The Golf 4 and other platform models with transverse engines were equipped with the 2.3-liter Volkswagen AQN 2.3 VR5 gasoline engine, which was manufactured between 2000 and 2005. The AZX index belongs to a comparable power unit that was longitudinally installed on the Passat B5.
AGZ, AQN, and AZX are part of the EA395 series.
Specifications
| Production years | 2000-2005 |
| Displacement, cc | 2324 |
| Fuel system | injector |
| Power output, hp | 170 |
| Torque output, Nm | 220 |
| Cylinder block | cast iron VR5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 90.2 |
| Compression ratio | 10.8 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | 2 chains |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.6 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for VW Golf 2001) — city — highway — combined |
13.2 7.2 9.3 |
| Engine lifespan, km | ~280 000 |
The engine was installed on:
- Volkswagen Beetle 1 (9C) in 2000 – 2005;
- Volkswagen Bora 1 (1J) in 2000 – 2002;
- Volkswagen Golf 4 (1J) in 2000 – 2003;
- Seat Toledo 2 (1M) in 2001 – 2003.
Disadvantages of the VW AQN engine
You must recognize that this is an uncommon power engine with service issues;
The engine is well-known for both its high mileage and fuel consumption;
The timing chain has limited resources, and replacing it is difficult and costly;
You must replace the valve cover because there are frequently oil leaks from beneath it.
Air leaks or throttle contamination are the causes of floating engine speeds.