Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Downloading Software And Replacing The Control Module
New software can be downloaded into the accessory USB unit (AUU). When software is ordered the software and hardware of the vehicle are compared with Volvo's central database. If the comparison corresponds then the software is downloaded into the control module.
If the comparison between the car and Volvo's central database does not correspond, the database is updated with the vehicle's configuration. When this is complete, new software is downloaded.
The Accessory USB unit (AUU) is located behind the glove compartment down to the left on the cowl panel.
Select the MOST network for a total download of software to the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.