OEM air hose that runs from the driver side of intake manifold to the brake booster on the firewall. A crack or break in this line can cause major vacuum problems and could possibly leave you stranded.
Manual trans only.
FITS: All Mk4 Golf/Jetta 1.8T AWW/AWP, From VIN # 1J-1-013 041 split is in model year 2001, For AWW & AWP engine codes only