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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 08-09-2014, 11:21 AM   #1
Hockeyguy02
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Belt, Pulley, Tensioner replacement e46 m3

Hey guys, so I currently own a 01 m3. I brought my car in for a service and they wanted 900$ to do all of the belts, pulleys, and tensioners. Now i have read any basic mechanic can do this so I intend on tackling this with a friend. My question being. Where is the best place to buy all the parts. ECS has a full package that they put together for 199$ vs the factory kit for 500$. Do I really need to replace all the bolts and washers or might as well since I am already replacing the belts? Is there a cheaper place to buy these kits? It would be ideal if I didn't have to ship and it take a while to get here. Any local shops carry these parts?
Would any of you recommend under driving the pulleys? I have read mix opinions.

Thanks guys.
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Old 08-10-2014, 01:03 PM   #2
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noone wants to chime in? Im looking to pull the trigger on a set pretty quick!
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Old 08-10-2014, 01:52 PM   #3
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You don't NEED to replace all the bolts/washers, but you might as well. They cost very little and unless you only want to replace the belts, the cost of that package is probably less than buying all the pulleys and belts individually.

Under driving will gain you some performance by sacrificing your accessories. Not something I would do, but some people aren't concerned about their voltage, a/c, etc.

ECS is good to deal with, usually among the best priced and reliable. I'd recommend buying from them.
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Old 08-10-2014, 03:10 PM   #4
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Originally Posted by Teslazerok View Post
You don't NEED to replace all the bolts/washers, but you might as well. They cost very little and unless you only want to replace the belts, the cost of that package is probably less than buying all the pulleys and belts individually.

Under driving will gain you some performance by sacrificing your accessories. Not something I would do, but some people aren't concerned about their voltage, a/c, etc.

ECS is good to deal with, usually among the best priced and reliable. I'd recommend buying from them.
Thanks for the reply! Nice to see Youre from the great white north as well. As far as ECS products vs genuine BMW products whats your take. There are two kits and the ECS belts and pulleys and tensioners are about 290$ cheaper. What if I went with the Rogue Engineering Under drive belts and used the 199$ ECS package for the rest? Or stay away from anything other than BMW original parts. Cheers,
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Old 08-11-2014, 12:08 AM   #5
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Thanks for the reply! Nice to see Youre from the great white north as well. As far as ECS products vs genuine BMW products whats your take. There are two kits and the ECS belts and pulleys and tensioners are about 290$ cheaper. What if I went with the Rogue Engineering Under drive belts and used the 199$ ECS package for the rest? Or stay away from anything other than BMW original parts. Cheers,
"Genuine BMW" is usually a joke. Next to none of it is manufactured by BMW, they just badge it and sell it for higher profit margins. That said, the cheapest parts aren't always good quality. I don't think this kit is one you should be concerned about the quality though.

If you're doing under drive pulleys, they may change the belt length, so that ECS kit might not work with them.
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Old 08-11-2014, 03:47 PM   #6
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Hi,

You don't need to replace all the bolts and washers unless they are physically damaged.

We do carry the parts that you need for the 01 M3.

Here is the link to our site:
AutohausAZ- Belt drive system

Disclaimer: Make sure to check the year and model of the vehicle before placing the order.
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