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      11-10-2019, 12:25 PM   #1
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Has my M4 been tuned?

Hi all,

Been a member quite a few years but recently purchased an M4 coupe.

The sport displays show an increased BHP reading and some research suggests it shows higher than standard when it’s been tuned.

What does the collective experience here think has been done to my car


It was not mentioned by the dealer and I’ve not been able to contact previous owner. Standard exhaust except black tips.





Cheers

Jon
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      11-10-2019, 12:35 PM   #2
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Yes, it's been tuned. Guessing it was not a BMW dealer. Perhaps they did not know.

Depending on how you feel about this knowledge, I'd think you'd be within your rights to ask them to either return the car or have it inspected by BMW. Personally, I wouldn't want a car that had been tuned by a previous owner. You have no idea how well they did or how the car was treated.
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      11-10-2019, 12:40 PM   #3
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Quote:
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Yes, it's been tuned. Guessing it was not a BMW dealer. Perhaps they did not know.

Depending on how you feel about this knowledge, I'd think you'd be within your rights to ask them to either return the car or have it inspected by BMW. Personally, I wouldn't want a car that had been tuned by a previous owner. You have no idea how well they did or how the car was treated.
It was a garaged car with just 5600 miles when I bought it. 2015 DCT with great options. It looks like a new car and previous owner spent a packet on upgrades. Rear lights etc.

I bought it 3 weeks ago so within the time frame to return but I only realised today when I changed the sport display to BHP from KW. It did say 480kw so a quick look and I assumed it was standard.

Jon
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      11-10-2019, 12:43 PM   #4
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Looks like it has some sort of suspension work and spacers as well.
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      11-10-2019, 12:49 PM   #5
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Quote:
Originally Posted by blues n twos View Post
It was a garaged car with just 5600 miles when I bought it. 2015 DCT with great options. It looks like a new car and previous owner spent a packet on upgrades. Rear lights etc.

I bought it 3 weeks ago so within the time frame to return but I only realised today when I changed the sport display to BHP from KW. It did say 480kw so a quick look and I assumed it was standard.

Jon
Ok, on second thought, this may just be a really old version of iDrive/iStep.
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      11-10-2019, 12:50 PM   #6
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Quote:
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Looks like it has some sort of suspension work and spacers as well.
I spotted eibach springs and I’ve taken the spacers off.

Didn’t realise at first as there was a decent gap between arch and tyre.

Spacers were black on black wheels so also not spotted when viewing.
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      11-10-2019, 01:57 PM   #7
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Quote:
Originally Posted by blues n twos View Post
I spotted eibach springs and I’ve taken the spacers off.

Didn’t realise at first as there was a decent gap between arch and tyre.

Spacers were black on black wheels so also not spotted when viewing.
Hi

Bm3 Stage 1 was updated on 19/10/20, sports displays were recalibrated to what you're showing. Pretty poor of the guy not to put it back to stock. Your BM dealer will have to look into it further as just plugging their comp into your car won't throw up the BM3 tune.
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      11-10-2019, 02:10 PM   #8
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Quote:
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Hi

Bm3 Stage 1 was updated on 19/10/20, sports displays were recalibrated to what you're showing. Pretty poor of the guy not to put it back to stock. Your BM dealer will have to look into it further as just plugging their comp into your car won't throw up the BM3 tune.
Thanks for advice is there anyway to find out what’s been done by computer diagnostics or does it need to be dyno’d to know for sure

I'm wobbling as only had it 3 weeks and may reject car. Trouble is it took me ages to find one this well spec’d. Such low mileage as well.

Jon
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      11-10-2019, 02:48 PM   #9
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Quote:
Originally Posted by blues n twos View Post
Thanks for advice is there anyway to find out what’s been done by computer diagnostics or does it need to be dyno’d to know for sure

I'm wobbling as only had it 3 weeks and may reject car. Trouble is it took me ages to find one this well spec’d. Such low mileage as well.

Jon
Just go WOT and record/watch the gauges. If you see anything over 450ish HP, it's tuned. I don't think there is an easy way to tell otherwise.
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      11-10-2019, 02:50 PM   #10
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Quote:
Originally Posted by Kev608 View Post
Just go WOT and record/watch the gauges. If you see anything over 450ish HP, it's tuned. I don't think there is an easy way to tell otherwise.
Will do, I’ll keep an eye on sports display and record it all.

Cheers

Jon
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      11-10-2019, 02:58 PM   #11
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Why not send the Vin to BM3 and ask them to tell you whats been flashed?
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      11-10-2019, 03:04 PM   #12
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Why not send the Vin to BM3 and ask them to tell you whats been flashed?
Great idea. Will get in contact with them
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      11-10-2019, 03:08 PM   #13
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Quote:
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Why not send the Vin to BM3 and ask them to tell you whats been flashed?
That's fair, but keep in mind that a "yes, it was flashed with" whatever tune doesn't necessarily mean it is still flashed. Also, it's possible something else was used to tune it and a "no" from them wouldn't be definitive.
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      11-10-2019, 03:13 PM   #14
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Quote:
Originally Posted by Kev608 View Post
That's fair, but keep in mind that a "yes, it was flashed with" whatever tune doesn't necessarily mean it is still flashed. Also, it's possible something else was used to tune it and a "no" from them wouldn't be definitive.
Still worth it. Someone else just stated that's what the flashed gauges look like so there's an excellent chance its still flashed. And if they are willing to share what tunes were downloaded etc, that's a plus.
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      11-10-2019, 03:41 PM   #15
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Quote:
Originally Posted by blues n twos View Post
Will do, I’ll keep an eye on sports display and record it all.

Cheers

Jon
Take the advice and contact Halim at BM3. Tell your dealer you suspect the car has a tune and why would the sports displays be showing what they are if it did not. Is it an AUC motor, if so your laughing.
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      11-10-2019, 03:45 PM   #16
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I’ve emailed my vin to bm3 customer services with a summary.

Will let you know what they come back with either way.
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      11-10-2019, 04:19 PM   #17
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Deffo been mapped.
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      11-11-2019, 10:45 AM   #18
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It being flashed isn't necessarily a bad thing. You can still have it inspected by a certified mechanic to just make sure nothing is ticking, no knocks, doesn't sound like a spun bearing, or even spun hub and the timing is off. They will check to make sure the diff and trans is operating properly as well. If there is already a BM3 tune on it then maybe Halim or Dezeno will email the original owner and get him to transfer the tune package into your name. There is all sorts of ways to handle this and look at it.
If the car checks out mechanically and you want to keep it tuned then you are already thinking about correcting the crank hub issue. If it is certified or you have an extended warranty and you find out it is flashed then you have a decision to make and what type of risk you want to take.
Good luck, beautiful car!
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      11-11-2019, 10:52 AM   #19
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Quote:
Originally Posted by blues n twos View Post
I’ve emailed my vin to bm3 customer services with a summary.

Will let you know what they come back with either way.
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      11-11-2019, 12:37 PM   #20
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Thanks for all the advice

Bm3 has been back in touch asking for proof of ownership etc so I have sent them the requested documents and I’m awaiting a reply.

Will keep you posted on developments.

Jon
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      11-11-2019, 12:46 PM   #21
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      11-11-2019, 12:54 PM   #22
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If the car artificially burbles it's definitely been tuned. Non Zcp m4s/m3s don't burble unless tuned.
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