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Old 02-10-2015, 10:20 AM   #1
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E46 320d hard to start

Hey guys.
New to this forum just needed a few answers.
I have a 2003 E46 320d.

The car has been hard to start lately.
I thought the battery was flat so I replaced it a few weeks back.
Started ok, but then the same thing started happening again.
It's especially hard to start after the car has been driven, but will always start on jump leads.
It can't be the battery because it is a brand new one.
Is it possible the alternator could be stripping power from the battery?
Or something simpler such as a blocked fuel filter?
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Old 02-10-2015, 12:07 PM   #2
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A bad alternator can be the source of a TON of problems! But if I were you, I'd get a new alternator and fuel filter, slap them in and see if that helps. They're both relatively easy to DIY and you can find a bunch of instructions on here. It's also good preventative maintenance (which helps a lot with and E46). Other than that I'm not too sure. any codes or lights on the dash?
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Old 02-10-2015, 02:22 PM   #3
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If it doesn't crank, or crank slowly, low voltage is the first suspect.
Read section 1 in my No start thread.

GM No Reverse - posts 427, 439

"Would the codes indicate if it's the carburator?"
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Old 02-10-2015, 05:19 PM   #4
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E46 320d hard to start

The voltage might be enough but the cranking amps of the new battery might be too low. I had this problem with a diesel powered dozer, I put the brand new battery out of my truck in it and it wouldn't crank fast enough so I bought a optima yellow too and it fires up easy. Also make sure your battery connections are tight and don't have any corrosion. But like iszlszx says check your voltage too. Usually if there's a alternator problem your battery light will come on.

Last edited by Willie00328I; 02-10-2015 at 05:22 PM.
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Old 03-18-2015, 04:30 PM   #5
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My Ride: 2003 BMW 320d E46
Thanks for all the help guys.
To be totally honest with you I haven't got trying anything yet.
The night I posted this thread, I hit a pole with the car.
Long story short, have it fixed, got a few wee fancy bits for it but haven't fixed the hard to start problem.
So, I got another question for you guys.
I bought an msport rear bumper for it.
As far as I know, its off a pre facelift.
I was told it would fit but it seems there in a difference in the clips and maybe the parking sensors. Any clues?
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320d, diesel, engine, hard to start

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