New turbo 1.9 D JTD CDTI Astra Signum Vectra Zafira 9-3 740067-0002 740067-5002S 755046-0001 755046-0002 755046-0003 755046-5001S 755046-5002S GT1749MV

New turbocharger replacement GT1749MV 1.9 D JTD CDTI TID DTH Euro 4 Z19dth

Compatible Vehicles:

Fiat:

• Croma II 1.9 JTD 16V Euro 4, 1910 ccm, 150 KM

Opel:

• Astra H 1.9 CDTI Z19DTH, 1910 ccm, 150 KM
• Signum 1.9 CDTI Z19DTH, 1910 ccm, 150 KM
• Vectra C 1.9 CDTI Z19DTH, 1910 ccm, 150 KM
• Zafira B 1.9 CDTI Z19DTH, 1910 ccm, 150 KM

Saab:

• 9-3 II 1.9 TID M741 1.9 DTH Euro 4, 1910 ccm, 150 KM

Cadillac:

• BLS 1.9 D, 1910 ccm, 150 KM
• BLS Wagon 1.9 D, 1910 ccm, 150 KM

Part Numbers:

740067-0002, 740067-5002S, 755046-0001, 755046-0002, 755046-0003, 755046-5001S, 755046-5002S, 755046-5003S, 755046-9002S, 766340-0001, 766340-0002, 766340-5001S, 766340-5002, 766340-5002S, 773720-0001, 773720-5001S, 0849537, 0860069, 0860072, 0860075, 0860549, 0894348, 14078921, 55190872, 55196766, 55196859, 55205356, 55205483, 55211063, 55217692, 5849029, 5849537, 5860015, 71724100, 71787483, 71790775, 71790778, 71792075, 71793953, 71793975, 93169106, 93179081, 93181979, 93183988, 93184791

GT1749MV Turbocharger for 1.9 CDTI / JTD / TiD / DTH Euro 4 (Z19DTH) – Causes of Turbo Damage

The GT1749MV turbocharger, designed for 1.9 diesel engines such as CDTI, JTD, TiD, and DTH (Z19DTH – Euro 4), is recognized for its solid performance and efficiency. However, specific engine-related issues can significantly shorten its lifespan if not addressed promptly.

Common Reasons for Turbocharger Damage:

1. Oil contamination and sludge buildup
   Extended service intervals can lead to oil degradation, restricting lubrication and causing premature bearing wear.
2. DPF blockage and excessive backpressure
   A clogged diesel particulate filter increases exhaust pressure, overheating the turbine and accelerating internal wear.
3. Sticking variable vanes
   Carbon buildup from the EGR system may restrict the VNT mechanism, causing overboost or underboost conditions.
4. Vacuum or actuator failure
   Leaks in vacuum lines or faulty boost control components can result in improper turbo regulation and mechanical stress.
5. Intake system leaks
   Boost leaks or damaged intercooler hoses force the turbo to work harder, reducing efficiency and durability.

How to Prevent Failure:

• Maintain strict oil and filter change intervals.
• Monitor DPF condition and ensure proper regeneration.
• Inspect vacuum lines and actuator operation regularly.
• Check intercooler hoses and intake connections for leaks.
• Allow the engine to cool down after heavy driving.

Conclusion:

The GT1749MV turbocharger in 1.9 Z19DTH Euro 4 engines is reliable when properly maintained. Preventive servicing and early detection of exhaust or lubrication issues are key to ensuring long-term turbo performance.