Genuine Nissan OEM Multi-Layer Steel (MLS) Cylinder Head Gasket with Viton Rubber Coating for QR20DE QR25DE SR20DE Engines

The cylinder head gasket bearing Nissan genuine part number 11044-MA00A (also listed as 11044MA00A) seals the critical interface between the cylinder head and engine block on a wide range of Nissan passenger and commercial vehicles. This original equipment (OE) replacement component is designed for the QR20DE (2.0L), QR25DE (2.5L), and SR20DE (2.0L) engine families, which power numerous global models including the Nissan X-Trail, Altima, Frontier, NV350 Caravan, Atlas, Urvan, and Silvia (S13/S14/S15).

The QR20DE is a 1,998 cc DOHC 16‑valve inline‑4 petrol engine with a bore and stroke of 86.0 mm × 86.0 mm; the QR25DE displaces 2,488 cc with an 89.0 mm × 100.0 mm bore and stroke configuration; the SR20DE shares the same 86.0 mm × 86.0 mm square bore‑stroke design. These engines operate at compression ratios ranging from 9.5:1 to 10.5:1 (depending on variant), generating sustained cylinder pressures that demand a precision‑engineered sealing solution.

The gasket is constructed from multi‑layer steel (MLS) — typically three or more precision‑stamped embossed steel layers with the outer layers utilizing a Viton rubber coating. This MLS design maintains consistent clamping force across thousands of thermal cycles, a critical requirement for engines with aluminum cylinder heads mounted to aluminum engine blocks (in the QR series) or iron blocks (in the SR series). Unlike older composite gaskets, MLS technology requires no additional sealants — installation is performed dry.

A failing cylinder head gasket on any of these Nissan engines typically reveals itself through:

• Gradual coolant loss with no visible external leak
• White steam from the exhaust after warm‑up (coolant burning in the combustion chamber)
• Bubbles in the coolant overflow bottle with the engine running (combustion gases entering the cooling system)
• Pressurised cooling system hoses when cold
• Milky residue under the oil filler cap

Replacing a damaged gasket with this genuine OE component restores factory compression, maintains proper oil and coolant separation, and returns the engine to its original sealing integrity.

This Nissan cylinder head gasket 11044-MA00A directly replaces the factory sealing component in the following configurations:

• Individual packaging: Sealed in anti‑static VCI bag, foam‑lined carton
• Carton dimensions: Approximately 25 × 20 × 2 cm (10 × 8 × 1 inch)
• Gasket net weight: Approximately 0.3-0.5 kg
• Lead time: 3-7 working days for stock orders
• Minimum order quantity: 1 piece (sample order available)
• Shipping methods: FedEx, UPS, DHL for samples; sea freight (LCL/FCL) from Shanghai, Ningbo, Guangzhou ports
• H/S Code: 8484.10