Engine Compartment - 4-Cylinder Engines

Engine compartment of Audi 80 with 66 kW engine and Mono-Motronic fuel injection system
1 – activated charcoal canister solenoid valve (fuel tank ventilation);
2 – battery tray cover;
3 – coolant temperature sensor;
4 – ignition coil with electronic control unit;
5 – brake fluid reservoir;
6 – fuse box;
7 – windshield washer fluid filler neck;
8 – power steering system reservoir;
9 – coolant expansion tank;
10 – anti-lock brake system hydraulic unit;
11 – brake master cylinder;
12 – engine oil dipstick;
13 – alternator;
14 – engine oil filler cap;
15 – Mono-Motronic fuel metering unit;
16 – intake noise silencer.

Engine compartment of Audi 80 with 85 kW engine and Digifant fuel injection system
1 – air flow meter;
2 – activated charcoal canister solenoid valve (fuel tank ventilation);
3 – throttle valve housing with accelerator cable;
4 – battery tray cover;
5 – crankcase ventilation valve;
6 – ignition coil with electronic control unit;
7 – coolant temperature sensor;
8 – brake fluid reservoir;
9 – anti-lock brake system hydraulic unit;
10 – fuse box (central control unit);
11 – coolant expansion tank;
12 – windshield washer fluid filler neck;
13 – power steering system reservoir;
14 – brake booster with brake master cylinder;
15 – engine cooling fan motor;
16 – engine oil dipstick;
17 – alternator;
18 – engine oil filler cap;
19 – idle speed control valve;
20 – cooling fan thermal switch (after engine shutdown);
21 – cold start valve;
22 – air filter housing.