Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2004A4 SEDAN (8E2) L4-1.8L TURBO (AMB)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSELECTRONIC THROTTLE CONTROL MODULELOCATIONSEVAP CANISTER/LEAK DETECTION SYSTEM (FWD AND AWD)
2004 Audi A4 Sedan (8E2) L4-1.8L Turbo (AMB)
EVAP Canister/Leak Detection System (FWD And AWD)
2004 Audi A4 Sedan (8E2) L4-1.8L Turbo (AMB)SECTION EVAP Canister/Leak Detection System (FWD And AWD)
EVAP Canister/leak Detection System (Front And All Wheel Drives)
EVAP canister/leak detection system - component overview
1 - Cap nut -9 Nm
2 - Cover
- For EVAP canister
3 - Stud bolt -16 Nm
4 - Sealing piece
5 - Vent line
- From gravity valve at fuel tank
- To remove, press release ring on EVAP canister
6 - Vent line
- to Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-
- To remove, press release ring on EVAP canister
7 - Air filter housing
- for Leak Detection Pump (LDP) -V144-
- no maintenance procedure
8 - 4 Nm
9 - Vacuum line
- to Leak Detection Pump (LDP) -V144-
10 - Cable tie
- for securing vacuum line to Leak Detection Pump (LDP) bracket
11 - Leak Detection Pump (LDP) -V144-
- Component location: Under wheel housing liner in rear left wheelhouse
12 - Electrical harness connector
- Black
13 - Connection hose
- Leak Detection Pump (LDP)/EVAP canister
- Pressure side
- to remove, press release button at connection on Leak Detection Pump (LDP)
14 - Connection hose
- Leak Detection Pump (LDP)/air filter
15 - Cable tie
- for securing hose to Leak Detection Pump (LDP) bracket
16 - Sealing piece
17 - Cable tie
- for securing connection hose to wheel housing
18 - EVAP canister
- Component location: Bottom of spare wheel well
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.