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2005 645ci
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Discussion Starter · #1 ·
ive been getting a dynamic drive error about every 2 weeks,,, code comes up as 5D5B , ars, pressure build up, front axle faulty…. system has fresh fluid, correct type and level, havnt replaced the reservoir yet though…. slight seepage at the hydraulic fittings,,, level doesnt drop and no stains on the ground… new battery and ivm,, alt is 1 yr old,,,, just ordered lighter gauge to monitor voltage in real time…. am i forgetting anything??
 

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Discussion Starter · #3 ·
yup, after 15-20 mins , not every time though. i will data log the voltage for the next few days till the error appears…alternator is about a year old, new valeo from fcp, i did have an upper left timing cover oil leak after it was replaced though….when the alternator was originally bad i did get dynamic drive errors but other errors also…. thx for the lead
 

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Discussion Starter · #5 ·
ive been logging the voltage for the last few days, steady between 13,8 and 14…. no drive errors… my laptop with the bmw software crashed so i connected my scanner,,,, it had a function to relearn and rezero the front axle pressure sensor which i did a few times,,, still gonna change the fluid reservoir as a maintenance item though…. still too early to tell if resolved
 

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Discussion Starter · #22 ·
Automotive lighting Hood Motor vehicle Automotive design Automotive mirror

no error but it looks like there is a voltage issue… about 5 mins into a 30 minute drive the voltage dropped to zero for a second or less…..since i just replaced the reservoir im not gonna replace the alternator or regulator yet, id like to see if the error returns first
 

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Discussion Starter · #24 ·
found an issue: my battery was listed as the wrong capacity and not charging correctly, its a 100ah agm and was listed as a 90ah agm,,, state of charge averaged 56% / 12.1v at rest and even got down to 48% 4 days ago, changed it to 105ah agm and SOC is now 76% and 12.5v at rest,, heading in the right direction!
 

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Discussion Starter · #26 ·
BMW owners have an uphill battle when replacing the battery with a different type,, in researching the process i found ALOT of different procedures, opinions, advice etc…. across many models! i did find this on the e90 board which spelled out the system facts and references the e63/e64 specifically
 

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231 Posts
Discussion Starter · #28 ·

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Discussion Starter · #29 ·
finally registered and coded!
reading the link above…. what is the choice for the N62?


Appendix A:
MSV70,MSV 70.0 for N52 (NG6),
MSV80,MSV 80.0 for N52KP (NG6),
MSD80,MSD 80.0 for N43 N53 & N54 with EWS4/CAS,
Mevd172KW, Mevd 172 for N55 (Older N55***8217;s up to late 2011 production)
Mevd176k, Mevd 176k for N55 (late 2011 production date or newer)
MSS60,MSS60 for S65 (M3),
 

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Discussion Starter · #31 ·
haven’t had a dynamic drive error in weeks, but sitting at idle it popped up again accompanied by 2DEB: power management….. so finally ordered a replacement alternator (fcp free lifetime replacement) and found the valve cover was leaking onto the alternator,,, pulled the cover and replacing the gasket and orings…. fingers crossed!
Motor vehicle Hood Automotive design Vehicle Car

Land vehicle Tire Automotive tire Motor vehicle Hood

Crankset Automotive tire Gear Motor vehicle Differential
 

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Discussion Starter · #33 ·
i did the upper timing cover a few months ago, that cured most of my leak,, apparently the valve cover was leaking at the corner right over the regulator,,, valve covergasket was brittle and worn. alt is new… putting it back together next week
 

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Discussion Starter · #36 ·
running good except: belt squeal,,, tensioner seems to have failed, it’s noticeably weak, ordered a new one, belt and idler. have a code, 2B65 camshaft sensor 2 outlet.
valve cover is sealed which is great, i noticed the hydraulic line has a connection right above the alternator, im gonna sleeve it just to prevent any more fluid from getting into the alternator as it seems to be critical to the operation
 
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