Gates EMH237 Engine Crankcase Breather Hose - Oil Separator To Intake Tube or Oil Separator To PCV Valve

OE-Exact Crankcase Breather Hose

Gates EMH237 is an OE-exact engine crankcase breather hose for emission control and crankcase ventilation service. It is built from durable plastic with molded, clip-on ends to restore proper routing between the oil separator and the PCV system on select Audi and Volkswagen applications.

For Audi A3, A4, TT, TTS Quattro and Volkswagen GTI, Jetta, Passat, Eos, and related models, this Gates emission control hose is made to match the original hose layout and connection style. The EMH237 part number is a direct reference for buyers looking for a precise replacement hose for the crankcase ventilation circuit.

Key Features

• OE Exact comparison rating for factory-style fit and routing
• Plastic construction for emission hose service
• Clip-on end type at both connections
• Molded hose design with no branches
• Inside diameter: 16 mm (0.63 in)
• Centerline length: 521 mm (20.5 in)
• Designed for oil separator to PCV valve and oil separator to intake tube locations

Product Details

Gates Emission Control Hose EMH237 is part of the Gates Emission Control Hose line, focused on OE-style replacement hoses for crankcase ventilation and emission system repair. This hose is engineered to replace a worn, cracked, or leaking breather hose and help return the emission system to proper operation. The molded shape, clip-on ends, and OE-exact comparison rating support accurate fitment on the listed Audi and Volkswagen platforms.

This part cross-references Rein ABV0154 and URO 06F103235A for the same application.

Common Problems This Hose Can Address

• Cracked or brittle crankcase breather hose
• Vacuum leaks in the PCV or oil separator circuit
• Oil vapor routing issues in the crankcase ventilation system
• Check engine light concerns related to emission hose leakage
• Improper hose fit after a failed original hose replacement

Installation Notes and Tips

• Verify the hose path from the oil separator to the PCV valve or intake tube before installation.
• Inspect the clip-on connectors and mating ports for wear, debris, or damage.
• Confirm the 16 mm inside diameter and 521 mm centerline length against the original hose.
• Replace any damaged seals or adjacent ventilation components during service.
• Use the vehicle-specific fitment listing to confirm the correct Audi or Volkswagen application.

Quality Assurance

Gates manufactures this hose as an OE-exact replacement for emission control and crankcase ventilation service, using materials selected for durability and service life. EMH237 is built to match the original hose configuration for the listed Audi and Volkswagen applications.