GT1544S Turbocharger 454064 454064-5001S 028145701LV

Turbocharger GT1544S (454064 / 454064-5001S / 028145701LV) for Volkswagen T4 Transporter 1.9 TD (68 hp, ABL engine)

1. Introduction

Turbocharger GT1544S is a high-quality component developed for diesel engines of Volkswagen T4 Transporter of the first 

generation (1990-2003) with ABL engine of 1.9 l and 68 hp. This model of turbocharger is a key element of the supercharging system, 

providing an optimal ratio of power, fuel efficiency and environmental performance.

2. Technical characteristics

Part numbers: 454064, 454064-5001S, 028145701LV

Turbine type: GT1544S (analog of Garrett GT15)

Application: VW T4 (TYP7D) 1.9 TD (ABL, 1995–2003)

Engine power: 50 kW (68 hp)

Boost pressure: 0.5–0.7 bar

Bearing type: floating bushings (oil cooling)

Impeller material: aluminum alloy (compressor), cast iron (turbine)

Pipes: inlet Ø48 mm, outlet Ø38 mm

Weight: ~4.5 kg

3. Design features

The GT1544S turbine belongs to category of small fixed geometry turbos. Its compact size provides:

Quick response at low rpm (minimal turbo lag).

Efficient operation in the range of 1800–4000 rpm.

Integration with the EGR (exhaust gas recirculation) system.

Key components:

Cold section (compressor): Aluminum impeller with 11 blades, designed to deliver up to 0.12 kg/s of air.

Hot section (turbine): Cast iron housing with nickel-containing wheel alloy, withstanding temperatures up to 850°C.

Cartridge (axle unit): Hydrodynamic bearings with precision balancing (tolerance ≤0.5 g/cm).

4. Compatibility and analogues

The original turbocharger has several alternative numbers:

Manufacturer: Garrett (Honeywell)

Analogues:

BorgWarner 5303-988-0033

Schwitzer S2B

KKK 03-227-01-61

Suitable for models:

VW Transporter T4 (7D) 1.9 TD (ABL, AXK)

VW Caravelle (1995–2000)

Similar engines in SEAT Alhambra, Ford Galaxy.

5. Signs of malfunction

Symptoms requiring a turbine check:

Loss of power (the engine does not pull above 3000 rpm).

Blue smoke from the exhaust (oil combustion in the turbine).

Noises: whistling or grinding during operation.

Oil leaks around the pipes.

6. Operating recommendations

Oil: Use only VW 505.01 specifications (5W-40 synthetic).

Change intervals: Every 10-15 thousand km (together with the filter).

Warm-up/cool-down: Let it idle for 1-2 minutes before driving and after stopping.

7. GT1544S advantages

Reliability: Up to 200 thousand km service life with proper maintenance.

Repairability: Repair kits (bushings, seals) are available.

Environmental friendliness: Complies with Euro 3 standards.

8. Installation and adjustment

During installation, it is important to:

Check the cleanliness of the oil channels.

Replace the sealing rings.

Use a torque wrench (tightening torque 25 Nm).

9. Warranty

The average warranty period for new  turbochargers is 1-2 years or 50 thousand km.

10. Conclusion

GT1544S remains the optimal choice for VW T4 1.9 TD owners, combining a proven design and a balance of performance. 

Regular maintenance will prevent premature wear and ensure stable engine operation.