I have a doubt which one has if the 17011 or the 17025 or if they are the same sensor and only the code number changes. Which of the two is compatibl

17025 is a LSU 4.9 sensor 0-5v wideband reading

Is it normal for these to come "used" looking? The sensor end was very sooty and had obviously been run in a very rich exhaust?

These say on this page, but all the ones I've seen look used because they are each tested and "burned in", meaning they're required to perform under normal operating temperatures for some significant period of time without flaw or failure of any kind. I used to work in a place that made microwave radio equipment and we had to burn in each one, like 24 at a time, overnight, monitored by computer and tested at it's coldest range too. The data was monitored continuously and if any parameter drifted, then it was torn apart and adjusted and sent back through the burn-in test again, repeat. It seems like there's always one that can't be fixed. Those were recycled. But anyway, an oxygen sensor is required to work in some extreme temperatures. Heat can change things if even the slightest thing is vulnerable or flawed in any way. So, in my opinion, reading comprehension, plus experience, I'd be happy if I got one that looks burned in. If these other comments are correct, and they get shiny new looking sensors, that means YOU are their QC department. All the pictures of every sensor from every vendor looks browned. That said, you said it looks "sooty" and carbon comes off on your hands? That could mean that it had been installed in a rich running car, true. However, it may be that they didn't clean it after burn-in during QC. However, it better not be shiny as a brand new penny, because that means you're their QC department. I have had that happen. They kept asking for more pictures. I felt like I should be on the payroll, but in China, ..? Anyway, It's going to be a judgement call. I'm going to say that these should be tested in sooty conditions because that could happen on a cold day in any car. But it's pretty obvious that nobody cleaned it off. The question is why they didn't. If you were sneaking a bad part in a box, you'd think you'd clean it off, right? If I were you, I'd go with my gut feeling about it. If it's one of the more accessible ones, why not try it? It's not like you'll make it more sooty. One reviewer said "buy 2 so if one is bad, you can simply grab another." It does seem to me that the hardest part is getting everything ready to replace a part and clean up after. So maybe that is the best advice. Buy another 1 or 2 so that if that one is bad you need only try another while you're under there. Maybe this is why OEM parts are so expensive. They'd better work or there's hell to pay. I never thought of it in these terms. But a $20 one? Get 2. These aren't $20 so I suppose people return the extraneous ones, if they're good or bad. Either way, they're looking for a refund. You know? The more I think of this, the more complex it gets. Since you're going to return it anyway, try it but wait until you've got another, just in case. Sorry this was long. It's puzzling. Not as clear cut as the other answers. I don't think they've seen many of these. Even online, they're obviously burned. It's the soot that makes it complex.

Is this tha same as aem 30-2004 wideband?

Sure is. I buy these as replacements for the AEM

How many wires does this sensor have please? I need to attach it to an Air-fuel Gauge having 3 wires

That will not work no matter how many wires it has. Afr gauges are meant to be driven by a wideband controller. The sensor is the input to the wideband controller. The sensor isnt capable of directly controlling the gauge.

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⚡ Tune smarter, drive faster—Bosch precision in every breath.

TESTED FOR EXCELLENCE - Every sensor undergoes 100% functional quality testing with a seared protection tube for unmatched reliability.
PLUG PLAY PERFECTION - True direct-fit OE connectors and pre-coated anti-seize threads mean effortless installation and zero downtime.
PRECISION AIR FUEL MASTERY - Experience exact air/fuel ratio readings with Bosch’s advanced wideband sensing element—no more guesswork, only performance.
BUILT TO LAST BUILT FOR SPEED - Robust sensor design ensures durability that keeps up with your high-performance lifestyle and engine demands.
OPTIMIZED FOR HIGH PERFORMANCE - Specifically engineered for aftermarket wideband kits, giving your engine management system the edge it deserves.

The Bosch 17025 Oxygen Sensor is a premium wideband A/F sensor designed for high-performance aftermarket kits. Featuring advanced sensing technology for precise air/fuel measurement, robust construction for extended durability, and true direct-fit OE connectors with anti-seize threads, it ensures reliable, hassle-free installation and optimal engine management.

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Manufacturer	Bosch
Part number	17025
Item Weight	177 g
Product Dimensions	14.81 x 10.01 x 5.59 cm; 176.9 g
Item model number	17025
Size	17025
Colour	Narrowband
Style	Oxygen Sensor
Material	Metal
Item Package Quantity	1
Measurement Accuracy	HIGH
Plug profile	Flange Mount
Specific uses	Oxygen Sensor
Included components	Replacement Parts - Underhood;Engine Management;automotive-ambient-air-temperature-sensors
Batteries included?	No
Batteries Required?	No

Bosch 17025 Oxygen Sensor

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