Maintain correct crankcase ventilation and reliable engine operation with this Genuine Nissan Breather Hose, designed to suit Nissan Patrol GQ Y60 models fitted with the TB42S 4.2L carburettor petrol engine. This OEM breather hose connects the rocker cover to the air box assembly, allowing crankcase vapours to be correctly routed back through the intake system as part of the factory ventilation system.

Over time, the original rubber breather hose is exposed to constant engine heat, oil vapours and harsh under-bonnet conditions, causing it to harden, become brittle and eventually crack or split. A damaged hose can create vacuum leaks, allow oily vapours to escape into the engine bay and affect engine performance. Replacing it with a Genuine Nissan component restores proper crankcase ventilation and helps maintain reliable engine operation.

Features & Benefits

• Genuine Nissan OEM part
• Connects the rocker cover to the air box assembly
• Maintains correct crankcase ventilation operation
• Helps prevent pressure build-up within the engine
• Reduces the risk of vacuum leaks caused by cracked hoses
• Helps prevent oil vapour leaks into the engine bay
• Manufactured from high-quality heat and oil-resistant rubber
• Correct factory moulded shape for accurate routing and fitment
• Designed to withstand harsh engine bay temperatures
• Manufactured to Nissan factory specifications for reliable service life
• Direct replacement for cracked, hardened or deteriorated original hoses

Vehicle Fitment

• Nissan Patrol GQ Y60 TB42S 

Please check your vehicle compatibility before purchasing. Contact us with your VIN if you require assistance confirming fitment.

Common Signs You May Need to Replace Your Breather Hose

• Cracked or split rubber hose
• Hardened or brittle hose material
• Oil residue around the rocker cover area
• Vacuum leaks affecting engine performance
• Rough idle or poor engine running
• Oily vapours escaping into the engine bay
• Reduced crankcase ventilation performance
• Preventative replacement during engine servicing
• Restoring a high-kilometre TB42S engine

Replacing a worn Genuine Nissan Breather Hose helps restore correct crankcase ventilation, prevent vacuum leaks and maintain a cleaner engine bay. Choosing a Genuine Nissan OEM replacement ensures precise fitment, reliable durability and the quality expected from original factory engine components.