09-01-2020, 04:22 AM | #1 |
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XHP TCU Flash Detection
Straight from XHP support:
"xHP cant be detected by any BMW tool they use at the moment. The only thing what they see is that you cleared the fault history but this does not have a effect for warranty cases as its not illegal to delete the fault history. Our Software is also Read protected so BMW cant download the xHP file from the Transmisson but they can overflash our Software with they tools when they do a Service or Update to the car." Sounds great... Anyone buying into this? I know the guys at XHP do amazing stuff... but almost seems too good to be true. Would love to hear some thoughts.
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09-03-2020, 04:28 PM | #2 |
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Anyone? Also is there much benefit if not remapped?
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09-03-2020, 08:42 PM | #3 |
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I have been using it since I got the car a few months ago, so far no problems - but I've just got out of warranty last month. You'll just have to reflash it if it gets erased. Or just go back to stock, it takes seconds to do with the MHD wifi flasher.
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09-03-2020, 09:52 PM | #4 |
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Haha nice to see you again. Did you have it on stock flash? Or did you have ECU tune with it? Are you buying the whole, "not detectable" thing and do you think it affects reliability and upshift burble noises significantly? Thanks!
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09-06-2020, 12:14 AM | #5 |
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09-06-2020, 08:51 AM | #6 |
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Hey mate,
I think everything depends on how you treat the car regardless of TCU flash or not. I had it on stock ECU with xhp stage 2. Detectability isn't a concern anymore since I'm out of warranty but I'd just use caution not to beat too hard on it. I know it's hard, these cars love moving lol. |
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09-06-2020, 09:10 AM | #7 |
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One thing to give a bit of thought to is as if about a month ago, BMW is now detecting previous piggyback turbocharged engine tunes even if the piggyback is fully removed prior to service.
They are finding this by the engine automatically labeling itself as "tampered" when the max boost is pushed over what the max boost was from the factory. This instantly causes a void in the engine and drivetrain warranty. I'm unsure how the flash from OP works, but I'd dive deep into this if you're worried about warranty at all.
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09-08-2020, 11:43 PM | #8 | |
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09-08-2020, 11:49 PM | #9 | |
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09-09-2020, 12:56 AM | #10 |
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It is unlikely a dealer tech would be able to tell if an ECU/TCU tune had been removed if write counters have been reset properly. If there is a major problem, though, the ECU/TCU Is likely to be sent back to the manufacturing plant for fault analysis, at that point bench data extracted that may not be accessible via an OBD port flash would likely show changes from the original manufactured state. I would be surprised if there isn’t out-of-band (i.e. not in the remote flashable EEPROM) count and checksum information and in some cases time related information in any modern ECU, if not just to protect system integrity as opposed to tampering detection.
Although my manufacturing fault analysis goes back to mid-frame disk drives in the late 80s, even then we could obtain a lot of change data from the device from bench analysis in our lab and manufacturing plant, that could not be accessed via the drive’s interface. |
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09-09-2020, 05:27 AM | #11 |
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I've asked it in other threads, and nobody seems to respond...
So then, I'll ask again! Why not just get an ECU, same make/model from pick & pull or wherever, and swap it, flash that one and preserve the original in unmolested state. Then if there's a problem, a simple swap back to stock is all that's needed. No? What other modules, record and store information? That is the question... As for XHP... I can't see how changing shift points and maybe line pressures would void a warranty unless torque protections were disabled. Just my $.02... |
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09-09-2020, 02:06 PM | #12 | |
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09-09-2020, 02:08 PM | #13 | |
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09-14-2020, 04:03 PM | #14 |
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Well, what reference dates? I'm talking about having an extra ECU for any interactions with the dealer as well. You bring it in for service, swap it out, as long as the ECU isn't getting any OTA updates, it would work fine. And I doubt the ECU would get OTA updates as it's too critical that if something weren't to take properly, there'd be bigger problems for them.
Anyways, it's funny how the keyboard experts are all silent on this particular method Lol |
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09-14-2020, 04:56 PM | #15 | |
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09-14-2020, 06:58 PM | #16 | |
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09-15-2020, 12:29 PM | #17 | |
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09-17-2020, 05:51 PM | #18 |
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No one seems to have an answer to this.. I'd love to just take XHP's word for it but it is their product lol...
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10-04-2020, 09:55 PM | #19 |
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10-05-2020, 08:23 AM | #20 |
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I can't answer the question about detecting xHP.
Quite possibly xHP are correct in saying "not at dealer level at this present moment". But I would think ZF would pick it up if there was a failure and were asked to warranty a new gearbox. It's possible they could deny the warranty, which BMW would pass forward. It's worth mentioning that the ZF8 is almost bulletproof, so risks are low. But I digressed, I had xHP on my stage 2 tuned, and all I can say is "Meh!" Went straight to stage 3 and struggled to tell any kind of difference. |
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10-05-2020, 07:02 PM | #21 | |
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