LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2004 >> GTI Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 1.8L - Exhaust System, Emission Controls - AWD, AWP, AWW Generic (A4 Platform) >> Exhaust System, Emission Controls >> Secondary Air Injection (AIR) System >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Secondary Air Injection (AIR) System: Notes

WARNING: Observe the following for all installations, especially in engine compartment due to lack of room:
  • Route lines of all types (e.g. for fuel, hydraulic, EVAP canister system, coolant and refrigerant, brake fluid, vacuum) and electrical wiring so that the original path is followed.
  • Watch for sufficient clearance to all moving or hot components.