10-25-2022, 07:40 AM | #1 |
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M340 tuned reliability / supporting mods
Hey folks,
I'm thinking of pulling the trigger on a low mileage used 2021 m340. How is the tuned reliability of these cars? I previously owned a fbo n54 335, and it was a nightmare... It spent more time in the shop then my driveway. I'm assuming the b58 is lightyears better then the n54. What kind of supporting mods are needed for a stage 2 tune? |
10-25-2022, 07:58 AM | #2 |
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You wont be able to flash that car without sending the DME overseas.
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2014 EBII 435ix - Stage 2+ Dragy: 0-60 3.61; 60-130 10.18
2020 MG M340ix - Dragy: 0-60 3.48 2018 LBB X4M40i - Stock Dragy: 0-60 4.85 |
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10-25-2022, 08:31 AM | #3 |
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How's the reliability of this platform?
After my 335, I swore I would never own another BMW again lol But the m340 has rave reviews, so I'm willing to try again. |
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10-25-2022, 09:36 AM | #5 |
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Thanks fellas.
I'm 98% sure I'm going to pull the trigger. Trying to decide which tune to go with. Bm3 looks interesting, how does that stack up with dinan and mission offerings? |
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10-25-2022, 10:14 AM | #6 |
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Do you realize you have to ship your ecu to Finland and spend $2k to unlock it? Only way you can run bm3.
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2014 EBII 435ix - Stage 2+ Dragy: 0-60 3.61; 60-130 10.18
2020 MG M340ix - Dragy: 0-60 3.48 2018 LBB X4M40i - Stock Dragy: 0-60 4.85 |
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10-25-2022, 10:54 AM | #7 | |
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Correct me if i am wrong, but even the earlier B58 engines from the F30 had great reliability. So the latter version in M340i's can only be even better |
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10-25-2022, 12:08 PM | #8 |
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10-25-2022, 12:21 PM | #9 | |
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I would research this topic before buying a car just to realize your only option is JB4 or to ship DME across the world for an unlock.' Also, yes the B58 is more reliable than the N54.
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2014 EBII 435ix - Stage 2+ Dragy: 0-60 3.61; 60-130 10.18
2020 MG M340ix - Dragy: 0-60 3.48 2018 LBB X4M40i - Stock Dragy: 0-60 4.85 Last edited by Insane435; 10-25-2022 at 12:31 PM.. |
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01-16-2024, 01:29 PM | #10 | |
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There are some software updates that have come in the last few months that can make this a nightmare, but generally speaking it was easy and fast for me. Reliability seems to be their main focus, followed by performance. Highly recommend Mission. I haven't dyno'ed, but the onboard computer in sports display says just under 500 LB FT of torque, and a little less on the horsepower. I have my factory cat installed, but running a Dinan intake and turbo inlet, as well as different spark plugs and Dinan coils |
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01-16-2024, 01:32 PM | #11 | |
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Today, 06:44 PM | #14 | |
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Prior to 06/2020, a simple bench unlock, which you can do yourself with MHD unlocker, is all that is needed. |
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