A-Premium O2 Oxygen Sensor for Audi & Volkswagen — Heated 4-Wire Threaded Downstream Replacement

The A-Premium O2 oxygen sensor is a direct-fit, heated downstream threaded replacement designed to restore accurate exhaust oxygen readings on many Audi and Volkswagen models.

This replacement oxygen sensor (part references 250-24672 / 350-34223) is a 4-wire, heated, threaded unit sold individually in boxed packaging. It's engineered for downstream (and specific center/rear) locations across a broad range of Audi A3/A4/A5/A6/Q3/Q5/TT RS/Q7 and Volkswagen Beetle/Golf/Jetta/Passat/CC/Tiguan/Touareg/Eos models listed below. The sensor’s male connector and four terminals provide the heated functionality modern engine management systems expect.

Which cars and engine types is this A-Premium O2 sensor compatible with?

This sensor fits many model years and engine variations; check the exact fitment line for the specific mounting position (downstream, center or rear). Compatibility spans 4- and 5-cylinder gasoline engines and several V6/V8 variants across Audi and Volkswagen platforms.

• Audi examples: A3 (11–13), A4 (09–16), A5 (10–17), A6 (12–15), Q3/Q5, TT RS and specific Quattro models.
• Volkswagen examples: Beetle, Golf, GTI, Jetta, Passat/Passat CC, Tiguan, Eos and Touareg fits across various years and engine sizes.
• Mounting positions: downstream, downstream rear/center right, center and side-specific downstream L/R depending on model.

How does this heated four-wire sensor benefit my vehicle's performance?

A heated 4-wire oxygen sensor achieves operating temperature faster than an unheated unit, improving fuel trim responsiveness and emissions control after cold starts. Faster warm-up reduces time the engine runs in open-loop, letting the ECU use precise oxygen feedback sooner.

• Heater circuit speeds sensor readiness and accuracy.
• Four-wire design separates signal and heater power for stable readings.
• Threaded mount provides a direct, leak-resistant installation.

What should I expect during installation and electrical connection?

Installation uses the sensor’s threaded mounting and a male 4-pin connector that plugs into the factory harness; basic hand tools and an oxygen sensor socket are typically all that’s needed. Always verify the correct sensor location (downstream, center or rear) for your vehicle before installation.

• Threaded mounting matches factory ports—no custom fitting required.
• Male 4-terminal connector mates with the vehicle harness for plug-and-play convenience.
• Supplied individually in a box with one sensor per package for easy replacement.

How do I confirm the right part number for my vehicle?

Cross-check your vehicle’s original oxygen sensor reference against A-Premium part numbers 250-24672 or 350-34223 and verify engine displacement, year and mounting location. If your vehicle has codes or symptoms pointing to a downstream or center O2 sensor, match those specifics to the listed fitment lines.

• Reference numbers included: 250-24672, 350-34223 for quick compatibility checks.
• Confirm engine size and year against the detailed fitment lists supplied above.
• When in doubt, consult your vehicle VIN or a trusted parts lookup tool before purchase.

Who is this for: This A-Premium sensor is intended for DIY mechanics, independent repair shops and fleet technicians who need a reliable, direct-fit downstream or specified center/rear oxygen sensor replacement for Audi and Volkswagen vehicles. It’s suitable for owners replacing a defective O2 sensor, troubleshooting emissions or restoring correct fuel trims after exhaust repairs. Confirm the exact model year, engine size and sensor location before ordering to ensure a proper fit.