From 1991 to 1997, the company produced the 1.9-liter VW 1Z 1.9 TDI diesel engine, which was used in many of the German company’s vehicles but is most well-known for the Passat B4 model. This power unit was given an entirely different AHU index following a minor upgrade.
1Z, AFN, AHF, AHU, ALH, AVG, AKU, and AEY are additional models in the EA180 series.
Specifications
| Production years | 1991-1997 |
| Displacement, cc | 1896 |
| Fuel system | direct injection |
| Power output, hp | 90 |
| Torque output, Nm | 202 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 79.5 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 19.5 |
| Features | SOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | yes |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | diesel |
| Euro standards | EURO 2 |
| Fuel consumption, L/100 km (for VW Passat 1995) — city — highway — combined |
6.7 4.1 5.3 |
| Engine lifespan, km | ~450 000 |
The engine was installed on:
- Audi 80 B4 (8C) in 1991 – 1995;
- Audi A4 B5 (8D) in 1995 – 1996;
- Audi A6 C4 (4A) in 1994 – 1996;
- Seat Cordoba 1 (6K) in 1995 – 1996;
- Seat Ibiza 2 (6K) in 1995 – 1996;
- Seat Toledo 1 (1L) in 1995 – 1996;
- Volkswagen Caddy 2 (9K) in 1995 – 1996;
- Volkswagen Golf 3 (1H) in 1993 – 1996;
- Volkswagen Passat B4 (3A) in 1993 – 1997;
- Volkswagen Sharan 1 (7M) in 1995 – 1996;
- Volkswagen Vento 1 (1H) in 1993 – 1996.
Disadvantages of the Volkswagen 1Z engine
This motor is incredibly dependable and only breaks down at very high mileage;
The primary issue is loss of compression due to valve seat burnout;
Investigate the reason behind thrust failures in the EGR valve, mass air flow sensor, and turbine control system;
This oil leak is typically caused by the crankcase ventilation tube’s lower flange bursting;
Sometimes the ribbed belt enters the motor’s timing and end due to a roller breakdown.