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Details
| Specification | Value |
|---|---|
| Brand | Borsehung |
| MPN | b12321 |
| Category | Air Quality Sensor |
OE numbers (2)
Search by this OE number to find compatible parts
- VAG—5Q0907643E
- VAG—5QJ907643
Where this part fits
Original-fit position for OE 5QJ907643. The red ring marks where this part installs on the vehicle.
About this product
The Borsehung Air Quality Sensor (B12321) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. Verified to fit AUDI, SEAT, SKODA, VW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 5Q0907643E, 5QJ907643. Matching these numbers confirms a like-for-like replacement with no loss of function. Borsehung is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
No equivalent parts found.
Air Quality Sensor Borsehung B12321 — compatible car models
| Car models | AUDI: Q4 E-TRON Sportback (F4N), Q4 E-TRON SUV (F4B); SEAT: LEON (KL1, KLG), LEON Sportstourer (KL8, KLD); SKODA: ENYAQ iV Coupe (5AC), ENYAQ iV SUV (5AZ), KAROQ (NU7, ND7), KODIAQ I (NS6, NS7, NV7), OCTAVIA IV Combi (NX5, PV5), OCTAVIA IV (NX3, NN3, PV3), SUPERB III (3V3), SUPERB III Estate (3V5); VW: GOLF ALLTRACK VIII (CG5), GOLF VIII (CD1, DA1), GOLF VIII Variant (CG5, DB5), ID.3 (E11, E12), ID.4 (E21), ID.5 (E39), TIGUAN (AD1, AX1), TIGUAN SUV Van (AD1) |
|---|---|
| Engines | 35; 1.0 TSI; 60; 50; 1.4 TSI; 2.0 TDI 4motion; 1.0 eTSI; 1st; GTX; 1.4 eHybrid; TDI 4motion |
| Year of manufacture | 2015-2024 |
| Manufacturer article number (MPN) | B12321 |
| OE part numbers | 5Q0907643E, 5QJ907643 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
Borsehung b12321 Air Quality Sensor
- 1x Air Quality Sensor
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Air Quality Sensor compatible with my car?
This Air Quality Sensor fits AUDI, SEAT, SKODA, VW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this Borsehung Air Quality Sensor have?
The package includes the Air Quality Sensor as described in the specifications above. Check the "What's included" section for a full list of components. If mounting hardware or accessories are required, they will be listed separately.
What OE part numbers does this Air Quality Sensor replace?
This Air Quality Sensor replaces OE part numbers: 5Q0907643E, 5QJ907643. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Air Quality Sensor cost?
This Borsehung Air Quality Sensor is available for £41.99. Air Quality Sensor prices vary depending on brand, specifications, and vehicle compatibility. Borsehung parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Air Quality Sensor?
Regular inspection of your Air Quality Sensor is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Air Quality Sensor?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Air Quality Sensor fitted by a professional mechanic.
Can I use this part as a replacement for OE 5Q0907643E?
Yes, this Borsehung Air Quality Sensor is a direct replacement for OE part number 5Q0907643E. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
