A 2017 Audi A4 can be jump-started using another vehicle or a portable jump starter. The key is to use the correct connection order, observe safety precautions, and account for possible battery location differences in this model. If in doubt, consult the owner’s manual or contact roadside assistance for help.
What you’ll need
Gather the essential equipment and review safety considerations before connecting the cables.
- A pair of quality jumper cables rated for a 12V system
- A second vehicle with a charged battery or a portable jump starter
- Personal protective equipment such as gloves and safety glasses
- Flat, stable ground and parking brake engaged
Use cables that are long enough to reach between vehicles and avoid touching clamps together during setup.
Step-by-step jump start
Follow these steps in order to safely boost the Audi A4’s battery without damaging its electrical systems.
- Park both vehicles on level ground, switch off all accessories, and set the parking brakes. Do not start either engine yet.
- Locate the dead battery’s positive terminal. If your A4 provides a dedicated jump-start terminal under the hood, use that post; otherwise connect to the positive battery post. Identify a solid ground point on the engine block or chassis away from the dead battery.
- Attach the red jumper clamp to the dead battery’s positive terminal, then connect the other red clamp to the donor battery’s positive terminal or to the jump-start terminal.
- Attach the black jumper clamp to the donor battery’s negative terminal, then connect the other black clamp to the chosen ground point on the dead car (engine block or unpainted metal), away from the battery and fuel system.
- Start the donor vehicle and let it run for a few minutes to feed the dead battery. If the A4 starts, proceed to the next step; if not, stop trying after a few attempts and reassess.
- Start the Audi A4. Once running, remove the cables in reverse order: black clamp from the dead car first, then black clamp from the donor, followed by the red clamp from the donor, and finally the red clamp from the A4’s battery.
Keep clamps away from moving parts and never let them touch each other during removal.
Audi-specific considerations
Battery location and jump-start terminals
The 2017 Audi A4 (B9) often places the 12V battery in the trunk, but many models also provide a jump-start terminal in the engine bay for convenience. If you locate a red jump-start post under the hood, use it as the positive connection and a solid engine-ground point for the negative connection. If your car’s battery is truly in the trunk, follow the manual’s guidance on how to access the jump-start point or use the trunk battery access as instructed.
Electronic systems and CAN bus considerations
Audi vehicles rely on modern control modules that may require a brief idle period or a short drive after a jump-start to reinitialize. If the car exhibits unusual electrical behavior after starting, avoid repeated jumping and seek professional assistance if the issue persists.
When to avoid jump-start and what to do instead
Skip a jump-start if you notice battery swelling, leakage, cracks, or significant damage to cables. If the vehicle won’t start after a couple of attempts, or if warning lights remain on or the immobilizer behaves irregularly, contact roadside assistance rather than continuing to attempt boosts.
- Swollen, leaking, or cracked battery
- Damaged cables or terminals
- Persistent starting failures or abnormal electrical behavior
In these cases, it’s safer to have the system inspected by a professional rather than risking further damage.
What to do after starting
Once the A4 starts, keep the engine running and drive for at least 20–30 minutes to recharge the battery through the alternator. If the battery repeatedly fails to hold a charge, have it and the alternator tested and consider replacement if needed.
Summary
Jump-starting a 2017 Audi A4 involves using a donor battery or portable jump starter, connecting cables in a safe, correct order, and paying attention to the car’s battery location and electronics. Always prioritize safety, consult the manual for exact jump-start points, and have the charging system inspected if the battery repeatedly fails.