VAG AWX — 1.9L I4 8V SOHC PD Engine
1.9L I4 8V SOHC PD · 130 hp · 310 Nm
The AWX is VAG's 1.9-litre 8-valve SOHC unit-injector diesel, rated at 130 hp and 310 Nm and built from 2001 to 2004. It was fitted to the VW Passat B5.5, Audi A4 B6 and Audi A6 C5, and shares much of its procedure base with the AVF. No recurring faults are documented here for this code, so the page is a working reference rather than a fault list. Its strength is the job data: torque figures for the cylinder head, the toothed belt with both hydraulically and friction-damped tensioning rollers, the camshaft sprocket, the sump including the bolts to the gearbox, the balance shaft assembly and the glow plugs. Factory values cover compression, oil pressure, governed speeds and capacities, and the procedures list includes camshaft removal, crankshaft and con rod clearance checks and unit injector work.
No recurring faults are documented for this engine, so start with general good practice. Confirm the belt history against the 120,000 km interval, since the camshaft drives the unit injectors. For poor starting or smoke, compression should be 25 - 31 bar with a minimum of 19 bar and under 5 bar between cylinders. Check oil pressure at 2.0 bar at 2000 rpm before suspecting wear further in.
Check first
- Oil must be VW 505.01; 507.00 low-SAPS oil is meant for common-rail engines.
- Timing belt every 120,000 km; tensioning roller nut 20 Nm plus 45°.
- Camshaft sprocket bolts 25 Nm.
- Glow plugs 15 Nm.
- Sump capacity including filter 3.6 litres.
Engine overview
Vehicles with this engine
Common torque specifications
| Flywheel Bolts | 60 Nm |
|---|
Torque figures by job
From the step-by-step procedures for this engine — each figure sits in the step that uses it.
- 40 Nm (30 lb-ft) — Tighten with torque wrench to
- 60 Nm (44 lb-ft) — Tighten with torque wrench to
- 20 Nm (15 lb-ft) + 45° — Hold tensioning roller in this position and tighten tensioning roller securing nut (1) to
- 25 Nm (18 lb-ft) — Tighten securing bolts for camshaft sprocket (arrows) to
- 5 Nm (3.7 lb-ft) — Pre-tighten bolts (1
- 45 Nm (33 lb-ft) — Tighten bolts securing sump to gearbox to
- 40 Nm (30 lb-ft) — Tighten bolts M10 (arrows) to
- 15 Nm (11 lb-ft) — Tighten bolts (1
- 20 Nm (15 lb-ft) + 45° — Hold tensioning roller in this position and tighten securing nut to
- 25 Nm (18 lb-ft) — Tighten bolts (1) on camshaft sprocket to
- 25 Nm (18 lb-ft) — Tighten securing bolts for camshaft sprocket (arrows) to
- 20 Nm (15 lb-ft) + 45° — Hold tensioning roller in this position and tighten tensioning roller securing nut (1) to
- 25 Nm (18 lb-ft) — Tighten securing bolts for camshaft sprocket (arrows) to
- 20 Nm (15 lb-ft) + 45° — Hold tensioning roller in this position and tighten tensioning roller nut to
- 25 Nm (18 lb-ft) — Tighten bolts (1) on camshaft sprocket to
- 25 Nm (18 lb-ft) — Tighten securing bolts for camshaft sprocket (arrows) to
- 20 Nm (15 lb-ft) + 45° — Hold tensioning roller in this position and tighten securing nut to
- 25 Nm (18 lb-ft) — Tighten bolts (1) on camshaft sprocket to
- 25 Nm (18 lb-ft) — Tighten securing bolts for camshaft sprocket (arrows) to
- 5 Nm (3.7 lb-ft) — Tighten bolts (1
- 45 Nm (33 lb-ft) — Tighten bolts securing sump to gearbox to
- 40 Nm (30 lb-ft) — Tighten bolts M10 (arrows) to
- 15 Nm (11 lb-ft) — Tighten bolts (1
- 20 Nm (15 lb-ft) — Hold tensioning roller in this position and tighten tensioning roller securing nut as…
- 25 Nm (18 lb-ft) — Tighten securing bolts (1) of camshaft pulley to
- 20 Nm (15 lb-ft) — Retighten securing nut to
- 25 Nm (18 lb-ft) — Tighten securing bolts of camshaft belt pulley to
- 6 Nm (4.4 lb-ft) — Pre-tighten bolts in the sequence (1
- 13 Nm (9.6 lb-ft) — Tighten bolts (5) and (7) to
- 20 Nm (15 lb-ft) — Tighten bolts (1 … 4), (6) and (8) to
- 10 Nm (7.4 lb-ft) — Lock balance shaft with locking tool T10255 and tighten bolts for chain sprocket initially…
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AWX |
| Capacity | 1896 cc |
| Idle speed | 790 - 870 rpm |
| Idle speed | 860 - 945 rpm |
| Normal | 25 - 31 bar |
| Minimum | 19 bar |
| Differential limit between cylinders | < 5 bar |
| Oil pressure | 2.0 / 2000 bar/rpm |
Engine (diesel)
| Number of cylinders | 4 |
| Injector firing order | 1 - 3 - 4 - 2 |
| Exhaust gas analysis | < 2.0 m-1 |
| Min. no-load governed speed | 4900 rpm |
| Max. no-load governed speed | 5200 rpm |
| Exhaust gas analysis test method/probe (Germany only) | B / 1 |
| Oil temperature during test | 80 °C |
| Idle speed, minimum | 800 rpm |
| Idle speed, maximum | 950 rpm |
| Test time | 0.5 s |
Cooling system
| Cap pressure | 1.4 - 1.6 bar |
| Thermostat opens at | 85 - 105 °C |
| Stage 1/Fan 1 | 92 - 97 °C |
| Stage 2/Fan 2 | 99 - 105 °C |
Electrical
| Battery | 62 / 74 / 80 Ah |
| Alternator | 90 / 120 A |
Capacities
| Engine sump, incl. filter | 3.6 l |
| Manual transmission | 012/01W 01A |
| Gearbox refill | 012/01W: 2.25 01A: 2.75 l |
| Cooling system | 7.0 l |
| Air-conditioner refrigerant | 650 - 700 (-> 09/2000) g |
| Air-conditioner refrigerant | 700 - 750 (-> 09/2000) g |
| Air-conditioner refrigerant | 600 ± 25 (10/2000 ->) g |
| Air-conditioner compressor oil | 250 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 40 Nm |
| Cylinder head bolts — Stage 2 | 60 Nm |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Main bearing cap | 65 Nm + 90° Nm |
| Big-end bearing cap | 30 Nm + 90° Nm |
| Oil plug | 30 Nm |
| Glow plugs | 15 Nm |
| Front hub | M14: 115 Nm + 180° M16: 190 Nm + 180° Nm |
| Rear hub | 60 Nm |
| Rear hub | M14: 115 Nm + 180° M16: 190 Nm + 180° Nm |
| Wheel bolts | 120 Nm |
| Crankshaft gearwheel | 120 Nm + 90° Nm |
Emissions
| Emission code | 70/220*1999/102A |
| Emission standard | Euro 3 |
| CO2 average | 149 - 154 g/km |
| CO | 0.065 - 0.080 g/km |
| NOx | 0.403 - 0.483 g/km |
| HC NOx | 0.422 - 0.504 g/km |
| Particles | 0.031 - 0.043 g/km |
| Emission code | 70/220*2001/1A |
| CO2 average | 151 - 154 g/km |
| CO | 0.151 - 0.181 g/km |
| NOx | 0.313 - 0.382 g/km |
| HC NOx | 0.340 - 0.412 g/km |
| Particles | 0.023 - 0.040 g/km |
| Emission code | 70/220*2001/100A |
| CO2 average | 192 - 194 g/km |
| CO | 0.131 - 0.132 g/km |
| NOx | 0.392 - 0.412 g/km |
| HC NOx | 0.433 - 0.440 g/km |
| Particles | 0.032 - 0.039 g/km |
| CO2 average | 192 g/km |
| CO | 0.131 g/km |
| NOx | 0.412 g/km |
| HC NOx | 0.440 g/km |
| Particles | 0.032 g/km |
| CO2 average | 154 - 162 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 100 torque figures.
- Removing, installing and tensioning toothed belt · 29 torque figures
- Removing and installing camshaft · 15 torque figures
- Removing and installing sump · 10 torque figures
- Measuring radial clearance of crankshaft · 11 torque figures
- Vehicles with hydraulic belt tensioning system · 6 torque figures
- Measuring radial clearance of conrods · 8 torque figures
- Removing and installing toothed belt - vehicles with friction-damped tensioning roller · 3 torque figures
- Removing and installing toothed belt - vehicles with hydraulically damped tensioning roller · 2 torque figures
- Removing and installing balance shaft assembly · 4 torque figures
- Checking glow plugs · 7 torque figures
- Removing and installing exhaust gas temperature sender 1G235 · 1 torque figures
- 4-cylinder TDI unit injector engine (1.9 ltr.; 2.0 ltr. 2-valve), mechanics — Removing engine · 1 torque figures
- Removing and installing bracket for ancillaries · 2 torque figures
- Removing and installing cylinder head cover
- Removing engine - vehicles with engine code letters AJM
- Removing engine - vehicles with engine code letters AVF, AWX
- Removing cylinder head - vehicles with engine code letters AJM
- Removing cylinder head - vehicles with engine code letters AVF, AWX
- VW 1.9 TDI / 2.0 8V Injector R&I
- Audi 1.9 TDI / 2.0 8V Injector R&I
- Skoda 1.9 TDI / 2.0 8V Injector R&I
- Removing and installing fuel tank
- Removing, installing and checking coolant thermostat · 1 torque figures
- Removing and installing exhaust gas recirculation cooler
- Checking fuel pump
Service intervals
| Timing Belt Km | 120000 |
|---|---|
| Oil Change Km | 15000 |
| Oil Spec | 5W-30 VW 505.01 (NOT 507.00 — that low-SAPS spec is for common-rail/DPF engines, not PD) |
Pro tips from the field
Got a AWX problem? Ask for free.
Describe the symptoms — TorqFix replies with a diagnosis cited from verified workshop data.
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.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.