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      09-20-2023, 12:41 PM   #1
saudisinaudis
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Do 840i's with the 330HP B58 require femto unlock too?

Does anybody have a clue? Guy crashed into my M440i a couple months back, totalled it, and insurance got me my money back. Now Iím looking for the next cop. Ive gotten addicted to the performance from just the BMW M-lite, and I canít picture myself driving anything with less performance. Next move was initially M3 comp, and it still is the primary move, and I love the grills on the M models so thats not a setback for me. Problem is, our BMW dealer in Saudi Arabia rarely imports M3ís, and special orders for some reason have been shutdown since COVID. Iíve been at their throats wanting to get one, but so far no luck, they have no access to place an order for me, and they cant promise if the next shipment coming in November will have an M3 (probably not. One guy there asked for me and they only told him thereíll be a CS, which I cant afford bcs Iím already stretching ny wallet). And the date for the shipment after that is yet to be disclosed/ nor are the cars coming with it).

Now, a monstrous looking 840i in sapphire black is tempting me at the dealership. Itís guaranteed, and I can sign the papers today and drive it home. However, itís heavier, and has 50+hp less than my M440i (330hp), which is a downgrade (in performance only). Now Iím considering adding a catless DP and tuning it to stage 2, but Iím not sure if tuning it is as much of a headache as with the M performance B58s, meaning Iíll have to ship my DME to finland, sit without a car for a couple weeks and sell half a kidney. I was thinking, could it be as straight-forward as 1st gen B58s since it has the same HP as theirs? And is the car as prepped for tunability as the M-lite B58s or do I have to change more than a downpipe?
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      09-20-2023, 09:48 PM   #2
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Quote:
Originally Posted by saudisinaudis View Post
Now, a monstrous looking 840i in sapphire black is tempting me at the dealership. It’s guaranteed, and I can sign the papers today and drive it home. However, it’s heavier, and has 50+hp less than my M440i (330hp), which is a downgrade (in performance only).
Don't buy a brand new 8 series because there's just too much depreciation in these cars. They are also very difficult to re-sell.

Would a used M850i be a better alternative?

Rob

Last edited by Rob_G77; 09-21-2023 at 04:53 AM..
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      09-21-2023, 08:10 AM   #3
saudisinaudis
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Originally Posted by Rob_G77 View Post
Don't buy a brand new 8 series because there's just too much depreciation in these cars. They are also very difficult to re-sell.

Would a used M850i be a better alternative?

Rob
Itís a used 840i, about 70k SAR cheaper than MSRP here ($18k). Milage is 700km, which is why I thought it would be a fine choice.
To put you in perspective, the M3 Competition (sometimes with bucket seats, sometimes not, but they standardize the price) goes for USD $140k here. The 700km used 840i goes for $112k in contrast.

M850i here costs $165k, the same price as an M5 Competition. M8 Competition goes for $186k.

I wouldnít go above USD $145k.
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      09-21-2023, 10:13 AM   #4
oem.plus_440gc
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If it is on the same ecu as the F3x cars with gen1 b58, you won't need a femto unlock, but you will either need a bench unlock by a shop or you can buy a device that can attach to the ecu and do the bench unlock process yourself.

The production date and ecu is the determining factor of if a femto unlock is needed. If the car hasn't had software updates in a while and its on the same ecu as the F3x b58 cars, its possible you won't need any unlock at all and could flash the car straight from a tuning platform like BM3 or MHD.
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Current: 2019 440i xDrive Gran Coupe - Alpine White, Coral Red Dakota Leather, 8AT, MSport, THP, BM3; 2015 X5 35i xDrive - Mineral White Metallic, Mocha Dakota Leather; Previous: 2015 Subaru WRX - World Rally Blue, Premium, FBO+Tune
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      09-21-2023, 04:58 PM   #5
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Quote:
Originally Posted by saudisinaudis View Post
Itís a used 840i, about 70k SAR cheaper than MSRP here ($18k). Milage is 700km, which is why I thought it would be a fine choice.
To put you in perspective, the M3 Competition (sometimes with bucket seats, sometimes not, but they standardize the price) goes for USD $140k here. The 700km used 840i goes for $112k in contrast.

M850i here costs $165k, the same price as an M5 Competition. M8 Competition goes for $186k.

I wouldnít go above USD $145k.
You could probably get it a lot cheaper too if you really want it.

Rob
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      09-22-2023, 01:27 PM   #6
saudisinaudis
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Quote:
Originally Posted by oem.plus_440gc View Post
If it is on the same ecu as the F3x cars with gen1 b58, you won't need a femto unlock, but you will either need a bench unlock by a shop or you can buy a device that can attach to the ecu and do the bench unlock process yourself.

The production date and ecu is the determining factor of if a femto unlock is needed. If the car hasn't had software updates in a while and its on the same ecu as the F3x b58 cars, its possible you won't need any unlock at all and could flash the car straight from a tuning platform like BM3 or MHD.
Well yeah thats why Iím asking, because itís the same HP as 1st gen B58 but prod. of this car Iím looking is 2023. Is it Gen2 ecu or Gen1?
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      09-22-2023, 01:28 PM   #7
saudisinaudis
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Quote:
Originally Posted by Rob_G77 View Post
You could probably get it a lot cheaper too if you really want it.

Rob
Well not locally, this is already $20k cheaper than Msrp for a barely driven car at 300miles and the car is very rare to find other than in the certified used department for BMW
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