Understanding The Mechatronics Unit in Your DSG Gearbox

If you drive a VW, Audi, SEAT, or Skoda, you might have heard the term “mechatronics unit” when discussing your DSG automatic gearbox. But what exactly is it, and what does it do? The mechatronics unit is the brain behind the DSG gearbox, responsible for selecting gears and operating the clutches. While the DSG gearbox is often thought of as an automatic transmission, it actually functions more like a manual gearbox with clever enhancements. It uses two clutches to make gear changes seamless and, in some models, controls up to 7 gears. In simple terms, the mechatronics unit handles all the gear-changing tasks that you would normally do in a manual car.

If your car is automatic and less than 15 years old, there’s a good chance it has a DSG gearbox with a mechatronics unit. Not sure? As German car specialists, our team at Volks Autos in Sutton, Surrey, is always happy to check for you and provide expert advice on maintaining or repairing your vehicle.

How Do I Know If My Mechatronics Unit Has Failed?

The symptoms of a failing or failed mechatronics unit can vary depending on the gearbox type and the nature of the failure. Some of the more obvious signs include a complete loss of drive or certain gears not engaging. You might also notice “jerky” gear changes or hear grinding sounds when shifting gears. On some models, you might even see a warning message on the instrument cluster or flashing gear indicator lights.

Why Do Mechatronics Units Fail, And How Can I Prevent It?

The causes of failure can vary depending on the type of DSG gearbox. For instance, the 6-speed wet clutch type can fail electronically due to contaminants in the gearbox oil. Because this variant shares oil between the clutches and the mechatronics unit, it’s crucial to follow the manufacturer’s recommended gearbox oil and filter change schedule to prevent issues. Regular maintenance is essential to keeping these components in good condition.

The 7-speed dry clutch type, on the other hand, has its own set of common faults, such as internal issues within the mechatronics unit that can cause the hydraulic system to over-pressurise and leak externally.

Don’t Ignore The Warning Signs

If you experience any of the warning signs mentioned above, it’s crucial to have your vehicle checked by experts without delay. At Volks Autos, as German car specialists, we understand the intricacies of DSG gearboxes. Our team conducts thorough diagnostic tests to identify potential faults with the mechatronics unit or other components within DSG gearboxes that are also prone to failure. With our extensive knowledge and use of dealer-level diagnostic equipment, we ensure accurate diagnoses, preventing unnecessary and costly part replacements. Getting it right the first time is our priority so you can trust your vehicle is in the best hands.

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FAQs

Why do I need to service my vehicle?

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Regularly servicing your vehicle not only ensures its safety but also helps prevent unnecessary additional repairs, keeping it in the best possible condition. Routine oil and filter changes are essential, as the oil lubricates internal components, and the filters collect particles that contaminate the oil during use. By regularly servicing your vehicle, you can avoid costly mechanical repairs in the future and maintain optimal performance.

What service do I need?

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Minor Service: Typically recommended every 10,000 miles or 1 year, whichever comes first.

Minor Service With Pollen Filter: Typically recommended every 2 years or 20,000 miles, whichever comes first.

Major Service: Typically recommended every 4 years or 40,000 miles, whichever comes first.

Please Note: Service intervals may vary depending on your vehicle’s needs and the manufacturer’s recommendations. If you are unsure about the type of service your vehicle requires, our friendly and knowledgeable service team is here to assist you. We can access your manufacturer's technical data, service intervals, and schedules. We will guide you through the manufacturer's recommendations based on your vehicle's age and service history.

What is an air filter?

The function of an Air filter is to help stop contaminants from getting into the engine, helping to extend its life. It also lets the engine breathe more easily, which can help enhance performance and efficiency.

What is a pollen filter?

The purpose of a pollen filter is to stop contaminants getting into your interior via its heating and ventilation system. The pollen filter prevents dust, dirt, soot and pollen entering your vehicle interior. As well as having the added benefit of protecting against pollution gases, exhaust fumes and bad odour.

Must I use a main dealer until my manufacturer’s warranty expires?

You are not required to have your vehicle serviced by a main dealer to maintain the manufacturer's warranty. Thanks to the European Block Exemption regulation introduced in October 2003, you can choose where to service your car. At Volks Autos, our brand-trained technicians ensure that your service follows the manufacturer's recommended schedule using approved parts. We will update your service book or digital service schedule to reflect the completed work.

Can only main dealer update my Digital Service Record?

As a registered German car specialist, we have secure access to check and update your service record for all German vehicles and most manufacturers currently using Digital Service Records. Additionally, we can review your Digital Service Record to provide advice on any upcoming service items that may be due, all in line with your vehicle’s manufacturer specifications. 

Explore Our Guide to Digital Service Records

Can you reset my service light once the service is complete?

Yes. We have all the necessary electronic equipment to be able to reset your service light and variable service indicators once we have completed your service here at Volks Autos.

Do you perform a health check on my vehicle during the service?

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During your oil change service, our brand-trained technicians will perform a detailed Health Check on your vehicle. This check covers various aspects of your vehicle's health, and the results will be sent directly to your phone, allowing you to see any issues first-hand.

Learn more by visiting our Health Checks Explained

Will you let me know if there is any additional work needed?

We will not proceed with any additional work without your authorisation. If further repairs are needed, your service advisor will contact you with an estimate for the required work.

3rd party warranty – Can I use this at Volks Autos?

Yes, you can use a third-party warranty at Volks Autos. After diagnosing the fault, we can communicate with your warranty company on your behalf, explaining the issue and providing a repair estimate. Typically, customers pay the repair fees to the garage, and the warranty company reimburses them. Most warranty companies require the customer to authorise and cover diagnosis costs before agreeing to contribute to the repair.

Do you offer warranty on repairs you carry out?

We use only the highest quality parts from trusted suppliers and offer a minimum 12-month or 12,000-mile warranty on all mechanical repairs.

Do I need to pay upfront?

Payment is due upon completion of the work when you collect your vehicle. We accept most credit and debit cards or cash. Some special order parts may need to be paid for before ordering.

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