2024 Audi Q4 e-tron

The 12V auxiliary battery can suffer parasitic drain when parked if the Emergency Call (eCall) or online telematics gateway fails to enter sleep mode, immobilising the vehicle.

Symptoms: Vehicle completely dead after standing 48+ hours, "Electrical system: fault! Safely stop vehicle" warning...

Est. repair cost: £150–£400

A documented recall on certain 2024–2025 cars concerns an onboard charger fault that can stop replenishing the 12V battery and lead to loss of drive. The cited campaign is North American; UK applicability must be checked by VIN with Audi.

Symptoms: 12V charging warning, Non-start or loss of drive

Early cars should be checked for software-related connectivity and charging-function issues. Audi offered software 3.2 for vehicles built through model year 2022, adding improved charging and online functions; verify the applicable update with the dealer.

Symptoms: MMI screen black on startup, Audio volume stuck or silent...

The Q4 e-tron uses sealed rear drum brakes to minimize rolling resistance and particle emissions. Due to heavy regenerative braking, internal electromechanical handbrake actuators can stick after parking in wet weather.

Symptoms: Loud clunk or binding when pulling away after rain, Electronic parking brake warning light...

Est. repair cost: £200–£450

On models optioned with the heat pump, internal expansion valves can stick or click loudly in winter temperatures, reducing cabin heating performance and range efficiency.

Symptoms: Clicking or buzzing noise from behind dashboard in cold weather, Cabin slow to warm up in winter...

Est. repair cost: £0–£600