temperature of oil by using an oil cooler. To replace the oil cooler, drain the engine oil and cooling system, detach the hoses, remove the oil pressure sending unit, and loosen the retaining bolt to remove the oil cooler and O-rings. If necessary, separate this oil cooler adapter from its upper aluminum section of this same kind of pan. Then clean these mating surfaces, attach new gasket and then fix on top of that adapter again. The O-rings need to be lubricated before fitting it on top of that casting protusion while aligning those tabs over this cooler's body so as to fit into this adapter' s casting protusions. Next tighten the retaining bolt onto specified torque value, install hoses and check for leakage after running engine. Lastly check levels of coolant and oils adding those where necessary.

Genuine Nissan Pathfinder Engine Oil Cooler

Oil Cooler

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14 Engine Oil Coolers found

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Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-4W003
$485.65 MSRP: $741.23
You Save: $255.58 (35%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-4W00A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2001-2004 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.5L | VQ35DE
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Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-9N00A
$591.21 MSRP: $843.30
You Save: $252.09 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Oil Cooler Assy; Oil Cooler
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2022-2025 Nissan Pathfinder
- 2013-2020 Nissan Pathfinder | Platinum, S, SL, SV | 6 Cyl 3.5L | VQ35DD, VQ35DE
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Nissan Pathfinder Cooler ASY Oil
Part Number: 21305-JA12B
$557.68 MSRP: $810.63
You Save: $252.95 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-JA13B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2013-2014 Nissan Pathfinder | Platinum, S, SL, SV | 6 Cyl 3.5L | VQ35DE
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Nissan Pathfinder Cooler ASY Oil
Part Number: 21305-3KY1A
$736.06 MSRP: $1132.13
You Save: $396.07 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Oil Cooler Assy; Oil Cooler
- Replaces: 21305-3KY0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2014 Nissan Pathfinder | Platinum, SL, SV | 4 Cyl 2.5L | QR25DER
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Nissan Pathfinder Oil Cooler Assembly
Part Number: 21305-3KY0A
$736.06 MSRP: $1132.13
You Save: $396.07 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-3KY1A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2014 Nissan Pathfinder | Platinum, SL, SV | 4 Cyl 2.5L | QR25DER
View related parts
Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-EA22B
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-EA24B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2011-2012 Nissan Pathfinder | LE, S, SE, Silver Edition, SV | 6 Cyl 4.0L | VQ40DE
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Nissan Pathfinder Cooler ASY Oil
Part Number: 21305-EA21B
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-EA24B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2008-2012 Nissan Pathfinder | LE, S, SE, SE Off-Road, SV | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-EA21A
Product Specifications
- Other Name: Oil Cooler Assy; Oil Cooler
- Replaces: 21305-EA210
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2009 Nissan Pathfinder | LE, S, SE, SE Off-Road, XE | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-EA210
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-EA21A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2008 Nissan Pathfinder | LE, S, SE, SE Off-Road, XE | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-ZQ52A
Product Specifications
- Other Name: Oil Cooler Assy; Oil Cooler
- Replaces: 21305-ZQ51A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2010-2012 Nissan Pathfinder | LE | 8 Cyl 5.6L | VK56DE
View related parts
Nissan Pathfinder Cooler ASY Oil
Part Number: 21305-ZQ51A
Product Specifications
- Other Name: Oil Cooler Assy
- Replaced by: 21305-ZQ52A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2010-2012 Nissan Pathfinder | LE | 8 Cyl 5.6L | VK56DE
View related parts
Nissan Pathfinder Cooler Assembly - Oil
Part Number: 21305-4W002
Product Specifications
- Other Name: Oil Cooler Assy
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2000-2002 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.5L | VQ35DE
View related parts
Nissan Pathfinder Cooler Assembly-Oil
Part Number: 21305-4W001
Product Specifications
- Other Name: Oil Cooler Assy
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2000-2001 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.5L | VQ35DE
View related parts
Nissan Pathfinder Cooler ASY Oil
Part Number: 21305-ZQ50A
Product Specifications
- Other Name: Oil Cooler Assy; Oil Cooler
- Replaces: 21305-ZE00B, 21305-ZE00A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2007-2011 Nissan Pathfinder | LE, SE | 8 Cyl 5.6L | VK56DE

Nissan Pathfinder Engine Oil Cooler

The Engine Oil Cooler of the Nissan Pathfinder prevents engine oil from overheating as the loads grow heavier while still permitting it to warm up quickly for smooth starts. The Engine Oil Cooler is a system unit that sits inside the coolant circuit. The hot lubricant travels through narrow, tortuous passages that come into contact with the cooler antifreeze. The temperature difference draws heat away from the oil before its viscosity drops or it starts to oxidize. When coasting along at low revs, that same coolant brings up oil temperature to an ideal level within minutes and ensures that bearings and pistons have full protection. Over the years, Pathfinder has predominantly applied an oil-to-water style Engine Oil Cooler. This is because it achieves fast warm-up with consistent peak control for Nissan SUVs. However, owners should note that rust or sludge in the coolant can block flow and allow peak temperature to climb. The Engine Oil Cooler principle is common between earlier trucks and later Pathfinder generations, although size and hose routing evolved alongside new engines. So long as the coolant passages are kept clean, the Engine Oil Cooler maintains viscosity and preserves Nissan durability.

If you need any OEM Nissan Pathfinder Engine Oil Cooler, feel free to choose them out of our huge selection of genuine Nissan Pathfinder Engine Oil Cooler. All our parts are offered at unbeatable prices and are supported by the manufacturer's warranty. In addition, we offer quick shipping to have your parts delivered to your door step in a matter of days.

Nissan Pathfinder Engine Oil Cooler Parts Questions & Experts Answers

Cooler Assembly-Oil
21305-4W003
Q: How to replace the engine oil cooler on a Nissan Pathfinder with an automatic transmission?
A:
The oil cooler of engines with automatic transmissions is connected to an adapter on the front part of the oil pan near the oil filter. It also contains the oil pressure sending unit and it has got a pressure relief valve for oil. The engine has got two hoses that are used to connect the cooler: one is used as an inlet side while another one serves as an outlet side. The radiator coolant is what helps in reducing temperature of oil by using an oil cooler. To replace the oil cooler, drain the engine oil and cooling system, detach the hoses, remove the oil pressure sending unit, and loosen the retaining bolt to remove the oil cooler and O-rings. If necessary, separate this oil cooler adapter from its upper aluminum section of this same kind of pan. Then clean these mating surfaces, attach new gasket and then fix on top of that adapter again. The O-rings need to be lubricated before fitting it on top of that casting protusion while aligning those tabs over this cooler's body so as to fit into this adapter' s casting protusions. Next tighten the retaining bolt onto specified torque value, install hoses and check for leakage after running engine. Lastly check levels of coolant and oils adding those where necessary.