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 The E90 - N52 over N43 ?

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TSLORD SK
post Jul 20 2022, 06:43 PM, updated 4y ago

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Hi guys, two years ago i wanted to get the e36 as my first beemer. After consideration i changed my mind to the E46.

Since those are very old models, i have saved up to get a E90 (petrol) LCI, in the range of 30k ++ and and additional 10k for surprises. My research is telling me that for an e90, i should skip the 318i and 320i due to the notorious N43.

Instead i should go for the 323i or 325i, which run the N52.

I cant go beyond those model, those are my target models as a beginner ( this is my limitation)

My question is: am i right in going for the N52, leave alone the power and being straight 6. My curiosity is, am i right in ignoring the N43 ?


My other problem, the E92 has been driving me nuts, in fact that is the reason i am still holding my purchase. Engine wise its going to be same as the 90, the extra dough is for the look it has biggrin.gif

Those who have knowledge about the N43 and N52, please shed some light. I have a japanese make for running around. The beemer is not meant as a daily drive. Thanks



For those who wish to advise that i should not consider a beemer, pls stick to the thread. I have had such advises, turns out that one of them attempted to get a beemer but never managed to. The other guy, worked opposite a BMW service centre, and he says that he sees a lot of beemers coming in !

This post has been edited by LORD SK: Jul 20 2022, 07:25 PM
TSLORD SK
post Jul 21 2022, 12:50 AM

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QUOTE(OrangeGrove @ Jul 20 2022, 10:37 PM)
N52 was BMW global most used engine during the E90 era. It was very popular in the US and Europe. It was more heavily developed, a lot of references around the world. Straight 6 has been their trade for this generation of NA engines.

N43 was for certain market like us to introduce entry level model.

I was once wanted to get an E90 too, and done some research, even asking the local bimmer users. Almost all of the references that I got is to get the N52 over the N43.

There are 2 variant of N52, silver and black top.. you can do some research..
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Thats good to hear. Yeah i have heard about the black and silver top, i wonder which was assigned to asian countries, i shall check on that. Thanks.
TSLORD SK
post Jul 21 2022, 12:54 AM

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QUOTE(blindmutedeaf @ Jul 20 2022, 11:04 PM)
to drive a bmw.... you need to drive like you are stealing it... keeping it at home... it will cause more problems
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Any old car will suffer if left untouched at home. Also no matter what car one drives, one has to blast and push it to its limit once in a while so that the engine does not become manja and suffer performance. I use to do it since my teen era.
TSLORD SK
post Jul 21 2022, 01:02 AM

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QUOTE(OrangeGrove @ Jul 20 2022, 10:37 PM)
N52 was BMW global most used engine during the E90 era. It was very popular in the US and Europe. It was more heavily developed, a lot of references around the world. Straight 6 has been their trade for this generation of NA engines.

N43 was for certain market like us to introduce entry level model.

I was once wanted to get an E90 too, and done some research, even asking the local bimmer users. Almost all of the references that I got is to get the N52 over the N43.

There are 2 variant of N52, silver and black top.. you can do some research..
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Were the reference to N52 made because they are straight 6s or because the N43 were problematic ?
TSLORD SK
post Jul 22 2022, 01:38 PM

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QUOTE(ctw88 @ Jul 21 2022, 05:49 PM)
I think you meant N46. N43 is direct injected, and just like N53 wasnt officially brought in to our market due to high sulphur in our fuel back in the late 2000's to 2010

Regarding silver or black top, the valve cover is different where the silver has magnesium valve cover, where the black ones has plastic valve cover.

Silver one has an external PCV valve where the black one has PCV valve built into the valve cover itself, so if the built-in one is busted, you have to change the whole valve cover which costs around 1.6k for original

Black top N52's no longer has the lifter ticking noise, while the silver top still has a chance of it occuring. So both have its own pros and cons.

Anyway, just skip the N4x series. They're known to burn engine oil at crazy rate
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If i am not mistaken, N46 was ther earlier versions of the E90, it was replaced by N43. What i am not sure is, which was the exact models which were sold in Malaysia for 320i and 318i. If you know, pls let me know.

Yeah i did come across the sulfur thingy, but didnt read much on it.

Real good info on the black and silver tops. Appreciate the input. Will read about it.

So the N4x series are cumbersome. Thank you for the confirmation on this.

TSLORD SK
post Jul 22 2022, 01:40 PM

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QUOTE(OrangeGrove @ Jul 21 2022, 07:17 PM)
Because N52 is made for global market. More development being done.

The 2L is made for those "low income countries" to capture these market, like Malaysia.

The moment my close friend's E90 320i went for engine overhaul, I step away from it .. it also makan engine oil..
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Another confirmation that 2L and below in the E90 series should be avoided. Thanks man.
TSLORD SK
post Jul 22 2022, 01:49 PM

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QUOTE(littlefire @ Jul 22 2022, 09:02 AM)
No, just skip the petrol engine model and go for diesel. My father owns the e90 320d and until today engine issues is quite minimal compare to petrol engine equivalent. As my mechanic place also got few 320i with different generation engine, petrol also got a lot of problems from valvematic controller, ignition coil, sensor, electric water pump etc...

My mechanic personally feedback if want less issue and can accept the clutter sound of the high pressure fuel pump & injectors the diesel engine is way more reliable and less electrical part to worry about..

Besides that also higher torque fun..  brows.gif
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Thanks for confirming the issues of 2L and below. Yes i read about all those problems with all the parts that you mentioned 😅. Those who bought would be cursing endlessly !

I do have an issue with the diesel engine sound, that is the reason why i am not considering the diesel version.

But what you say is true, the diesel version does seem to be a choice if many.

Btw, would uou know anything about the 323i or 325i ? Are these better then the 320i ? Thanks.
TSLORD SK
post Jul 25 2022, 03:45 PM

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QUOTE(ctw88 @ Jul 22 2022, 02:41 PM)
Malaysian market E90 lowest spec is 320i, if you see 318i E90 its likely imported unit from either UK or JP.

Personally I'm driving an e60 with black N52. So far so good, its doesnt give much problem. Just remember the maintenance of 6 cylinder engines are more expensive. You need more engine oil, spark plugs and ignition coils than regular 4 cylinders laugh.gif

Also you cannot cheap out on engine oil on these. The vanos system in these are very sensitive to oil quality

Another thing to note is whether the E90 has ZF or GM gearbox. ZF seems to be better
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Wow, i didnt know about 318i being only imported. Good info.

Ahh you have the E60 ! 3.0 ? Actually a friend of mine has too, he told me that there was not much hassle from the car. He bougjt it from a used car, i didnt believe him, but he then explained that the bought 3.0, which less problems compared to the lower specs.

Yes i was told not to be stingy when it comes to the service. I estimate around 700-800rm for a normal service with engine oil, filter and plugs, would that be right ?

Yes the Gm and Zf, at this point i am not sure, which model useS which. That is another thing to research.

Really appreciate your input. Thanks.

TSLORD SK
post Jul 25 2022, 03:47 PM

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QUOTE(littlefire @ Jul 22 2022, 03:59 PM)
For sure 323i/325i is more better compare to 320i from engine layout (4 cylinder vs 6 cylinder) to output.
If really want to drive petrol engine from BMW, the 6 cylinder engine is one of the best.
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Ok, i get it. But when it comes to engine issues, are the 323i and 325i as bad as the 320i ?
TSLORD SK
post Jul 25 2022, 03:50 PM

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QUOTE(OrangeGrove @ Jul 22 2022, 02:01 PM)
I am guessing N52 parts are more common than diesel one ..

Anyway the reason to choose diesel if you treat it as your daily work horse. But if the intention is to have a fun weekend car, straight 6 will be more fun with it's high revving engine..
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I am not looking to use it as a daily. Its just for weekends and random rides on week days !

TSLORD SK
post Jul 25 2022, 06:30 PM

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QUOTE(littlefire @ Jul 25 2022, 04:50 PM)
Similar problems across petrol engine as most items are quite similar, some older engine might be using mechanical water pump so cheaper a bit to change, but the rest should be similar. For 6 cylinder engine, the engine mounting might last longer due to less vibration.
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Wow thats sad to hear. if the N52 has same issues then have to think twice 😂
TSLORD SK
post Jul 25 2022, 06:36 PM

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QUOTE(779364 @ Jul 25 2022, 04:55 PM)
few things to look at for

Active steering fault - the sensor board itself kaput or the steering rack
Idrive electrical gremlin - if faulty probably the HU unit needs replacing. Need reprogramming
N52 HPFP - notorious for failing
N52 electronic water pump - Will definitely fail within 5-10 yrs old
Suspension bottoming out - worn shocks/struts
6speed ZF guibo flex disc and driveshaft - If flex disc fail, will get vibration at certain speed
ABS pump failure - this are expensive new. Consider refurbished units

All in all, RM10k only enough to replace broken parts, not include wear and tear item yet. Prepare at least RM25k to be save
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Good advice. Thanks.

I did tske note of all the common parts that needs to be replaced with a certain mileage- water pump. Valve cover, thermostat.

The idrive, steering rack and drive shaft, i did not anticipate. Maybe these are for cars that were not taken care at all. I hope 😨
TSLORD SK
post Jul 25 2022, 11:48 PM

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QUOTE(ctw88 @ Jul 25 2022, 06:56 PM)
N52 has no HPFP. N53 has it, but N53's are not officially brought in by BMW, only UK grey imports have a chance to carry N53 from 2007 onwards

Other things that likely to go wrong with the N52 is the VANOS solenoid. Once your engine idles roughly, and throw the cam position stuck error, its time to change. 400+ a piece, and there's 2 of it

My valvetronic motor also went out of position once, but that was probably because I forgot to re-adapt after changing the valve cover laugh.gif

Other than that, my water pump still works and no active steering issues

Output shaft is starting to give some faint clunking though
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Thats a relief to know that the high pressure fuel worry is of the N52.
Yes i have read about the solenoids.

Do all of the N52 come with vanos or are there any which come without it ? I mean like for honda, there are non vtec models.
TSLORD SK
post Jul 26 2022, 09:54 AM

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QUOTE(littlefire @ Jul 26 2022, 09:27 AM)
All N52 engine got vanos, if you dont want vanos will need to get back those old rides from 90's which is the E34 early batch M50 (non-TU) engine.
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Oh ic. Thank you for the explanation.
TSLORD SK
post Jul 26 2022, 02:03 PM

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QUOTE(timmychin @ Jul 26 2022, 12:04 PM)
Go for it! I've been contemplating for years on the E90, finally bit the bullet on the 320D few months ago since I need it for daily driving. Great car, great fuel consumption, and torque is amazing!
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Good to hear. I am looking at the petrol engine though !
TSLORD SK
post Jul 28 2022, 12:08 PM

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QUOTE(Zenith5229 @ Jul 28 2022, 10:01 AM)
I have a F10 with the N52B30 258hp version .

Basically oil leaks at the usual spot - Valve cover gasket , Oil filter housing gasket and oil pan gasket . The upper two are more important to be sorted out immediately because it drips downwards on the serpentine belts and can also drip down to the exhaust side causing weird fumes .

Bad location of DME causing premature wear from heat probably , my MSV90  DME died and it was such a hassle .

Kena ignition coil as well causing misfires , but this is probably wear and tear .

Definitely go for the inline 6 . It's so smooth and creamy and the driving experience is just not the same .
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Wow 258 horses ! Yes i did read that F series did use the N52 as well. Thanks for the confirmation.

The top three: valve cover gasket, oil filter housing gasket, oil pan gasket, ha ha totally checks out with the reviews that i have read.

And yes i came across the issue of the leaks flowing down to the serpentine belts and wrecking up the engine. Oh dear, things an oil leak can do the engine 😅 !!

The ignition coil, is it the same as the solenoid ?

One other info would greatly help:
Yours being a F10, the repairs must have been recent, i am just wondering how much was the damage to your wallet for the replacement of the three leaks issues ? 6k++ ?

Thanks.

TSLORD SK
post Jul 28 2022, 01:40 PM

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QUOTE(Zenith5229 @ Jul 28 2022, 01:18 PM)
1- Just for the three leaks i think its not even close to 6k , the gaskets itself are like 100-300 per pcs , valve cover i think its like 700 - 1k , the rest are workmanship charges which depends on model and depends on workshop . Just figures off the top of my head , it may not be exactly accurate ya .

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Ok. I get it, its a rough estimate.


QUOTE(Zenith5229 @ Jul 28 2022, 01:18 PM)
And for the valve cover gasket theres two ways of fixing it , u can change the whole valve cover , or just the gasket only ( not recommended , i forgot the exact reason , sorry )

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Alright, not to cut cost on this. Better to change as a whole. Good advice. Its fine i check out the cons and pros.


QUOTE(Zenith5229 @ Jul 28 2022, 01:18 PM)

2- Yup , oil leakages should be fixed asap , the leak itself it not a big issue but it will indirectly cause collateral damage to other parts if left long enough .

3- No , ignition coil is the the thing connecting to the spark plug . The vanos solenoids are another thing altogether
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Ok leaks can lead to massive issues if ignored. Noted.

Oh, its a diffetent part, i m still a noob.

Thanks for the explanation. Appreciate the info. I assume that had yours done from an external mechanic, i mean it was not done at an official service centre ?

Official service centres are not all that great for certain repairs i guess.

This post has been edited by LORD SK: Jul 28 2022, 01:42 PM
TSLORD SK
post Jul 28 2022, 01:55 PM

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QUOTE(779364 @ Jul 25 2022, 04:55 PM)


All in all, RM10k only enough to replace broken parts, not include wear and tear item yet. Prepare at least RM25k to be save
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Gathering further info. Can i ask which wear and tear cost you up to 15k. Excluding the tyres 😄, they can be pricey according to taste !
TSLORD SK
post Jul 28 2022, 08:01 PM

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QUOTE(Zenith5229 @ Jul 28 2022, 01:55 PM)
Yeah , i do my repairs with independent workshops , the official service centers are overpriced .  whistling.gif  whistling.gif

To go back on your topic right , i think your budget and emergency fund for repairs is just nice to get a inline 6 LCI E90 . The e92 commands a much higher price , maybe due to its rarity .

If you go with the E92 i think you can only shoot for the E92 320i  , so its becomes a debate of E90 323i/325i LCI vs E92 320i  biggrin.gif
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I see, service centers are not a good choice. Noted.

Haha you are right dude, i can go with an E90 325 Lci with the funds i have. It very very very tempting and to hold tje money 😂😂


True E92 330i is already at the 50k and below mark. 325i is 55 above 😄. As much as i want the E92, i would never go for the 320i, knowing how problematic the engine can be.

The situation now is either i come actoss a well maintained E90 325i Lci, or i am thinking of accumulating a little bit more of cash for the E92 325i. It wont be LCI either and no i~drive !

Ha ha. I am so happy someone understands my dilemma and the debate i am having within my self. 😁😁😁
TSLORD SK
post Jul 28 2022, 08:07 PM

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QUOTE(Yapmy @ Jul 28 2022, 02:04 PM)
I used to own an E90 325i LCI and I can attest that the engine is quite reliable. The only issue I faced was random oil leaks from worn gaskets i.e. oil cooler, oil pan, valvetronic and etc. Power is decent but the high revving sound is the best part of engine. The engine does consume some engine oil depending on your driving style and quality of oil used where interval top ups (maximum 1 litre) may be required.

Do also take note the petrol consumption is quite high where I used to average around 12.6L / 100KM for urban driving.

Picture of my car before i sold it. Gosh i miss this car.

user posted image
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You had a beauty man. No wonder you miss her. !!

Thanks for tip on the engine oil consumption, will take note of it. Also its nice to personally hear the experience of an ex-owner who still misses the car.

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