E46 320d...things to watch for?
E46 320d...things to watch for?
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GT03ROB

Original Poster:

14,002 posts

246 months

Tuesday 11th May 2010
quotequote all
I'm looking at buying a 320d in the next month or so. Budget around £8-9k. I'll be doing pretty high motorway mileage, around 20k pa.

Anything to watch/check for when buying these? Common problems/issues??

Lefty 200 Drams

20,205 posts

227 months

Tuesday 11th May 2010
quotequote all
People sitting 2 feet in front of you on the outside lane of dual carriageways?




wink

GT03ROB

Original Poster:

14,002 posts

246 months

Tuesday 11th May 2010
quotequote all
Lefty 200 Drams said:
People sitting 2 feet in front of you on the outside lane of dual carriageways?

wink
LOL smile funny they do that when I'm in the Range Rover too, so I'm quite used to it.....laugh

Lefty 200 Drams

20,205 posts

227 months

Tuesday 11th May 2010
quotequote all
hehe:


Seriously, a friend of mine had one for a year and loved it. Surprisingly capable and he struggled to get it below 40mpg, even driving like a coq.

rfn

4,601 posts

232 months

Tuesday 11th May 2010
quotequote all
Common problems: Turbo failure / Injector issues

It's a big one I know, but there are plenty of 320d's out there with 100+ on that haven't had a problem. I looked at five or six a couple of years back and 3 had had turbo failure. The one I bought in the end, had turbo failure on the way home from the garage on collection day, 65k miles!

I bought a Mondeo STD in the end - and that had a whole host of problems too wink

ETA: Think they resolved the Turbo issues in 2003 - or so I heard

Edited by rfn on Tuesday 11th May 09:32

Sticks.

9,632 posts

276 months

Tuesday 11th May 2010
quotequote all
Others know more about this but do a search for swirl flaps, for eg http://www.pmwltd.co.uk/swirl_flaps.pdf

GT03ROB

Original Poster:

14,002 posts

246 months

Tuesday 11th May 2010
quotequote all
Sticks. said:
Others know more about this but do a search for swirl flaps, for eg http://www.pmwltd.co.uk/swirl_flaps.pdf
That not look good...

Shropshiremike

24,247 posts

228 months

Tuesday 11th May 2010
quotequote all
Turbo failures are more comon upto EU4 where they changed to electronic turbo, but the turbo's dont fail as often as people think. When its in for service get them to remove the turbo air intake pipe and check the free play in the turbo impeler spiddle(just lift up and down with fingers) there should be about 1mm lateral play and about 0.5mm axial play (pull and push spindle).
They may find some oil sat in front of the spindle and in the pipe...this is a sign that the crank case breather filter on top of the engine requires relacment(interval for these is 60k)

Depending on the scale of a turbo failure the normal costs result in a turbo,intercooler,inlet manifold,cat and exhaust system.....on very very rare occasions and this is extremly rare the engine fails, this is because huge amounts of oil go into the inlet track and into the engine...the oil ignites and the engine revs to destruction.....once this process starts it cant be stopped ignition on or off.

If a swirl flap fails it almost always ends up being an engine replacement. Heavy damage to piston,head and bore.

There are 2 options here and that is to fit the later modified manifold which is a direct replacement or to remove the swirl flaps from the manifold all together. The new manifold has thicker spiddles holding the butterflys in.

Check the metal brake pipes at the rear for corrosion and treat them before they become an mot fail(follow the metal pipe from the flexi hose up towards the fuel tank)
Check rear trailing arm bushes
Check handbrake shoes
Check front wishbone joints and bushes
Check the turbo actuator vacuum pipe that runs from turbo to valve to accumulator then up over the engine and under the manifold(under engine cover)they perish and collapse...big cause of loss of power in the upper rev range.


Edited by Shropshiremike on Tuesday 11th May 14:22

LTnick

13 posts

200 months

Tuesday 11th May 2010
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So from what your saying, am i right in thinking that from 2004 the turbo and flaps are not a problem?

Nick.

Patrick Bateman

13,036 posts

199 months

Friday 10th September 2010
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Just to reinforce the swirl flap issue...

Mate at BMW has just seen 2 cars come in that has had them go, 730d (116k miles) and a 320d (86k miles). 320d seems to have been lucky and hasn't appeared to have been damaged so it's getting away with a new manifold and gasket etc. The 7 however has had 2 pistons fked among other things and the bill will be well into the wrong side of £2000.

God it's good having that peace of mind.

mbrain

4,550 posts

193 months

Friday 10th September 2010
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The passenger occupancy sensor mat can become troublesome at over 5 years old.

You'll see the red airbag light come on the dash (intermittently at first). The idea is that the passenger airbag wont go off if there isn't a passenger in the seat. I fixed mine with an OEM loop plug, but to replace the mat you'll looking at £250 all in.

Turn the ignition on without a passenger and see if the light comes on.



Patrick Bateman

13,036 posts

199 months

Friday 10th September 2010
quotequote all
mbrain said:
The passenger occupancy sensor mat can become troublesome at over 5 years old.

You'll see the red airbag light come on the dash (intermittently at first). The idea is that the passenger airbag wont go off if there isn't a passenger in the seat. I fixed mine with an OEM loop plug, but to replace the mat you'll looking at £250 all in.

Turn the ignition on without a passenger and see if the light comes on.


Ah so it's just the passenger airbag that won't go off?

I currently have the light on although I heard somewhere that no airbags would deploy, which did seem a bit odd.

Ranger 6

7,597 posts

274 months

Friday 10th September 2010
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mbrain said:
....I fixed mine with an OEM loop plug....
What's one of those then?

BlueProp

4,550 posts

193 months

Friday 10th September 2010
quotequote all
Ranger 6 said:
mbrain said:
....I fixed mine with an OEM loop plug....
What's one of those then?
It's an BMW Original Equipment plug that has a resistor, etc inside that replicates the passenger occupancy sensor so fooling the car that the mat is ok and doesn't require replacing. This plugged into the wiring loom at the back of the front seat instead of the sensor plug.

The only 'downside' is that the airbag will always deploy in an accident - whether or not someone is sat in the seat.

Ranger 6

7,597 posts

274 months

Friday 10th September 2010
quotequote all
Thanks smile