Quick Answer: Before you order Audi) parking sensors in quantity, verify the OE part number stamped on the old unit, confirm the connector pin count, and check whether the housing needs paint. The OSRAM OS-PASA007 covers five Audi applications, but the stamped number on the failed sensor is still your best reference.
Bulk orders of parking sensors look straightforward until a batch arrives with the wrong connectors. Audi’s Parktronic system has been through enough revisions that a single model year can use different sensors front vs. rear. A 2013 A4, for instance, may carry a 3TD 919 275 on one corner and a 1S0 919 275 A on another — structurally identical, electrically different. That’s why the first rule for B2B buyers is simple: never order by car model alone. Pull the old sensor, read the OE number, and cross-reference it against the supplier’s supersession list.
The | OE# 3TD 919 275, 420 919 275, 4H0 919 275 A, 1S0 919 275 A, 1S0919275D](https://longweiparts.com/product/os-pasa007-osram-parking-sensor-fits-audi-oe-3td-919-275-420-919-275-4h0-919-275-a-1s0-919-275-a-1s0919275d/”>OS-PASA007) from OSRAM consolidates five OE references — 3TD 919 275, 420 919 275, 4H0 919 275 A, 1S0 919 275 A, and 1S0919275D — into one SKU. That consolidation is useful for a shop servicing multiple Audi generations, but it also creates a trap. Just because the supplier lists your OE number doesn’t mean every unit in the batch matches. Ask for the actual part’s stamped numbers on the packing list, and test one unit before committing to a larger quantity.
What to check before you order:
| Checkpoint | Why It Matters |
|---|---|
| OE number on old sensor | The only reliable reference; paint hides it, so scrape gently |
| Connector pinout | 3-pin and 4-pin versions look alike from outside |
| Housing color | Primed vs. black vs. pre-painted changes your install time |
| Bracket/clip style | Some Audi bumpers use metal clips; others use molded plastic |
| Supersession list | Verify the SKU actually covers your exact OE number |
On price, the math favors aftermarket. Genuine sensors run $60–90 per unit depending on the model, while the OS-PASA007 lands well below that — and for bulk orders of ten or more, the per-unit cost drops further. The caveat is quality control. OSRAM is an established name, which matters more here than with ignition coils or motors because parking sensors depend on a calibrated resonant frequency. A cheap no-name unit may physically fit but trigger false alarms or blind spots if the piezo element drifts off frequency.
For shops, the | OE# 3TD 919 275, 420 919 275, 4H0 919 275 A, 1S0 919 275 A, 1S0919275D](https://longweiparts.com/product/os-pasa007-osram-parking-sensor-fits-audi-oe-3td-919-275-420-919-275-4h0-919-275-a-1s0-919-275-a-1s0919275d/”>OS-PASA007) is a practical stock item precisely because it spans five Audi applications. Keep a couple on the shelf, and you’ll avoid the “come back next week” conversation with customers. Before you place that bulk order, confirm the supplier has actual inventory, request photos of the physical unit, and lock in the return terms. Those three steps separate a smooth restock from a pile of useless plastic.
Product recommendation: If you’re sourcing for a workshop or a B2B client, the | OE# 3TD 919 275, 420 919 275, 4H0 919 275 A, 1S0 919 275 A, 1S0919275D](https://longweiparts.com/product/os-pasa007-osram-parking-sensor-fits-audi-oe-3td-919-275-420-919-275-4h0-919-275-a-1s0-919-275-a-1s0919275d/”>OS-PASA007) gives you broad Audi coverage in one line item — just verify the OE stamp before you buy.
Bottom Line: Check the OE number first, verify the batch, and buy from a supplier who backs the part with real inventory. The OS-PASA007 covers the spread.
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