The parts counter conversation goes like this: a customer drives a 2007 Audi A4 with the 2.0T FSI, and the low oil pressure warning lamp is flickering like a faulty fluorescent tube. You pull the DTCs—P052A or P052B, depending on the generation—and you know exactly which part you need. But here’s the question that separates a parts seller from a parts consultant: do you hand over the Audi-boxed sensor at $85, or do you grab the same piece from the VW shelf at half the price?
The answer, for a growing number of shops, is neither. They’re reaching for the OS-OPA013.
The Platform-Sharing Reality
OS-OPA013 | OSRAM Oil Pressure Sensor | Fits Audi, Volkswagen | OE# 038919081M isn’t just a cross-reference convenience; it’s a direct result of the Volkswagen Group’s MQB and PQ35 platform architecture. When Audi and VW share the same engine family—the EA113 and EA888 series, specifically—they share the same oiling system components. The 038919081M OE number appears on both an Audi A3 and a Volkswagen Golf GTI, sometimes with different suffix letters, sometimes identical.
This isn’t accidental. It’s cost engineering at its finest. Why tool up two different pressure sensors for the same M10x1 threaded port and the same 0.5-bar threshold when one design works across the entire group? The answer is that they don’t. Audi gets the four rings stamped on the plastic housing; Volkswagen gets the VW logo. Internally, the sensing element, the electrical connector, and the pressure switch point are identical.
What the OE Cross-Reference Actually Means
For the buyer, this creates an interesting market dynamic. You’re not buying a “cheap alternative” when you pick up the OS-OPA013; you’re buying the OEM-spec part without the dealer markup. The sensor operates on the same normally-closed principle: when oil pressure drops below the threshold, the switch opens, the ECU sees the change in resistance, and the warning lamp illuminates. The OSRAM unit matches that behavior precisely, which is why it appears in fitment databases for both the Audi A4 B7/B8 and the VW Passat B6, among the two listed applications.
| Specification | OS-OPA013 |
|---|---|
| OE Reference | 038919081M |
| Operating Pressure | 0.5 bar (switch point) |
| Thread | M10x1 |
| Connector | 2-pin, square bayonet |
| Brand | OSRAM |
| Cross-Platform | Audi, VW (EA113/EA888) |
The Failure Mode You Should Know
Here’s where experience matters. The original sensors from this era have a known failure mode where the internal diaphragm fatigues after roughly 80,000 miles, especially on cars that run long oil change intervals. The warning lamp doesn’t always come on immediately—sometimes it flickers at idle when the oil is hot and thin, then goes out as RPMs rise. This intermittent behavior sends many owners chasing oil pumps and pickup screens when the sensor is the sole culprit.
A quick diagnostic tip: hook up a mechanical gauge and compare readings. If the mechanical gauge shows healthy pressure (above 1 bar at idle when warm) but the dash lamp remains lit, the sensor is lying. Swap it out with the OS-OPA013 and move on. The job takes fifteen minutes on most Audi and VW applications, and you’ll need a 27mm socket and a torque spec of 15 Nm—don’t overtighten, or you’ll crack the plastic body.
Who Should Buy This, and Who Shouldn’t
If you’re maintaining an older Audi 2.0T or a VW 1.8T, this sensor is a direct replacement that saves you 30-40% versus the dealership counter. It’s also a sensible stock item for shops that service both brands, since one SKU covers a wide net of vehicles. If you’re working on a 2020+ MQB Evo car with a different connector style, this isn’t your part—check the fitment list, because the newer generations moved to a different pressure transducer design.
The market trend is clear: as the EA113 and early EA888 engines age out of dealer coverage, aftermarket suppliers like OSRAM are stepping in with exact-match components at sensible prices. For the independent shop, that means fewer SKUs on the shelf and more profit per sale. For the DIY Audi owner, it means the repair is finally affordable enough to do proactively rather than reactively.
When that oil pressure lamp flickers again—and it will—the OS-OPA013 is the part that makes the fix simple, regardless of which badge is on the grille.
Recommended Part: OS-OPA013 – OE-grade replacement, in stock now.
