The typical recommended cold tire pressure for most 2018 Audi A4 models is about 33 psi in both front and rear tires. Exact values depend on tire size and load, so always verify on the door placard or in the owner's manual.
Where to find the official numbers
Official tire pressures are specified by Audi for your exact wheel size and load conditions. The door jamb label on the driver’s side and the owner’s manual are the authoritative sources.
Common configurations you may encounter on the 2018 A4 include the following baseline guidance.
- Front tires (standard sizes): approximately 33 psi cold
- Rear tires (standard sizes): approximately 33 psi cold
Always verify with the door placard for your specific vehicle, since wheel size (e.g., 17", 18", 19") and trim can adjust the recommended pressures.
Adjusting for load and conditions
Under heavier loads or extreme temperatures, Audi may recommend small pressure adjustments. Use the placard as the primary reference and avoid exceeding the tire’s maximum inflation pressure listed on the tire sidewall or in the manual.
How to check and adjust tire pressure
Regular checks help maintain safety, fuel efficiency, and tire life. Follow these steps:
- Check tires when they are cold, before driving or after at least three hours of no driving.
- Use a reliable tire-pressure gauge.
- Inflate to the recommended cold pressures shown on the door placard (or in the owner's manual).
- Re-check all four tires after inflation and again after a short drive to account for temperature changes.
Note: The spare tire may have different pressure requirements; consult the manual if you plan to use the spare or store it for long periods.
Practical tips and sources
For precise values by tire size and trim (e.g., 17", 18", or 19" wheels), always reference the specific door-jamb placard on your vehicle and the owner's manual. The onboard TPMS (tire-pressure monitoring system) will alert you if a tire falls significantly below its recommended pressure, but it does not replace the need for regular manual checks.
Summary
In short, the 2018 Audi A4 generally uses about 33 psi for both front and rear tires when cold, with exact numbers varying by wheel size and load. Confirm the exact values on your car’s door placard or in the owner's manual, and adjust for load and conditions as needed to maintain safety, performance, and tire longevity.