ℹ️ Key Product & Technical Specifications

• Official Catalog Description: Thermostat & Water Control Valve Housing Assembly (Map-Controlled Electronic Thermostat)

• Condition: 100% Brand New Premium Aftermarket (Direct Factory Fit)

• Primary Nissan / Infiniti OEM Part Number: 21250-EZ31A (or 21250EZ31A)

• Superseded & Interchange OEM Numbers:

  • 21250-1LA1A / 212501LA1A

  • 21250-1LA0A / 212501LA0A

  • 21250-EZ30A / 21250EZ30A

• Connector & Housing Specifications:

  • Electrical Connector: 2-Pin Integrated Heater/Actuator Plug

  • Housing Material: High-Temperature Glass-Reinforced Polymer / Composite with Pre-Installed Rubber Gasket Seal

• Engine Compatibility: VK56VD — 5.6L (5,552 cc) 32-Valve DOHC Direct-Injection V8

• Vehicle Compatibility:

  • Nissan Patrol Y62 (Y62): (2010–2024 5.6L VK56VD V8 — LE, Platinum, Nismo)

  • Nissan Armada (Y62): (2017–2024 5.6L VK56VD V8)

  • Nissan Titan & Titan XD (A61): (2016–2024 5.6L VK56VD V8)

  • Nissan NV1500 / NV2500 / NV3500 (F80): (2017–2021 5.6L VK56VD V8)

  • Infiniti QX80 (Z62): (2014–2024 5.6L VK56VD V8)

  • Infiniti QX56 (Z62): (2011–2013 5.6L VK56VD V8)

  • Infiniti Q70 / M56 (Y51): (2011–2019 5.6L VK56VD V8)

NEW ELECTRONIC THERMOSTAT & WATER

CONTROL VALVE ASSEMBLY

(21250-EZ31A) — VK56VD 5.6L V8

PRIMARY OEM PART NUMBER: 21250-EZ31A

Superseded & Alternate OEM Numbers: 21250-1LA1A | 21250-1LA0A | 21250-EZ30A

Official Catalog Name: Thermostat & Water Control Valve Assembly

Engine Code: VK56VD 5.6L 32-Valve DOHC V8

🏬 WELCOME TO SOUK AUTO PARTS

Your trusted global supplier for Genuine OEM, Premium Aftermarket, and Quality-Tested Used Auto Spare Parts. We specialize in precise technical cataloging and direct factory/OEM cross-referencing to ensure you get the exact fitment every single time.

🛠️ ITEM DESCRIPTION & TECHNICAL SPECIFICATIONS

Up for sale is a Brand New Premium Aftermarket Electronic Thermostat & Water Control Valve Assembly (21250-EZ31A) engineered for Nissan and Infiniti VK56VD 5.6L V8 engines.

Unlike conventional wax-pellet thermostats, the VK56VD utilizes an ECU-controlled heated wax thermostat integrated directly into the water control housing to actively regulate coolant flow under varying engine loads and ambient temperatures. Manufactured to strict factory thermal calibration and pressure tolerances, this complete bolt-on assembly includes the integrated thermostat element, electrical heater actuator connector, and molded perimeter seal.

• Quantity: 1 Complete Electronic Thermostat Housing Assembly

• Part Condition: 100% Brand New

• Brand: Premium Aftermarket (OEM Spec)

• Electrical Connector: 2-Pin Plug-and-Play Factory Connector

• Housing Material: Reinforced Thermal-Stable Composite

DIAGNOSTIC & INSTALLATION NOTE: Replacing a stuck or electrically failed electronic thermostat (21250-EZ31A) resolves common VK56VD V8 cooling issues including engine overheating under load, slow warm-up / low coolant temperature readings, cracked plastic housing coolant leaks, and diagnostic fault codes P0128 (Coolant Thermostat Below Regulating Temperature) or P0597 / P0598 / P0599 (Thermostat Heater Control Circuit). (Note: Always vacuum-fill or properly bleed air pockets from the cooling system after installation using Nissan Blue Long-Life Antifreeze/Coolant).

🚘 VEHICLE COMPATIBILITY

Fits the following Nissan and Infiniti models equipped with the 5.6L VK56VD 32-Valve DOHC V8 Engine:

Nissan:

• Nissan Patrol Y62: 2010–2024 (5.6L VK56VD V8 — LE, Platinum, Nismo)

• Nissan Armada (Y62): 2017–2024 (5.6L VK56VD V8)

• Nissan Titan / Titan XD (A61): 2016–2024 (5.6L VK56VD V8)

• Nissan NV1500 / NV2500 / NV3500 (F80): 2017–2021 (5.6L VK56VD V8)

Infiniti:

• Infiniti QX80 (Z62): 2014–2024 (5.6L VK56VD V8)

• Infiniti QX56 (Z62): 2011–2013 (5.6L VK56VD V8)

• Infiniti Q70 / M56 (Y51): 2011–2019 (5.6L VK56VD V8)

(Important Fitment Note: Designed specifically for the VK56VD Direct-Injection V8. Does NOT fit earlier 2004–2015 VK56DE port-injected engines or 4.0L VQ40DE V6 Patrol Y62 models).

🔍 FREE VIN / CHASSIS FITMENT VERIFICATION GUARANTEE

Avoid ordering errors and return hassles! Ensure exact engine and production-year compatibility before placing your order.

Before placing your order:

1. Send Souk Auto Parts your 17-digit VIN or Frame/Chassis Number (e.g., JN8AY2NY... or JN8AZ2NE...) via eBay Messages.

2. Our technical database team will run a direct Nissan / Infiniti FAST EPC check to confirm 100% exact fitment for your specific vehicle.

📦 WHY BUY FROM SOUK AUTO PARTS?

• Quality Assured: Tested for thermal opening temperature accuracy, actuator heater coil resistance, and housing pressure integrity.

• Fast Dispatch: Orders processed and shipped within 1 business day with full online tracking.

• Secure Packaging: Heavy-duty reinforced boxes with specialized shock absorption material to protect the housing and electrical connector pins during international transit.

• Global Express Shipping: We ship worldwide via trusted express couriers. (Note: Import duties, taxes, and custom charges are the buyer's responsibility).