TSH-575IGBT Audi Continental iBSG Repair part IGBT replacement

TSH-575IGBT IGBT Replacement Module for Audi Continental iBSG Generators

This high-quality TSH-575IGBT module is specifically designed for the repair of 48V starter-generators (iBSG) manufactured by Audi Continental. This replacement part targets one of the most common failure points in the mentioned units, enabling service centers to avoid complex and costly full unit replacements. Stremtec proudly offers this spare part as one of the first on the market, helping to repair the phenomenon known as the „mild-hybrid catastrophe”.

Comprehensive Compatibility

The TSH-575IGBT module can be used for units with the following Audi Continental iBSG part numbers:

Key Features and Advantages

This replacement IGBT module directly addresses the main cause of failure that leads to the premature failure of the starter-generators.

• Direct Repair: Enables the repair of the iBSG unit without the need to replace the entire generator, resulting in significant cost savings.

• Egyszerű Telepítés: The module is easy to install, and an installation video is available to assist with professional replacement.

• Reliability: The module is designed to withstand thermal damage caused by overloading, which is the primary reason for the failure of original parts.

Common Failures and Diagnostics of 48V Starter-Generators

Problems with the 48V starter-generator (iBSG) found in Audi vehicles have been known for a long time and often lead to vehicle immobilization. Although dealerships previously carried out recalls, in the case of later failures, the repair costs are borne by the owners.

Symptoms and Error Messages

Faults detected by the driver are often general in nature and do not always directly indicate an alternator failure. Messages appearing on the dashboard often relate to the following systems:

1. Main Electrical Network (Mains)

2. Start-Stop system

3. Brake power booster and other components directly connected to the starter-generator or the 48V battery.

The most common ECU error codes readable with diagnostic tools in case of 48V system failure:

• P065C00: Generator mechanical characteristics – Intermittent operation

• U046900: Starter-Generator Control Unit, Invalid Signal (36564)

• P0CA700: Hybrid drive battery, excessively high discharge current

• U046900: Starter/Generator control unit, invalid signal

The Real Cause of Failure

Although some recalls officially cited moisture-induced corrosion, the real problem was the excessive operating current current. This current caused overheating in the power transistors (IGBTs), which led to the burnout of the control board.

Consequences:

When the alternator fails, it almost always completely drains the 48V battery. This battery switches into protection mode, which results in the immobilization of the vehicle. It is important to note that in such a case, installing a new alternator alone will not solve the problem: the battery's protection status must be released using an ODIS diagnostic tool. Furthermore, deep discharge of the high-voltage battery can cause cellular-level damage, which is irreversible.

Important Installation Precautions on the Vehicle

To ensure the successful and durable operation of the new IGBT module, the following vehicle-related specifications must be strictly observed:

1. 48V Battery Charge Level: To start the vehicle, the 48V lithium battery must be charged to at least the 70% charge state (approx. 49.5V). Although the motor may start at a lower voltage, this can cause severe damage to the generator. Photographic evidence of the charge level is required.

2. Coolant Filling Method: The coolant using a vacuum filling method must be filled. Simple filling followed by bleeding using a computer only removes air from the motor's water circuit. Air may remain in the generator's water circuit. Improper bleeding leads to severe heat transfer problems, which drastically reduce the lifespan of the new IGBT module. This is especially critical because the current flow rate of the original IGBTs was lower.

ATTENTION: If the above precautionary steps are not followed, replacing all other components may become necessary.

Technical Data (TSH-575IGBT)

Since this is a spare part, the most important technical parameters relate to the built-in semiconductors that ensure adequate performance and heat management.

This TSH-575IGBT replacement part offers a crucial solution for one of the most common and costly failures in modern Audi mild-hybrid systems, ensuring professional and economical repair.