AUDI AZC — 6L Engine
6L · 420 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AZC |
| Capacity | 5998 cc |
| Idle speed | 520 - 770 rpm |
| Normal | 11.0 - 13.0 bar |
| Minimum | 10.0 bar |
| Differential limit between cylinders | < 3.0 bar |
| Oil pressure | 0.8 bar/rpm |
| Oil pressure | 3.0 / 2000 < 7.0 / > 2000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch Motronic |
| Number of cylinders | 12 |
| Firing order | 1-12-5-8-3-10-6-7-2-11-4-9 |
| Spark plugs (make and type) | VW/Audi 101 905 600 A NGK PZFR 6 |
| Injector resistance | 13 - 16 ohms |
| Injection pressure/system pressure | 3.5 4.0 bar |
| CO at fast-idle speed | < 0.3 % |
| Fast-idle speed | 2500 - 3000 rpm |
| Lambda | 0.970 - 1.030 |
| Oil temperature during test | 80 °C |
| Closed-loop test at: | 520 - 770 rpm |
| Conditioning catalytic converter | 2 min |
Cooling system
| Cap pressure | 1.6 - 1.8 bar |
Electrical
| Battery | 100 Ah |
Brakes
| Disc thickness, front | FN3: 25.0 HP2, FN2, Brembo: 30.0 mm |
| Disc thickness, front, min. | FN3: 23.0 HP2, FN2, Brembo: 28.0 mm |
| Disc thickness, rear | C38: 10.0 C43: 20.0 mm |
| Disc thickness, rear, min. | C38: 8.0 C43: 18.0 mm |
Steering and wheel alignment
| Toe-in, front | 0°10' ± 02' ° |
| Camber, front | 1BA, 1BM, 1BG, 1BN: -0°50' ± 30' ° |
| Camber, front | 1BE, 1BD: -0°65' ± 30' ° |
| Camber, front | 1BT: -0°45' ± 30' ° |
| Max. difference left side - right side | 30' ° |
| Toe-in, rear | 0°06' ± 05' ° |
| Camber, rear | 0°40' ± 30' ° |
Capacities
| Engine sump, incl. filter | 10.5 l |
| Automatic transmission | 018 |
| Gearbox refill | 3.0 l |
| Differential | 0.5 l |
| Cooling system | 12.0 l |
| Air-conditioner refrigerant | 800 - 850 g |
| Air-conditioner compressor oil | 250 - 300 ml |
Torque settings
| Spark plugs | 30 Nm |
| Oxygen sensor | 55 Nm |
| Wheel bolts | 120 Nm |
| Front hub | 190 Nm + 180° |
| Rear hub | 190 Nm + 180° |
Emissions
| Emission code | 70/220*1999/102B |
| Emission standard | Euro 4 |
| CO2 average | 355 g/km |
| CO | 0.856 g/km |
| HC | 0.084 g/km |
| NOx | 0.011 g/km |
Engine codes in the same family
The same code prefix usually means the same block with a different output, fuel or model year. Procedures are often shared — check the code on the engine plate.
Workshop procedures for this engine
Step-by-step procedures from the workshop database, carrying 11 torque figures.
- Separating engine and gearbox · 7 torque figures
- Removing cylinder head · 1 torque figures
- Checking voltage supply of secondary air pump motor V101 and secondary air pump motor 2V189
- Filling up engine oil after repairs · 2 torque figures
- Replacing engine control unit
- Testing air mass meter
- Checking lambda control and lambda probes; operations for cylinders 1 to 6
- Checking lambda control and lambda probes; operations for cylinders 7 to 12
- Draining · 1 torque figures
- Checking the data exchange between the engine control units and other CAN-capable control units
- Removing and installing right section of intake manifold
- Removing and installing top section of intake manifold
- Testing injection quantity, leak tightness and spray pattern of injectors
- Checking fuel pump relay -J17 and relay actuation
- Checking intake air temperature sender
- Checking activation
- Removing and installing left section of intake manifold
- Checking accelerator position sender
- Checking brake light switch -F or brake pedal switch -F47
- Checking voltage supply of secondary air pump motor V101 and secondary air pump motor 2 V189
- Checking angle sender for throttle valve actuator
- Checking misfire detection
- Checking ignition coils
- Checking Hall senders (camshaft position sensors)
- Removing and installing starter catalytic converters, intermediate pipes and main catalytic converters
Got a AZC problem? Ask for free.
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Get free diagnosis →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.