2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump Housing

Product Details

The Nissan Altima 2.5L Water Pump Housing is a replacement engine cooling-system housing for compatible 2019–2024 Nissan Altima models equipped with the 2.5L PR25DD four-cylinder petrol engine. Nissan refers to this component under several names, including Engine Water Pump Housing, Thermostat Housing, and Cover-Water Pump, which can make identification confusing when sourcing replacement cooling-system parts.

The principal current Nissan OEM reference is 21013-6CA0B. Nissan’s official parts catalog identifies this component specifically as a 2.5L Altima water pump/thermostat housing and states that it replaces earlier reference 21013-6CA0A. Nissan documents the current part across the 2019–2025 Altima range.

The Nissan Altima 2.5L Water Pump Housing is suitable for Nissan specialists, engine repair workshops, cooling-system repair businesses, automotive parts distributors, vehicle rebuilders, exporters, and wholesale buyers requiring PR25DD engine cooling components.

Exact product condition, manufacturer, included gaskets, thermostat, water pump, bolts, sensors, and other components should be confirmed for the actual unit supplied.

OEM Reference 21013-6CA0B

The most important current reference is:

OEM Part Number: 21013-6CA0B
Earlier Reference: 21013-6CA0A
Description: Cover-Water Pump
Other Names: Water Pump Housing / Thermostat Housing
Engine: 2.5L PR25DD
Primary Vehicle: Nissan Altima

Nissan’s official listing identifies 21013-6CA0B as the current Engine Water Pump Housing and explicitly states that it supersedes 21013-6CA0A.

OEM fitment data lists the part across compatible 2019–2025 Altima Platinum, S, SL, SR and SV models with the 2.5L PR25DD engine.

For the requested product range, the Nissan Altima 2.5L Water Pump Housing therefore has confirmed catalog support from 2019 through 2024.

2019-2024 Nissan Altima Fitment

Compatible applications include selected:

• 2019 Nissan Altima 2.5L
• 2020 Nissan Altima 2.5L
• 2021 Nissan Altima 2.5L
• 2022 Nissan Altima 2.5L
• 2023 Nissan Altima 2.5L
• 2024 Nissan Altima 2.5L

Potential trims include:

• Altima S
• Altima SV
• Altima SR 2.5L
• Altima SL
• Altima Platinum where offered

The critical compatibility factor is the 2.5L PR25DD engine.

Nissan’s 2019 and 2024 official cooling-system catalogs both list 21013-6CA0B as the water pump housing for the 2.5L Altima.

VIN verification is still recommended for commercial orders.

PR25DD Engine Only

The Nissan Altima 2.5L Water Pump Housing is intended for compatible PR25DD-powered cars.

It should not automatically be supplied for the 2.0L VC-Turbo KR20DDET Altima.

Nissan’s 2019 cooling-system catalog shows that the 2.0L turbo engine uses a separate thermostat housing, 11061-5NA0A, and a different water-pump family.

Therefore, buyers should verify:

• 2.5L engine
• PR25DD engine code
• Original housing number
• VIN

before ordering.

A visually similar housing for another Nissan engine should not be assumed interchangeable.

Water Pump Housing vs Water Pump

One important distinction is that the Nissan Altima 2.5L Water Pump Housing and the water pump itself are separate service components.

For compatible 2.5L Altima applications, Nissan lists:

21013-6CA0B – Water Pump Housing

and separately:

21010-3RC2A – Engine Water Pump

Nissan describes the 21010-3RC2A water pump as including its gasket and pulley on the applicable configuration.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Therefore, a product advertised as a water pump housing should not automatically be described as including the mechanical water pump.

The quotation should clearly state whether the buyer receives:

• Housing only
• Housing with water pump
• Complete cooling assembly  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump
• Used assembled unit with selected attached components

Water Pump Gasket

Nissan also lists the water pump gasket separately.

For the 2.5L PR25DD application, the relevant current reference is:

21014-1KC1A – Water Pump Gasket

Earlier catalog reference 21014-1KC0A is superseded by 21014-1KC1A.

The Nissan Altima 2.5L Water Pump Housing should not automatically be advertised as including a new pump gasket unless the actual package contains one.

Professional installers should inspect all sealing surfaces during replacement.

Housing / Water Inlet Gasket

Another important sealing component is:

13050-5NA0A – Water Inlet / Thermostat Housing Gasket

OEM fitment data identifies this gasket for compatible 2019–2025 Altima 2.5L PR25DD applications.

This gasket is separate from the water pump gasket.

Customers rebuilding the cooling system should therefore distinguish between:

• Water pump gasket
• Housing/water inlet gasket
• Thermostat seal  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Using the correct replacement seals helps reduce the risk of coolant leakage after installation.

Thermostat Is a Separate Component

Although Nissan calls 21013-6CA0B a Thermostat Housing in some catalog descriptions, the thermostat itself is separately serviced.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Nissan lists:

21200-ED00A – Engine Coolant Thermostat

for the applicable cooling arrangement.

Therefore, the Nissan Altima 2.5L Water Pump Housing should not be described as containing a thermostat unless one is physically installed in the supplied assembly.

This distinction is particularly important when selling used engine components where attached parts may vary from one donor vehicle to another.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Water Outlet

The cooling system also includes a separate water outlet.

Nissan identifies:

11060-6CA0A – Water Outlet

for compatible 2.5L Altima applications.

The water outlet should not be confused with the Nissan Altima 2.5L Water Pump Housing.

When diagnosing coolant leaks, technicians should identify exactly which housing, flange, gasket, or outlet has failed before replacing components.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Coolant Temperature Sensor

Nissan’s cooling-system diagram separately identifies:

22630-JA10A – Engine Coolant Temperature Sensor

on the relevant 2.5L system.

A water pump housing should not automatically be assumed to contain this sensor.

If purchasing a used assembly, buyers should inspect whether sensors and connectors remain attached and whether wiring has been damaged during vehicle dismantling.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Reasons for Water Pump Housing Replacement

Replacement of the Nissan Altima 2.5L Water Pump Housing may be necessary after problems such as:

• Coolant leakage
• Cracked housing
• Damaged gasket sealing surface
• Accident damage
• Broken mounting points
• Corrosion or deterioration
• Engine replacement
• Cooling-system overhaul  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Coolant leakage around this area should be diagnosed carefully because the leak may originate from the pump, gasket, thermostat housing, water outlet, hose connection, or another nearby component.

Used Housing Inspection

If the Nissan Altima 2.5L Water Pump Housing is supplied as a used original component, inspect:

• Housing body
• Mounting surfaces
• Bolt holes
• Hose connections
• Gasket surfaces
• Cracks
• Corrosion
• Previous sealant
• Broken fittings
• Impact damage  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

The housing should also be cleaned and checked before installation.

A used unit should not automatically be described as leak-free or ready to install unless its condition has been verified.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

New OEM vs Aftermarket Replacement

This component can potentially be supplied as:

• New Genuine Nissan
• New aftermarket replacement
• Used original Nissan component
• Complete used cooling assembly  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Only a component manufactured and supplied as a genuine Nissan part should be described as Genuine Nissan OEM.

An aftermarket product that cross-references 21013-6CA0B should instead be described as compatible with or replacing OEM reference 21013-6CA0B.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

This keeps the Nissan Altima 2.5L Water Pump Housing listing accurate for B2B customers.

Professional Installation Recommended

Professional installation is recommended.

Cooling-system work can require:

• Coolant draining
• Hose removal
• Water-pump removal
• Housing removal
• Gasket replacement
• Correct fastener tightening
• Cooling-system refilling
• Air bleeding  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

After fitting the Nissan Altima 2.5L Water Pump Housing, technicians should inspect for coolant leakage and confirm that the engine reaches and maintains normal operating temperature.

Any trapped air should be removed according to appropriate service procedures.

Suitable for B2B Automotive Buyers

The Nissan Altima 2.5L Water Pump Housing is suitable for:

Nissan Repair Specialists

For PR25DD cooling-system repair.

Engine Workshops

For replacement during engine rebuilding or engine installation.

Automotive Parts Distributors

For stocking model-specific Nissan cooling components.

Vehicle Rebuilders

For restoring accident-damaged Altima vehicles.

Cooling-System Repair Shops

For correcting damaged housings and coolant leaks.

Export and Wholesale Buyers

Commercial quantities can be requested subject to specification and availability.

Information Required Before Ordering

For accurate fitment, provide:

• Vehicle year
• Nissan Altima trim
• VIN
• 2.5L engine confirmation
• PR25DD confirmation
• Existing OEM housing number
• Required quantity
• Delivery destination

Also specify whether the requirement is for:

• Housing only
• Housing plus gasket
• Housing and water pump
• Complete used assembly  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

Request a Quote  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump

For pricing and availability of the Nissan Altima 2.5L Water Pump Housing, provide the vehicle year, VIN, PR25DD engine confirmation, original part number, required quantity, and shipping destination.

The current OEM reference is 21013-6CA0B, replacing 21013-6CA0A.

Exact brand, OEM or aftermarket status, condition, water pump inclusion, thermostat inclusion, gaskets, sensors, bolts, packaging, MOQ, stock, and freight terms should be confirmed for the actual product supplied.  2019-2024 Nissan Altima 2.5L Engine Coolant Water Pump