welcome back everybody mark with exotic car play place today we're gonna head
down to the BMW dealer have a look around and see how many diesels that we
can find now because the weather is what it is today's discussion is talking
about BMW diesel reliability and what kind of models now can you even find the
diesel engine in there are less and less diesel engines out there today as an
option and we're going to talk about some of the issues that you can find
with some of the diesel engines and why BMW is going the way they're going so
let's head down to the dealer and take a look
let's go down and get a quick snack we don't have a lot of time to run today so
we're just gonna stop off for some really really bad food
yeah whatever can you have a $5 McDouble meal there with a nice tea all those
SUVs already scoped them out there all gas jobbies either the 40i's the M
versions or they've got other different variations like X 328i or the you know
any other pretty much every other gas job' is available in all of these SUVs
but none of them are actually diesels see even this one here which I featured
on my last video talked about that is a 35i's searched and scoured through
this whole lot the only diesel I could find in this whole lot was this one
previous generation x5 black and it is the 35 d as you can see on the panel
there the only one in this whole lot that is a diesel why am i only able to
see the one diesel engined in this whole lot that's because there's currently
only four vehicles that utilize the diesel engine it's a 328d X Drive 328 DX
Drive touring of course the 540 D which uses a different engine of course and
the current x5 35 D those are the only four that used in the Canadian market
the diesel engine and so why is this well it's pretty obvious BMWs shifting
away from diesel engines largely because you know that all companies are really
trying to veer away you know the Volkswagen company got a real
shit-kicking a few years ago because of you know they're fabricating their
numbers so they took a beating they had to retract and pretty much
pulled out all their diesel engines from the marketplace you know Porsche is sort
of veered off to I mean all these brands are either staying away from completely
or discontinuing diesel engines probably partially because of the you know the
dirty footprint essentially that they apparent
use or create or also could it be a reliability issue they are a very
complex engine and with that comes reliability concerns which is what we're
going to talk about today so I'm gonna share with you today some of the
reliability concerns around the BMW diesel engines in general there's been a
couple that really really stand out in my mind and I'm going to give you the
lowdown and dirty on that and what the real issues were with those engines
now there's two engines that stand out in my mind number one being the N 47
that's the small little turbo diesel 4 cylinder engine that BMW produced for
quite a few years and they're often the numbering if you're not sure of what
kind of cars they go on virtually every model a 3 series 1 series 5 series X you
know X Drive X cars like the SUVs they're in a lot a whole host of
different vehicles throughout Europe and North America and of course the
remaining in a 2 0 or 2 8 but it would be like a 320 D for example or a 520 D
or you know any of those generational cars that have the 20 D next to them the
usually include the N 47 the N 47 was a problem engine now it was a great
performer now they weren't all garbage but there were a lot of problem n47
engines out there and the worst ones were to 2007 to 2009 with that model
years the 07/09 were the worst of the bunch and they suffered from timing
chain failures a bad chain can start resulting in some rattling noises or no
noise at all and the engine would just stop and it could sometimes stop right
while you're driving at speed which can contribute to a serious safety issue now
to add and to couple that with the you know additional issues with this is the
fact that you couldn't change out the chain as a preventative measure at least
not economically so because the chain was up against the firewall it usually
meant pulling the engine almost completely out to be able to do this
repair or this upgrade so that was a real big problem for BMW and even a
bigger problem for owners that sustained failures with that engine that engine
also had other issues like wastegate Springs that were sticky stick partially
open or closed and that would result in poorer fuel economy
boost boost casita boost leak and the car would sometimes run sloppily the
other diesel engine that I can speak to that really had a whole host of issues
was the m57 and it's found in a lot of different versions of the BMW lineup and
of course that's also the V that's also the diesel engine that I have in my e70
x5 so you'll find it in like a 335 D 535 d he'd find it in an X 535 d notice the
35 d that's typically that engine now that engine was a great powerplant to
add a lot of power and won a lot of awards in its day for engine of the year
it was a great engine in terms of overall performance and efficiency or
relative efficiency but it wasn't without its reliability issues and so I
can speak to a lot of these problems because a lot of these issues I've seen
personally because I own that vehicle so the first issue that was very commonly
known for these diesel engines the m57 diesel engines was carbon buildup they
would see a shit ton of carbon buildup issues and that would basically plug off
the EGR valve plug off a lot of the intake piping and the worst part was a
lot of times that carbon buildup went right back into the heads and to do a
proper cleanup you'd actually have to remove the heads well the problem with
that is two things two-fold number one is the cost to remove the heads any kind
of a shop to do that will charge you a fair chunk of change the problem too is
resealing it so you clean it you put it back together the gaskets were never
quite as good as the originals another issue I've had with mine and that was
commonly known for a lot of these was broken vacuum lines I mean there's
dozens if not hundreds of different little vacuum lines under the engine
compartment there and they all do different things for different reasons
and if any one or two or three of these lines decide to break or split or come
apart that can result in issues obviously a turbo engine is sensitive to
boost leaks and vacuum leaks but so is you know a diesel engine with this kind
of emissions plugged into it there's a lot of vacuum lines and when one of them
comes off as I saw it usually results a lot of labor time in the shop for the
mechanics to go through and try to troubleshoot the issue that in itself
creates a lot of labor costs and of course usually is not a serious issue
but it can cost you a lot of money for troubleshooting that's another issue
that was commonly known for these cars glow plugs another problem for these
machines and when the glow plugs went the problem with the glow plugs is then
themselves weren't overly difficult to change out and a lot of guys have done
videos on the do-it-yourselfers you know out of their garage they're able to
change the glow plugs mine went to which is typically well known glow plugs will
fail on those cars now the problem with this is not so much the changing of the
glow plugs or being able to do it yourself is there's a chance and there's
a high chance I've heard lots of cases where the guys try to undo the glow plug
and the ceramic portion snaps off inside the head of the engine that usually
remain usually means that you're taking that engine apart you're pulling the
heads off anyway and then you got to bust those things out from the inside
out a really expensive and painful proposition if the glow plug job goes
sideways on you the worst part is when I spoke to the dealer about changing my
note they literally told me I had to sign a
document that accepted that should that issue happen I would be on the hook for
additional costs so it's not that you're deferring your own failure to the dealer
they are protecting themselves buying shuffling off any of that potential
failure to you there could be extra costs involved in that even if the
dealers doing that repair another issue was the urea tank heater would fail
often this is a common failure for these cars for the 335 D and the 35 d x5 the
urea attack the urea is the liquid that you use for diesel exhaust fluid and if
this tank freezes up that usually means you're gonna have a freezing condition
gelling or just outright freezing and that can leave you in a lurch what you
end up getting and I've seen this before too is a high reductant pressure set
going on in there you'll get a code you'll get an engine code and that will
usually mean that you have a fault related to the urea if it's a high
reductant pressure that's associated to that that's a problem and that's usually
a problem once you hit about minus 25-30 degrees Celsius which I see usually
three or four times every single year driving this diesel the DPF the diesel
particulate filters and another area that's essentially your
liver that's the big filter that collects all the crap that's coming out
of the exhaust system that thing can plug off and when the DPF plugs off that
usually means you've got to manually take it apart either get one of those
little unique companies to do a manual clean-out which they can do and that
doesn't come exactly cheap either or you actually replace it outright and
actually I I had a concern there a couple years ago because I had a scare
that I I made a mistake and assumed I had that issue when I had some other
issue but I looked at that and I called the dealer for a price on a DPF well the
price was actually quoted me over $6,000 Canadian for a new filter plus the labor
is a pain to because the labor means you've got to get underneath the vehicle
take apart a bunch of the exhaust equipment for parts and labor for a DPF
replacement it's huge bucks it could be ten thousand dollars or more what a
painful deal do you know what the worst enemy is of the DPF plugging off short
trips if you're doing five ten miles a day back and forth to work or doing
little short journeys that's a worse thing for these diesel engines number
one you'll get tons of carbon in the intake number two you'll plug off your
DPF very very quickly the DPF needs to cycle it needs a long road trip it needs
to go through a full cycle and you notice ever when you get that real hard
stink out of the exhaust that's usually it's purging the DPF and it's cleaning
the system automatically now another problem with the BMW diesel engines at
least that I've experienced in the m57 which is in my e70 x5 happens to do with
cold weather starting so when you start your diesel BMW you pulse the start
button momentarily it then kicks on the glow plugs which actually run through a
cycle depending on how much glow plug preheat it needs the car will do it
automatically well by the time it uses that glow plug it sucked a lot of the
battery juice off the start and then you go for a start when the oil is really
heavy a lot of times it won't even start it'll crank a couple of times we're or a
couple of times and then it's over that is where you'll find the problem
you need a really strong battery the dealer said the best thing you can do
for yourself is have a fresh battery the problem is in four years I've changed to
batteries already because every year I hit that 3035 below and
that's enough to wipe out the battery because you're trying to start too many
times a glow plug and then starter just kills the battery completely
so basically wonder why there's not too many diesels on the market left or out
there in the dealership lot it's because in 2019 BMW essentially discontinued the
diesel engine you can find the residual from 18 s no more 19 really left so BMW
essentially has decided to go with plug-in hybrids instead kind of get on
that whole hybrid wagon and eliminate the diesel from the North American
market it's unfortunate because BMW is doing a few things like this just like
they're eliminating the manual transmission in the new upcoming
3-series which is going to be released later it's unfortunate that this is
starting to happen the diesel engine they're starting to get them to the
point where they're perfecting the technology the exhaust pipe is extremely
clean it's cleaner than most of my car in jar my gas engines and the car starts
well in most conditions unless you're in 30 below weather starts really nicely
it's quiet its powerful responsive very torquey so you can haul a lot of weight
with the diesel engines so they're finally getting to that point where it's
a desirable engine to use and now they're finally disbanding it so at the
end of the day our BMW diesels not reliable I'd say general is a rule
they're not that reliable there's a lot of ancillary issues they produce lots of
power they're quiet they're good on fuel but reliability isn't their game if
you're really worried about reliability you don't go for a diesel stick with the
mainstream but if you do want something that's a little bit more punchy
different you can go with 1,200 kilometers on a tank of fuel and you've
got lots of torque hey they're actually great great engines these diesel engines
that BMW puts out these days so hope you liked the video guys make sure you give
it a like thumbs up don't forget to subscribe to the channel I really hope
to see you guys real soon see you that bye bye
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