Advice on downpipes

[RZ4M]

I know somebody that might put DP's on there m135i. Just wanted to know if this mod is definitely undetectable by dealer unless BMW actually sees it?

 

[zaleonardz]

It is detectable on so many levels.

Most service technicians will look past this yes, unless you have a motor related claim.

But can be seen/heard by the trained ear, and computer data logging will also tell stories.

However, 9 times out of 10 when your car goes for a service, it actually does not see ISIS, service interval resetting is done on the cluster, simply to safe time, and of course, machines.

Its quite easy for a machine to be tied up for the day doing programming on a customers car, and then another on a weird electrical problem which can steal isis also for a day, and so on, and so on.

But if your car came in with a bearing knock or something daft, then the guys are going to looking and you will void your plan.

 

[RZ4M]

It is detectable on so many levels.

Most service technicians will look past this yes, unless you have a motor related claim.

But can be seen/heard by the trained ear, and computer data logging will also tell stories.

However, 9 times out of 10 when your car goes for a service, it actually does not see ISIS, service interval resetting is done on the cluster, simply to safe time, and of course, machines.

Its quite easy for a machine to be tied up for the day doing programming on a customers car, and then another on a weird electrical problem which can steal isis also for a day, and so on, and so on.

But if your car came in with a bearing knock or something daft, then the guys are going to looking and you will void your plan.

Ah ok i didn't think it would affect the cars computer? But wouldn't they also need a lot of proof that there was a down pipe installed?

 

[zaleonardz]

They have predefined parameters on many things

Exhaust temperature, boot pressure and a ton of other stuff.

These values are recorded, so if one of them is out of the pre-defined, its pretty obvious that there is a bug (or a mod) in the system somewhere

It harldy ever goes to this extreame, but when BMW wants or suspects abuse, to get out of a big reapir bill, they will go to this level.

 

[RowenS]

It is detectable on so many levels.

Most service technicians will look past this yes, unless you have a motor related claim.

But can be seen/heard by the trained ear, and computer data logging will also tell stories.

However, 9 times out of 10 when your car goes for a service, it actually does not see ISIS, service interval resetting is done on the cluster, simply to safe time, and of course, machines.

Its quite easy for a machine to be tied up for the day doing programming on a customers car, and then another on a weird electrical problem which can steal isis also for a day, and so on, and so on.

But if your car came in with a bearing knock or something daft, then the guys are going to looking and you will void your plan.

X2

 

[Riaan335]

It is detectable on so many levels.

Most service technicians will look past this yes, unless you have a motor related claim.

But can be seen/heard by the trained ear, and computer data logging will also tell stories.

However, 9 times out of 10 when your car goes for a service, it actually does not see ISIS, service interval resetting is done on the cluster, simply to safe time, and of course, machines.

Its quite easy for a machine to be tied up for the day doing programming on a customers car, and then another on a weird electrical problem which can steal isis also for a day, and so on, and so on.

But if your car came in with a bearing knock or something daft, then the guys are going to looking and you will void your plan.

Ah ok i didn't think it would affect the cars computer? But wouldn't they also need a lot of proof that there was a down pipe installed?

I'm sure they won't need proof. If they suspect dp or mods, they will void plan.

Bottom line - Don't do mods if you don't want to loose MP.

 

[131GAV]

Besides being picked up on the computer I have "heard" :rollsmile: of an incident where a car went in and they heard it being started (BMW SA Guys) and queried with the SM what the car was in for and if its being done as Motorplan claim as they could hear the difference in the tone.

True Story....

 

[RZ4M]

:thumbdo: and i waned to go to xcede today to get it done they said its not detectable if its always removed before going to bmw.

 

[SP33DYV]

It's detectable, because you will need s/w to remove the engine check light after the cats in the DP has been removed.

 

[RZ4M]

It's detectable, because you will need s/w to remove the engine check light after the cats in the DP has been removed.

Cant you put a cat fooler? or some bypass around the car throwing code

 

[tcal69]

Even if you remove it everytime, without physical proof, if there is something wrong, chances are BMW will still make up some BS:yuck:

You gotta pay to play:nonono:

 

[SP33DYV]

Even if you remove it everytime, without physical proof, if there is something wrong, chances are BMW will still make up some BS:yuck:

You gotta pay to play:nonono:

^ What he said.

 

[RZ4M]

You gotta pay to play:nonono:

True and and i been the non motor plan route with a scooby:nonono: so not willing to lose plan

 

[Rommies]

leave car bone stock if you are worried about motor plan.

Nothing great in life comes without a sacrifice :rollsmile:

 

[tcal69]

Sorry, wasn't trying to stop our forum sponsor any business, just speaking the truth and experience I had and heard...:sorry:

Another way is, get to know your BMW service adviser, explain your mods and see what they say. But even that won't guarantee 100% :fencelook:

 

[Burgy]

If the downpipe is removed before the service and the OEM one is put back in with original gaskets etc it should be fine.

Problem comes in if something happens and the car needs to go to bmw unexpectedly, with the dp in, they'll pick it up.

 

[RZ4M]

If the downpipe is removed before the service and the OEM one is put back in with original gaskets etc it should be fine.

Problem comes in if something happens and the car needs to go to bmw unexpectedly, with the dp in, they'll pick it up.

So basically if always reverted back to stock you should be fine? But others say its not so? I'm just weighing up pros and cons cause it would be cool for guys to get extra power with minimal to no risk of plan with just a lilt effort

 

[St Lunatic]

Hey bud i have been playing with the same idea and the issue is not if you install a DP with software and remove it, the issue is what id something happens to your motor or you are in an accident and cant remove it ? thenj you are screwed.

Put some software on the car 1st before putting DP in, thats what i suggest.

 

[Riaan335]

But software is also detectable and will most definitely void MP.

 

[Executer]

Not all software is detectable. But there are safer options. Promotec can give you a plug and play device with substantial gains thats MP safe.

Drop us a PM for more info.