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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > How Long Do Stock Turbos Last?



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      12-01-2009, 04:05 PM   #1
BayMoWe335
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How Long Do Stock Turbos Last?

Did a little reading and came to about 60,000 miles under normal circumstances (no tune or increased boost).

Is 60,000 miles a fair assessment for the 335i turbos? How much to replace them?

Has anyone had them replaced within the 4 yrs/50,000 miles?

I do plan on keeping my car well beyond 60k miles. Just trying to see what's on the horizon.

Thanks!
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      12-01-2009, 04:09 PM   #2
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Quote:
Originally Posted by BayMoWe335 View Post
Did a little reading and came to about 60,000 miles under normal circumstances (no tune or increased boost).

Is 60,000 miles a fair assessment for the 335i turbos? How much to replace them?

Has anyone had them replaced within the 4 yrs/50,000 miles?

I do plan on keeping my car well beyond 60k miles. Just trying to see what's on the horizon.

Thanks!
When my car was new, I had zero intention of having an extended warranty. Then my car died twice and a guy at the gym told me his turbos and injectors were replaced under warranty, and that woulda been like $9800 without warranty coverage. Needless to say, I don't think anybody knows the real answer, and so we have to pay north of 3k for an extended warranty....
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      12-01-2009, 04:16 PM   #3
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that's a scary thought... 9800$? wow...

well, just don't beat on it i guess.
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      12-01-2009, 04:19 PM   #4
BayMoWe335
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GOOD LORD!! $9800? I will be purchasing the extended warranty.

How soon do I need to do that? I am the original owner of my 2010 335i
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      12-01-2009, 04:19 PM   #5
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I would say that replacing turbos with new one would cost between 4-5000 USD including installation time.
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      12-01-2009, 04:22 PM   #6
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Where did you determine 60k? I'm not arguing with you.

What about all the people w/ 60k+ tuned on their first set. They're mitsubishi's and should last well over 60k.
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      12-01-2009, 04:25 PM   #7
BayMoWe335
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Quote:
Originally Posted by ianthegreat View Post
Where did you determine 60k? I'm not arguing with you.

What about all the people w/ 60k+ tuned on their first set. They're mitsubishi's and should last well over 60k.
I didn't know they were Mitsu turbos. Really? I also haven't seen many over 60k miles. Can you direct me to a thread discussing that? Might need to get a tune afterall.

I can't say where I got 60k...just did some reading and saw that pop up a few times. TOTALLY a guess and from memory.
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      12-01-2009, 04:30 PM   #8
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its a question we all like to know. either way im getting rid of mines. =]
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      12-01-2009, 04:34 PM   #9
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I believe things are designed to go 100,000 miles minimum (all the way down to emissions equipment).
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      12-01-2009, 04:44 PM   #10
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Quote:
Originally Posted by s1cke92 View Post
its a question we all like to know. either way im getting rid of mines. =]
I have to reference jpsimon's sig here.

"The Next Step in n54 Technology: It's coming."

I hope I'm reading this as satire w/ all the "turbo releases" promised.
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      12-01-2009, 04:47 PM   #11
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it all depends how you use the car. drive on the ring every weekend full blast and the turbos wont last long even stock.
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      12-01-2009, 04:50 PM   #12
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turbos should definitely last longer than 60k!!!

failures have occurred before 60k, sure it happens but as long as you maintain your car and you don't consistently overwork the engine, you'll be fine for typically a lifetime of the car.
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      12-01-2009, 04:51 PM   #13
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also shouldn't cost more than $2k.
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      12-01-2009, 05:00 PM   #14
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Really??? 60k miles??? that doesnt sound right
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      12-01-2009, 05:02 PM   #15
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Quote:
Originally Posted by BayMoWe335 View Post
Did a little reading and came to about 60,000 miles under normal circumstances (no tune or increased boost).

Is 60,000 miles a fair assessment for the 335i turbos? How much to replace them?

Has anyone had them replaced within the 4 yrs/50,000 miles?

I do plan on keeping my car well beyond 60k miles. Just trying to see what's on the horizon.

Thanks!
There are always better options when the warranty has expired than leaving the car to an authorized stealer. 335 turbos are cheap on ebay, even low mileage units, which normally sell for about $500. They could also be rebuilt for improved performance and wear resistance. The weakest point (on early units) is probably the WG-bushing, which could be rebuilt by any turbo shop for a reasonable amount. The replacement of turbo aggregates in the car is not rocket science, it is either to roll up the sleeves or leave it to a trusty mechanic that will probably fix it in a workday.

Another ugly issue with 335s are failing HPFPs. This is easy to change for any backyard mechanic and the unit cost about 1k from Tischer if my memory serves. Fuel injectors may also be a weak point. I havent seen the cost for these though and they need to be manually calibrated to the engine by ECU-setting according to BMW.

There are definitely reasons to be concerned for owning a 335 with expired warranty for people that are not inclined to fix things themselves.
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      12-01-2009, 06:23 PM   #16
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Quote:
Originally Posted by John 070 View Post
...a guy at the gym told me his turbos and injectors were replaced under warranty,
After how many miles?

There are two sides to the question here.

Stock or modified? You can't answer the question with an absolute without qualifying the question first.

60k is well within the midlife of this entire setup.
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      12-01-2009, 07:06 PM   #17
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good point stock or mod...I recall seeing some folks having there turbos replaced on this forum like 2ppl, but I'm pretty sure it was on modded cars.
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      12-01-2009, 07:08 PM   #18
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The stock turbos on my 2001 S4 lasted for 140K miles... at which point I sold the S4 for my 335i. Although I did not "chip" my S4, and only attended one track event.

I treated my S4 turbo's nicely, and they returned the favor! :-)
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      12-01-2009, 07:15 PM   #19
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I just found out that Ilma replaced his turbo's by dealer...I hope he comments here about it
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      12-01-2009, 07:22 PM   #20
BayMoWe335
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This is good news as I do not plan on modifying my car's tune.
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      12-01-2009, 09:24 PM   #21
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The turbocharger centers should definitely last upward of 100k miles if they are not abused (pushed to the max regularly) and are well maintained.

But as mentioned above, the worse part of these turbos is the wastegate assembly bushing. It wears at a very fast rate, causes rattle, and eventually will affect the wastegate arm's ability to move freely (binding) or seal tightly. This means you can end up with stuck open, shut, slowly reacting wastegate flappers, poorly sealed flapper; which in turn will cause poor boost control or low boost generation (not a good thing). From what I have seen, I believe most of the bushings will reach their service limits by ~60k miles. For most the problem will begin to manifest itself much sooner.

All of this said, IMO, the OP probably isnt too far off with the 60k miles assessment.

Oh and yes the wastegate assembly has been revised, but it hasnt been until much more recently. I've seen turbos produced Feb. 08 which still are the old wastegate assembly design (thats at least 1.5 years of production with old design).

Rob
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      12-01-2009, 09:38 PM   #22
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Yes the turbos on the 335i are mitusbishi's i think TD-03's.. But I'm not buying the 60k lifespan, you'd really have to dog the car and not maintain it very well for this to happen.. I owned a Neon SRT-4 (Mitsubishi TD-04) for almost 7 years and drove it hard for about 100k miles and the turbo was still perfectly fine
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