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11-20-2014, 04:08 AM | #244 | |
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I Always buy OE
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I'm sure there have been folks who can get away with it and had good luck with non stamped parts...but for me, never again. I am to sensitive to the performance difference to tolerate anything less. |
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11-23-2014, 01:59 AM | #245 | |
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11-23-2014, 10:07 AM | #246 | |
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11-23-2014, 11:09 AM | #247 | |
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11-25-2014, 02:50 PM | #248 |
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The question is whether the TRW parts with the M logo clearly ground off, have any different functional materials/processes than the TRW parts with the M logo not ground off.
Some of us think not, others are suspicious. There's no way anyone is going to prove it, either way. |
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11-25-2014, 04:46 PM | #249 | |
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11-25-2014, 06:42 PM | #250 |
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Does anybody want to donate a FULL set of original M parts and a set of TRW parts?
I can do a whole slew of tests to determine material properties and will let you know if there is a difference |
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11-25-2014, 09:32 PM | #251 |
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Funny...I'll repost this here....
This is one of the arms that is physically on my personal car. I now have about 15K miles on these and will be going on two years pretty soon. List of mods are in my sig. I can also say without a doubt this is common. We sell fuel system upgrades and we have bought a lot of BMW LPFP assemblies. We used to order them in two different ways. OE and OEM...but after a while of ordering OE and finding it to be a complete waste of money, we stopped. Given we no longer sell complete Stage 1 kits with an OE pump, there was no reason to continue paying the extra fee for something that was going to get disassembled and rebuilt anyway. However this is what we saw when we ordered both types. 1. BMW OE replacement. This is a VDO assembly that comes with a part number molded in to the top hat, a sticker, and a little blue stamp on it. Oh and the box had an extra sticker on it with the BMW part number. 2. VDO BMW OEM replacement. This is a VDO assembly that comes with a part molded in to the top hat (but ground off), a sticker, and a little blue stamp on it. The difference in this case is that we have the ability to bench test them (there is no performance difference) and we also completely disassemble them. Again, there is absolutely no difference. The funny thing is that the OEM was cheaper but actually costs them more because they have to go in and grind off the part number. The other funny thing...one time we ordered quite a few pumps and they apparently didn't have enough of the OEM pumps...so they removed the OE pumps from the boxes and sent those as OEM......score! OE pumps for the OEM price that didn't have the numbers etched out. All that said, I'm not trying to talk anybody into or out of anything...just provide factual information based on our experiences.
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11-25-2014, 09:43 PM | #252 |
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Didnt we establish before that TRW sells OE BMW and their own OEM part. The M is ground off because of legal reasons for them to sell a OEM class part.
I dont think they even care which is which - I assume the batch is ordered, they make them all to spec perhaps 20% more than ordered, than they make a % of them OEM by grinding off labels
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In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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11-25-2014, 10:21 PM | #253 |
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Fwiw, my indy refuses to install OEM parts that people bring in because they're tired of being blamed when the cars come back with issues. OE BMW only, to the extent that they're turning away business.
Clearly some OEM is better than others, and sometimes you won't have issues (most the time, even), but if you want to install it and forget it, consistently, OE is the only way to go.
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11-27-2014, 07:08 AM | #254 | |||
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there's a difference between aftermarket OEM and the contracted OEM.. in this case, TRW is the company BMW paid to make the parts.. the right moulds, accurate specs, the right materials to the right grade etc. there are OEM's that can make the same part for the aftermarket though, which may be of lesser quality... which is fair enough IMO, i agree sometimes parts can just be worse, of course. the only reason any mechanic would turn away proper OEM stuff like say this TRW is if they want to push OE for a higher profit margin... FWIW, i'm up to.. uhhh it'd be ~25k miles, and there's not a bad mark on them... will probably be putting them in the GF's' car soon too. and As SteveAZ said, fuel pumps are another perfect example.. so are coils, and probably countless other components on our cars. Last edited by flinchy; 11-27-2014 at 07:14 AM.. |
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11-27-2014, 08:46 AM | #255 | |
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Being by the actual manufacturer guarantees nothing. E.g. There isn't an oem thermostat for the s62 that doesn't run too cool. If you want to run at the proper temp, OE is the only option. Glad the oem lottery worked out for you on this occasion. By no means am I saying that 100% of the time it won't work out-- just that it doesn't work out often enough that it's not worth the extra hassle for the savings, imo. |
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11-27-2014, 09:48 AM | #256 | |
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11-27-2014, 10:59 AM | #257 | |
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11-27-2014, 11:05 AM | #258 |
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Nonsense, pure nonsense. Factory seconds? Where does that come from? The manufacturer didn't say that, they said they were the same. I guess you have seen more than one set of these and had there be a large variation. You have no evidence of anything you are saying.
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11-28-2014, 11:35 AM | #259 | |
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My experience with the automotive industry shows this is a very common practice and not to be equated with part manufacturers who outsource cheap production to China or Asia to make aftermarket parts and increase their margins. |
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11-28-2014, 11:50 AM | #260 | |
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11-28-2014, 11:57 AM | #261 |
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The TRW suspension components I've had look exactly like factory except for the ground off logo.
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11-30-2014, 01:53 AM | #262 | |
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it's not a lottery, it's the exact same part, i don't get what's so complex if you look at the part that you get the car with from BMW, you're guaranteed it's the right one from OEM. just go look at your coils next time if you want confirmation of this. |
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11-30-2014, 05:14 PM | #263 | |
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12-01-2014, 03:18 PM | #264 | |
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Thanks you Iron Man! This is the most logical explanation of why they are cheaper. It should be stickied at the beginning of the thread! |
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