034-101-3027 - 034Motorsport Silicone Lower Block Breather Hose for Audi A4 B5/B6 1.8T AWM / AMB

The 034Motorsport silicone lower block breather hose (reference 034-101-3027) is designed to replace the entire assembly of original plastic and rubber breather hoses that crack and disintegrate on the longitudinal 1.8T engines of the Audi A4 B5 and B6 with AWM and AMB engine codes. Ideal for tuning or engine ventilation system restoration, this reinforced silicone hose improves the reliability of the breather system and limits parasitic air leaks responsible for malfunctions (misfires, lean mixture, fault codes, etc.).

Key Features

• Fully reinforced silicone lower block breather hose, replacing aging original plastic/rubber components.
• Compatible with longitudinal 06B 1.8T engines found in Audi A4 B5/B6 with AWM and AMB codes.
• Replaces several OEM references in the lower block breather circuit:
  – T-hose: 06A 103 247
  – Block breather tube: 06A 103 213F / 06A 103 213AM
  – Valve cover breather tube: 06B 103 213G / 06B 103 213AK.
• Billet aluminum lower block adapter with O-ring, reusing the original retaining clip for a secure and leak-proof fitment.
• Aluminum adapter for the Y-hose and hose clamps included for a complete kit ready to install.
• Available in black only, for a discreet and OEM+ look in the engine bay.
• Sold individually (price for one complete lower block hose kit).

Vehicle Compatibility

This 034Motorsport silicone lower block breather hose 034-101-3027 is intended for the following longitudinal 1.8T engines, installed in Audi A4 B5/B6 models:

• Audi A4 B5 1.8T AWM – up to early 2001/2002 (longitudinal 06B 1.8T engine).
• Audi A4 B6 1.8T AMB – up to serial number 8E-3-040000, replaces:
  – T-hose 06A 103 247
  – Block breather tube 06A 103 213F
  – Valve cover breather tube 06B 103 213G.
• Audi A4 B6 1.8T AMB – from VIN 8E-3-040000 to 8E-3-500000, replaces:
  – T-hose 06A 103 247
  – Block breather tube 06A 103 213AM
  – Valve cover breather tube 06B 103 213AK.

Please check your engine code (AWM / AMB) and chassis number (VIN) to correctly select this lower block breather kit before ordering.

Benefits for Reliability and Performance

• Eliminates OEM breather system weak points (crumbling hoses, brittle plastic connectors), which are sources of vacuum leaks and idle or engine adaptation issues.
• Reinforced silicone is more resistant to heat, oil vapors, and repeated thermal cycles than original parts.
• Particularly recommended during a 1.8T engine build (remapping, turbo upgrade, etc.) to ensure the reliability of the crankcase ventilation circuit.
• Complete kit with billet aluminum adapters and clamps, for a clean and durable installation.

Product Reference: 034-101-3027
Brand: 034Motorsport
Product Type: Reinforced silicone lower block breather hose
OEM Interchange: 06A103247, 06A103213F, 06A103213AM, 06B103213G, 06B103213AK