433MHz OE TPMS Sensor Audi A3 8P A4 B8 B9 e-tron Tyre Pressure Valve Stem

Audi builds its direct tyre pressure systems around one 433MHz sensor family, and that is why a single part number can serve the A3 8P hatch, the A4 B8 saloon, the A4 B9 and the e-tron. This OE replacement is supplied pre-programmed, so a workshop mounts it in the valve hole, inflates to the pressure shown on the fuel flap or door jamb sticker, then completes a standard OBD relearn and drives. The body is sealed to IP67 with a potted PCB, the valve is a rubber snap-in stem with a nickel plated core, and the pressure window runs to 900kPa, which covers the higher cold pressures used on the e-tron and on S-line wheel packages. Each batch is pressure cycled, leak tested and verified on a bench reader against the 433MHz European protocol before packing.

• 433MHz European protocol, matched to the Audi receiver rather than a generic band, so the new ID is accepted on the first drive cycle after the relearn.
• One part number across four chassis codes, which cuts dead stock for a workshop that services mixed Audi traffic.
• Pre-programmed, so no bench programmer and no blank sensor stock is needed before the car goes back on the road.
• IP67 sealing and a potted PCB rated from -40 to 125 Celsius degree, tested against road salt and pressure washing.
• 900kPa pressure ceiling that covers e-tron cold pressures and S-line wheel packages without sitting at the top of the scale.

• Independent Audi specialists handling A3 8P, A4 B8 and A4 B9 tyre and wheel work.
• EV workshops servicing e-tron wheels, where a quiet cabin makes the warning light impossible to ignore.
• Tyre chains replacing sensors cut or cracked during a tyre change on alloy rims.
• Export distributors supplying European market Audi parts to workshops and resellers.

Q: Does one sensor really cover the A3 8P, A4 B8, A4 B9 and e-tron?
A: On vehicles fitted with the direct TPMS option, yes. All four use the European 433MHz band and the same valve mounted sensor design. If a car was ordered without that option, it has no sensor in the wheel and the warning is handled by an indirect system instead.

Q: My e-tron tyre pressure warning came on with correct pressures. Is a sensor at fault?
A: Usually yes if the car is a few years old, because the cell has a 5-7 year life. Scan the four positions, replace the ones that do not report, then relearn and drive 5-10 minutes above 25km/h. On an EV, also confirm the pressures are set cold to the higher figures in the fuel flap label.

Q: Do I need a programming tool for these?
A: No bench programming. The sensors arrive pre-programmed for the listed applications; the relearn is completed with an OBD TPMS tool or through the vehicle menu, followed by a short drive.

Q: Can the same part be used front and rear?
A: Yes. Audi uses one sensor in every wheel position on the chassis listed here, so four pieces cover the vehicle with no left, right, front or rear variants.

Q: What are the MOQ and lead time?
A: MOQ is 50 pieces, stock ships in 5-7 working days, and bulk production with OEM laser marking takes 20-25 days.

Audi owners do not shop by part number; they search by model and chassis code, then look for a sensor that fits without a dealer visit. One pre-programmed 433MHz OE TPMS sensor answers the A3 8P, A4 B8, A4 B9 and e-tron request with a single line item, one relearn and no programming tool. Send us your quantity and chassis mix and we will confirm stock, packing and a shipping date the same working day.