Standard Ignition V872 Engine Crankcase Breather Hose

Engine Crankcase Breather Hose Overview

Standard Ignition V872 is an engine crankcase breather hose for emission control and crankcase ventilation service. It is built with a no-connector design and hose diameters sized for a 0.04 in (10.414 mm) inlet and a 0.07 in (10.16 mm) outlet.

Compatible With 2003-2007 Ford Focus, 2005-2008 Ford Escape, 2006-2009 Ford Fusion, and 2006-2009 Mercury Milan applications, this hose supports crankcase ventilation routing where the original hose has aged, cracked, or lost sealing integrity. Standard Ignition V872 is also referenced by part number V872 for ordering and service lookup.

Key Features

• Engine crankcase breather hose for emission control and crankcase ventilation systems
• No connector design
• Inlet diameter: 0.04 in (10.414 mm)
• Outlet diameter: 0.07 in (10.16 mm)
• Direct-fit application coverage for select Ford and Mercury vehicles
• Cross-reference part numbers include 2-9943 and 3S4Z6758AA

Detailed Description

Standard Ignition V872 is a replacement crankcase breather hose used to route vapors within the engine crankcase ventilation system. Proper hose condition helps maintain the intended flow path between connected components, which is important for emission control performance and stable engine operation. This part number V872 is listed for 2003-2007 Ford Focus, 2005-2008 Ford Escape, 2006-2009 Ford Fusion, and 2006-2009 Mercury Milan applications.

This hose is specified with a no-connector configuration and measured inlet and outlet diameters that support accurate hose matching during service. For technicians and DIY repairs, V872 is a practical replacement when the original breather hose is brittle, split, or no longer seals correctly.

What It Helps Fix

• Cracked or deteriorated crankcase breather hose material
• Vacuum or ventilation leaks in the crankcase ventilation path
• Improper vapor routing caused by a damaged hose
• Emission control issues related to worn ventilation plumbing
• Fitment problems when replacing the original hose on Ford Focus, Ford Escape, Ford Fusion, or Mercury Milan

Installation Notes and Tips

Verify hose routing, inlet and outlet sizing, and connector style before installation. Compare the original hose to Standard Ignition V872 to confirm the no-connector configuration and diameter match. Inspect adjoining PCV and breather components for wear, oil saturation, or cracking so the replacement hose can seal and function as intended.

Quality Assurance

Standard Ignition is an established aftermarket brand for ignition and engine management service parts. This part cross-references 2-9943 and 3S4Z6758AA for the same application.