Turbo cartridge786137-5001S, 786137-0001, 786137-1

The Turbo Cartridge 786137-5001S / 786137-0001 / 786137-1 is a high-quality replacement turbocharger core designed 

for Opel diesel engines, specifically the 2.0 CDTI A20DTH power unit. This turbo cartridge, also commonly referred to 

as a CHRA (Centre Housing Rotating Assembly) or turbo core, plays a crucial role in restoring turbocharger performance, 

fuel efficiency, and overall engine reliability without the need to replace the entire turbocharger assembly.

This model is widely used in popular Opel vehicles such as the Insignia, Astra, and Zafira manufactured from 2007 onwards. 

With its robust design and compatibility with the 1956 ccm 2.0 CDTI diesel engine producing 160 HP (118 kW), the 786137 

turbo cartridge ensures that your vehicle continues to deliver strong acceleration, optimal torque, and excellent fuel economy.

1. What is a Turbo Cartridge (CHRA)?

The turbo cartridge, or CHRA, is the central component of a turbocharger. It contains the turbine wheel, compressor wheel, 

and the shaft connecting them, all housed within a bearing system. The CHRA is the heart of the turbocharger, 

responsible for converting exhaust gas energy into compressed intake air.

Instead of replacing the entire turbocharger unit, which can be costly, the CHRA can be replaced independently. 

This makes it a cost-effective solution for repairing a failing or damaged turbocharger while ensuring the same level of performance as a brand-new unit.

2. Vehicle Applications

The 786137-5001S turbo cartridge is designed for Opel diesel engines, particularly the 2.0 CDTI A20DTH. The main compatible vehicles include:

• Opel Insignia 2.0 CDTI (2007– ) – The Insignia is Opel’s flagship sedan and station wagon, known for its refined design,

• comfortable interior, and strong diesel engines. With the 160 HP A20DTH engine,

• the Insignia delivers excellent highway performance and fuel economy.

• Opel Astra 2.0 CDTI (2007– ) – A compact hatchback and estate model that combines practicality with strong performance.

• The 2.0 CDTI engine with turbocharging provides a balance of power and efficiency, making the Astra suitable for both city and long-distance driving.

• Opel Zafira 2.0 CDTI (2007– ) – The Zafira MPV is known for its versatility and spacious seven-seat configuration.

• With the turbocharged diesel engine, it offers smooth acceleration and reliable torque, ideal for family use and long trips.

3. Engine Compatibility: A20DTH 2.0 CDTI

The Opel A20DTH engine is a 2.0-liter, four-cylinder, turbocharged common-rail diesel engine with a displacement of 1956 cc. 

Producing 160 horsepower (118 kW), it provides a strong balance between performance and fuel economy.

Key features of the A20DTH engine include:

• Turbocharging with variable geometry for improved efficiency.

• Common-rail direct injection for precise fuel delivery.

• Excellent torque characteristics, providing power at low and mid-range RPMs.

• Euro 4/5 emissions compliance (depending on production year).

The 786137 turbo cartridge is a direct fit for this engine, ensuring factory-standard performance.

4. Technical Specifications of Turbo Cartridge 786137-5001S

• Part Numbers: 786137-5001S, 786137-0001, 786137-1

• Type: Turbocharger Cartridge / CHRA

• Bearing Type: Journal Bearing

• Compatible Turbochargers: Designed to fit the original turbo housing used in Opel’s 2.0 CDTI engines.

• Material: High-strength alloy components for durability under high temperatures and pressures.

• Balancing: Precision-balanced for reliable operation and minimal vibration.

5. Why Choose a Replacement Turbo Cartridge?

When a turbocharger fails, common symptoms include loss of power, black smoke, excessive oil consumption, and whistling noises. 

In many cases, the failure occurs within the CHRA, due to worn bearings, damaged turbine/compressor wheels, or oil contamination.

Replacing only the cartridge offers several advantages:

• Cost Efficiency: Far less expensive than replacing the complete turbocharger.

• Ease of Installation: Fits directly into the original turbo housing.

• Restored Performance: Brings the turbocharger back to factory specifications.

• Environmental Benefits: Reduces waste by reusing the existing turbo housing.

6. Installation and Maintenance

Installing the 786137 turbo cartridge is straightforward for experienced mechanics. The process involves removing the turbocharger from the engine, 

opening the housing, and replacing the old CHRA with the new cartridge.

Important considerations during installation:

1. Ensure the oil feed and return lines are clean and unobstructed.

2. Replace the oil and air filters before installing the new cartridge.

3. Prime the turbo with fresh engine oil before starting the engine.

4. After installation, allow the engine to idle for a few minutes to ensure proper oil circulation.

Regular maintenance, including timely oil changes and the use of high-quality lubricants, significantly 

extends the lifespan of both the turbo cartridge and the engine.

7. Performance Benefits

By replacing a damaged or worn turbo cartridge with the 786137-5001S, drivers can expect:

• Restored Power Output: Engine performance returns to its original 160 HP specification.

• Improved Fuel Economy: Efficient turbocharging ensures optimal combustion.

• Lower Emissions: Proper turbo function reduces smoke and pollutant output.

• Extended Engine Life: A properly functioning turbocharger reduces engine strain.

8. Quality and Reliability

The 786137 cartridge is manufactured to high standards, with advanced balancing and quality control processes. 

Since the CHRA operates at speeds exceeding 200,000 RPM, precision engineering is critical. Each unit undergoes testing to ensure durability and vibration-free performance.

With proper maintenance, the replacement cartridge can provide years of reliable service comparable to the original equipment.

9. Conclusion

The Turbo Cartridge 786137-5001S / 786137-0001 / 786137-1 is an ideal solution for Opel drivers experiencing 

turbocharger issues in their Insignia, Astra, or Zafira 2.0 CDTI A20DTH (2007– ) vehicles. Combining affordability, reliability, 

and ease of installation, this cartridge restores lost performance and ensures continued driving comfort.

For vehicle owners, workshops, and parts suppliers, choosing the correct turbo cartridge is essential for maintaining Opel’s 

reputation for efficiency and reliability. With this high-quality CHRA, you can be confident that your 2.0 CDTI 

diesel engine will continue to deliver smooth, powerful, and economical performance.