Details

• Brand:

  

• SKU:

  N3H1-15-1H0B

• Positions: Lower
• Other Names:

  Engine Coolant Thermostat Housing, Final Buy Per Mc

• Description:

  Genuine OEM Mazda Thermostat Housing (N3H1-15-1H0B) — the factory-spec lower thermostat housing assembly engineered to contain and seal the coolant thermostat on Mazda's 13B-MSP Renesis rotary engine. When a cracked or warped housing causes coolant leaks, overheating, or loss of coolant system pressure on your RX-8, the Mazda N3H1-15-1H0B thermostat housing is the exact OEM lower unit — precision-cast to the factory dimensions of the Renesis cooling circuit for a leak-free, pressure-stable seal. Features: - Lower Housing Position: This is the lower thermostat housing that mates directly to the front cover of the RX-8's 13B-MSP rotary engine — housing the thermostat and forming the critical coolant routing junction between the engine block and radiator circuit. - Production Date Specific: Applies to RX-8 vehicles produced to 12/01/2004 — the early production specification. Verify your vehicle's production date via VIN to confirm correct housing variant before ordering. - Engine Coolant Thermostat Housing Function: Contains the wax-pellet thermostat and directs coolant between the closed-circuit (engine warm-up) and open-circuit (radiator cooling) flow paths based on engine temperature. - Genuine Mazda Construction: Cast and machined to Mazda's OEM specifications for dimensional accuracy, sealing surface flatness, and long-term thermal cycling resistance — eliminating the warping and leakage common with aftermarket alternatives. - 12-Month Manufacturer Warranty: Backed by Mazda's standard OEM parts warranty from date of purchase. Additional Details: - Compatibility: 2004–2005 Mazda RX-8 — Base, Shinka — 1.3L R2 Rotary Gas — to production date 12/01/2004 - Position: Lower - Replaces: N3H1-15-1H0A, N3H1-15-1H0B-PT - Other Names: Engine Coolant Thermostat Housing, Final Buy Per Mc - Note: The thermostat itself (N3H1-15-171) and the housing gasket (N3H1-10-153) are sold separately. Confirm your build date for the correct variant of the 2004 2005 Mazda RX-8 thermostat housing OEM application. Order genuine Mazda N3H1151H0B today and restore a factory-tight, leak-free thermostat housing to your RX-8 — Mazda RX-8 thermostat housing replacement done right.

• Replaces:

  n3h1151h0a, n3h1151h0bpt

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