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E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm}


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Old Tue, Feb-26-2019, 02:42:06 PM   #1
Captain Kirk
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Default Another boosted 335i or an M3

I'm at a place where I need to make a decision and it boils down to reliability. I am not a BMW mechanic but I can stumble through most things if there is a YouTube to point the way. I am comparing buying another 335i vs an M3. It doesn't take much to do the cat-less downpipe/JB4/coil over/exhaust mods and I can have equal power on a one owner car that has 25K miles, but this option enhances the BMW which is already a code throwing monster.

OR, I can spend $10K more and find a mid-40K mile car that has likely seen more than one owner, get the rod bolts/bearings done, fix the vanos as well, and have a bone stock M3 and be happy. What I don't know is this - is the M3 just as much a code throwing monster? The 335i makes better power down low and is fairly reliable between 20K miles and 80k miles, then it's time for some expensive gasket replacement and a few other things, but the large items are stable. If I go with an M3 6-Speed, that removes the horror of the DCT and aside from the two items I've already mentioned, in stock form, is it fairly reliable?

I'm genuinely asking for some solid perspective. I've already got the BMW needle in my arm so please don't tell me to go buy a Toyota. I get the brand to some degree and know I am signing up for a lot more than if I were to buy a mainstream vehicle. Help me understand the E92 M3 please.
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Old Tue, Feb-26-2019, 08:24:10 PM   #2
pbonsalb
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Default Re: Another boosted 335i or an M3

My 08 E90 M3 with 95k miles has been very reliable in the 8 years and 65k miles I have had it. I did change rod bearings as preventative maintenance, but that cost about $500 in parts and 10 hours of my time. Throttle actuators are $350 rebuilt or $600 each new and may have already been changed on a car you buy. Takes a couple of hours. Other things have been minor—a fuel pressure sensor, brakes $1000 for just parts, battery, ground straps, fluids and filters, a few suspension bushings. No vanos issues with the S65. Mine has all the bolt on mods for about 10-15% more power. Really wakes the car up.

I have also have had an N54 engined car, an 08 E61 535xi, for 8 of its 10 years and 110k of its 140k miles. Great car as well. Has only a JB4. Nothing major on that car, but I have done a lot of maintenance. OFH and cooler gaskets, VC gasket, coils, fluids and filters, carbon goo cleaning, auto pan and mechatronic seal, one AWD front axle, front struts and bearings, some suspension bushings, electric coolant pump, etc. Nothing impossible for a good DIYer.

Totally different power delivery. It’s always right there with the 6AT 535xi. You have to flog the 6MT to get the exciting power in the 6000-8000 rpm range. DCT would make it a lot easier. M3 handles better, but for those who don’t live in mountains or canyons or on racetracks or windy roads, the better handling does not matter so much. I won’t knock the 335i. But I bought the M3.

Last edited by pbonsalb; Tue, Feb-26-2019 at 08:28:42 PM.
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Old Tue, Feb-26-2019, 08:32:54 PM   #3
Captain Kirk
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Default Re: Another boosted 335i or an M3

Quote:
Originally Posted by pbonsalb View Post
My 08 E90 M3 with 95k miles has been very reliable in the 8 years and 65k miles I have had it. I did change rod bearings as preventative maintenance, but that cost about $500 in parts and 10 hours of my time. Throttle actuators are $350 rebuilt or $600 each new and may have already been changed on a car you buy. Takes a couple of hours. Other things have been minoróa fuel pressure sensor, brakes $1000 for just parts, battery, ground straps, fluids and filters, a few suspension bushings. No vanos issues with the S65. Mine has all the bolt on mods for about 10-15% more power. Really wakes the car up.

I have also have had an N54 engined car, an 08 E61 535xi, for 8 of its 10 years and 110k of its 140k miles. Great car as well. Has only a JB4. Nothing major on that car, but I have done a lot of maintenance. OFH and cooler gaskets, VC gasket, coils, fluids and filters, carbon goo cleaning, auto pan and mechatronic seal, one AWD front axle, front struts and bearings, some suspension bushings, electric coolant pump, etc. Nothing impossible for a good DIYer.

Totally different power delivery. Itís always right there with the 6AT 535xi. You have to flog the 6MT to get the exciting power in the 6000-8000 rpm range. DCT would make it a lot easier. M3 handles better, but for those who donít live in mountains or canyons or on racetracks or windy roads, the better handling does not matter so much. I wonít knock the 335i. But I bought the M3.
Thanks for some perspective. It's appreciated.
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Discussing Another boosted 335i or an M3 in the E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) Forum - {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm} at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)