Close
MENU

Follow us on @Ask_ICAR for daily updates.

Home / Collision Repair News / 48-Volt Mild Hybrid Systems: Audi

48-Volt Mild Hybrid Systems: Audi

Posted on 11 January 2024 | Share:
| Print Print

Mild hybrid systems are not new. They were some of the first hybrid vehicles to be put into production. The 48-volt mild hybrid system is now becoming more common among some vehicle makers. What consideration are there for repairing a vehicle equipped with a 48-volt mild hybrid system? Let’s see what Audi has to say.

Audi introduced the 48-volt mild hybrid system on several models in 2019. The 48-volt system is used to support the advance start/stop mode using a belt-driven start-alternator and roll stabilization.

The 48-volt system information can be found in the vehicle-specific Electrical Equipment Repair Manual ➤ 27 - Battery, Starter, Generator, Cruise Control. Review the vehicle build data to confirm which batteries are equipped.

Per Audi service information:

  • "The 12V system is supported by the 48V system via the Voltage Converter, 48V/12V -A7-. So the only way for the 12V vehicle electrical system to be de-energized is to de-energize the 48V system beforehand.
  • "To de-energize the 48V system, perform the de-energizing test plan” this is done with a scan tool."

Per Audi emergency response guides (ERG):

  • "...in order to deactivate the on-board power supply the 48V Lithium-ion battery has to be separately disconnected in addition to the 12V lead acid battery."
  • The negative wire of the 48-volt system is colored brown and purple.

Per the Audi Guideline For Rescue Forces:

"48 volt lines can be identified by their colour, which is purple. Vehicles with 48-volt technology may have subsystems installed that operate in the high-voltage range (alternating current greater than 30 volts). If this is the case, the cables to these system components can be identified by orange warning colour."

The OEM Hybrid and Electric Vehicle Disable Search features battery layouts and step-by-step directions to locate the procedure to disable the 48-volt system.

For additional Audi information, check out the Audi OEM Information page.

Additional I-CAR Collision Repair News you may find helpful:

Related I-CAR Courses

Course I-CAR Hybrid And Electric Vehicle Courses

  • Repairer Driven News: Rivian Updates Door Handle Procedure Sunday, 4 February 2035

    Repairer Driven News (RDN) released an article featuring an updated Rivian procedure.

  • 2025 SkillsUSA National Competition Results Monday, 30 June 2025

    The 2025 SkillsUSA National Leadership and Skills Conference took place on June 26, 2025. Every year I-CAR sends volunteers (virtually in 2021) to judge the collision repair technology competition....

  • Ford/Lincoln Rocker Panel Reinforcement Sectioning Friday, 27 June 2025

    We are often asked, “Can I section this panel?” Let’s take a look at Ford/Lincoln vehicles and sectioning the rocker panel reinforcement.

  • Back-To-Basics: Backside Panel Refinish And Edging Thursday, 26 June 2025

    Sometimes, going back to the basics can make the difference between a quality repair and a failed repair. When repairing and refinishing, you might need to refinish the panel's backside and edges.

  • Hyundai Position Statement: Pre- And Post-Repair System Scanning - UPDATE Monday, 23 June 2025

    Hyundai released an updated position statement relating to pre- and post-repair system scanning.

  • App-Based Connected Services Considerations Tuesday, 17 June 2025

    Have you had an experience where the vehicle notified the owner that it was being moved while it was in your repair facility? App-based connected services are available from many vehicle makers and...

  • Digital Key Considerations Tuesday, 17 June 2025

    The intermingling of technology and automobiles continues, with digital key offerings from most vehicle makers. Digital keys utilize smartphone technology to expand vehicle access and owner...

  • Back-To-Basics: Tire Tread Pattern Wednesday, 11 June 2025

    Sometimes going back-to-basics can make the difference between a quality repair and a failed repair. Let’s see how to identify tire tread patterns and their repair considerations.

  • Corrosion Protection Guidelines: Ford/Lincoln - UPDATE Tuesday, 10 June 2025

    A key factor in collision repair is making long-lasting repairs. When a vehicle is repaired, many areas of corrosion protection are disturbed. This creates corrosion hot spots that, left untreated,...

  • Rivian Restraints Wiring Thursday, 5 June 2025

    The question is often asked, "Can supplemental restraints system wiring be repaired?" The answer is: it depends on the vehicle maker. Let's take a look at Rivian's position on this subject.

Top Ten Vehicle Specific Questions

Hyundai Does Hyundai have a sectioning procedure available?
2014 Jeep CherokeeIs there a procedure available for resetting the active headrestt?
Kia Does Kia have a sectioning procedure available?
Chevrolet Does Chevrolet have a warning against sectioning when there is no procedure?
BMW Can I-CAR send me BMW repair procedures?
Hyundai Does Hyundai have part replacement procedures available?
Honda What does Honda say about repairing damaged airbag system wiring harnesses?
Mercedes-Benz Can I-CAR send me Mercedes-Benz repair procedures?
Honda What does Honda say about straightening front lower rails?
Subaru Do you have to replace a front passenger airbag on a Subaru even if the airbag did not deploy? The repair information seems to indicate that it should.

Top Ten I-CAR Specific Questions

What does I-CAR say about using a recycled quarter panel assembly that includes the inner, outer, and reinforcements?
What does I-CAR say about straightening a kink?
What does I-CAR say about the decision to use recycled parts?
What does I-CAR say about replacing suspension parts in pairs?
What does I-CAR say about repair tolerances?
Can I-CAR General Sectioning Guidelines be used?
What does I-CAR say about repairing damaged door intrusion beams?
What does I-CAR say about repairing damaged bumper reinforcements?
What does I-CAR say about using recycled airbags?
What does I-CAR say about repairing damaged crush boxes?