02-27-2017, 01:13 PM | #68 |
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19,500 miles and 14 months after picking up my 340i, no real issues and haven't had to take it to the dealership for anything besides the normal maintenance.
I did get a low coolant warning but wasn't able to find a leak anywhere, I topped the coolant up and that's been the end of that so far. Coolant level is still right at the top after a few months. I absolutely love this engine and would recommend it to anyone interested. Also, MPPSK is 100% worth it. The power gains aren't huge, especially on 91 octane fuel, but the increase in smoothness and responsiveness is very real and the exhaust is a work of art. My car did run rough on cold start and would even feel like it was misfiring at times right after starting it up, this has gone away ever since I had the MPPSK installed. I don't know if the M kit software is based on a newer revision of the DME software (so maybe this is fixed on all 340s now) but cold starts are much smoother and this is very noticeable in a manual car like mine. |
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03-02-2017, 11:01 AM | #69 |
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16k miles, 9 mos
Dead A/C compressor Bummed.
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2021 M2C, HS / 6MT
2019 Mini Cooper S Hardtop 4 Door / 6MT 2022 Mini Countryman All4 JCW No longer with me: 2018 Golf R, 2017 F80 M3, 2016 F30 340i xDrive |
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03-02-2017, 11:50 AM | #70 |
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Were there any symptoms or warning signs?
I noticed when it got warmer out, the car was lurching noticeably whenever the compressor kicks in. Lurching a lot harder than I'd expect. Once it gets warmer again so it's noticeable I was planning on taking it to the dealer to be looked at. |
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03-02-2017, 01:50 PM | #71 | |
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Supposed to get the car back Monday/Tuesday... Driving a 320xi loaner in the meantime...
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2021 M2C, HS / 6MT
2019 Mini Cooper S Hardtop 4 Door / 6MT 2022 Mini Countryman All4 JCW No longer with me: 2018 Golf R, 2017 F80 M3, 2016 F30 340i xDrive |
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03-02-2017, 02:16 PM | #72 |
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Can you speak to whether the compressor kicking on/off was noticeable if you were idling at a stop? The compressor specifically, not auto start/stop... Engine already running, neutral or clutch depressed, the whole car could feel the shake from the A/C compressor engaging/disengaging. Is that normal, or do I likely have something wrong? (Like I said, not going to bother taking it into the dealer when it's 28F outside, they won't be able to reproduce. I will take it once it is warm again.)
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03-02-2017, 02:50 PM | #73 | |
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Yours sounds different/more serious. If the compressor clutch is frozen in an engaged state, and the belt can't turn the pulley, would that cause a problem like that? I'm not the right guy to ask I'm afraid.
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2021 M2C, HS / 6MT
2019 Mini Cooper S Hardtop 4 Door / 6MT 2022 Mini Countryman All4 JCW No longer with me: 2018 Golf R, 2017 F80 M3, 2016 F30 340i xDrive |
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03-02-2017, 06:06 PM | #74 | |
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03-03-2017, 08:48 AM | #75 |
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4500 miles and found out my turbo was leaking oil. Dealership replaced the whole turbo under warranty. Kinda concerning to have a car with such low miles have such a major issue. Dealership claimed it was a defective turbo and that they went went through the rest of the car and found no other issues
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2016 340i xDrive 6MT (regretfully sold)
2020 M340i xDrive |
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03-04-2017, 01:53 AM | #76 |
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Picked up a new F31 340i xdrive a couple of weeks ago from a dealer 400km (~4hrs) from home. Headed out with a smile and got 300meters (!) from the dealer when the 'drivetrain malfunction' light came on. Got back in limp mode to the dealer and then had to drive home the 400km in a loaner.
Got the car back one week (not a great week) later and the only explanation was that some kind of sensor had been replaced. Since then i have just passed the break-in at 2000km without any further issues except some interior rattles. My first "buy new" experience was not as i had imagined it. |
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03-10-2017, 12:11 PM | #77 |
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If someone were buying, not leasing, would it be a safer bet to go with the B48 or B58 at this point from a reliability standpoint? Since both of these engines are new, there's not much data, but maybe people who have seen the rollout of previous BMW engines can offer some insight.
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03-12-2017, 05:36 PM | #78 |
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Drives: 2003 M3
Join Date: Apr 2013
Location: MA
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Just rolled past one year and 15k (right on schedule with my lease) and all is well.
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03-12-2017, 06:35 PM | #79 |
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For years I had backed off the 335 for those HPFP nightmares and then even when they said it was fixed I backed off til the LCI then i thought what a dumbasp I was to try a new engine on its debut.. Looks like we hit the lotto cause its been very quiet (not the engine).. chalk it up to component engineering.. fingers crossed dont wanna jinx it but the B58 power and maybe reliable as well? |
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03-13-2017, 10:44 PM | #80 |
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0 issues with 15k mi already on my xdrive and AA 8 tune . Always drive aggressive, but responsible
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph. |
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03-15-2017, 09:38 AM | #81 |
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AGAIN!! Drivetrain Malfunction
1st time this happen was at 1500 miles
2nd time @5000K miles on the FWY cruising at 70, I needed to pass a truck so I stepped on it and Bam! Error message - Drivetrain Malfunction: Whats so weird is when this happens, the rear of the car feels like the rear end is going to fall out. pull off the Fwy, shut it down, 1min later re start all normal |
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03-15-2017, 10:13 AM | #82 | |
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03-15-2017, 11:24 AM | #83 | |
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My mods are JB4, intake and ER downpipe. I will feel better if you tell me your stock Anyways..same thing for me, turn the car off/on and it's like nothing ever happened. |
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03-15-2017, 01:01 PM | #84 | |
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Is this with your Dinantronics sport installed? |
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03-16-2017, 08:47 AM | #86 | |
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03-17-2017, 06:37 AM | #88 |
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