[betaruce]

this is a common issue and i have read some post here

any recommendation of when should one do a prophylactic change?
my car is a 2006 335i with only 35k km true mileage

but my main ques is
are the new thermostat and water pump really improved compared to the old ones? if yes, what is modified to make it less easy to fail?

afterall if it is just the same, then theres no point of a prophylactic change?

thanks

[Frenk]

Originally Posted by betaruce

are the new thermostat and water pump really improved compared to the old ones?

yes, they are not made of the same material .. others will give you more détails ...

[3s4u2]

My original water pump is just now showing signs of T-Stat failure and my 06 325i has over 220000. miles on her.

[Bimmertech113]

They are both very different. Some aren't even made by the same manufacturer. If anyone in the middle tennesse area wants it don't cheaper than a dealer or Indy. I can help you out.

[betaruce]

Originally Posted by 3s4u2

My original water pump is just now showing signs of T-Stat failure and my 06 325i has over 220000. miles on her.

may i ask what are the signs that u experience? thanka

[VTECaddict]

It's pretty expensive to change prophylactically. They tend to fail around 100k miles. Mine went at about 80k miles. With such low mileage, yours might still last for a long time.

[MetsFan]

I can't say if it's any better or not, but my water pump failed at around 60K miles and I had to have it replaced.

[Sandman614]

OP I assume you have no warranties currently on the car?

[betaruce]

Originally Posted by Sandman614

OP I assume you have no warranties currently on the car?

no it is not under warranty

[3s4u2]

Originally Posted by betaruce

may i ask what are the signs that u experience? thanka

I am now experiencing a 2EF4 code thermostat map not reading correctly or stuck open, I can reset it, but it comes back after a week or two. According to many forums this is the first sign of water pump failure and from what I have read it seems to be fairly accurate.

There is a safeguard that was built into these thermostats that fails open if there is an issue and your car run cool all the time and less efficient.

Hope this helps!

[betaruce]

Originally Posted by 3s4u2

I am now experiencing a 2EF4 code thermostat map not reading correctly or stuck open, I can reset it, but it comes back after a week or two. According to many forums this is the first sign of water pump failure and from what I have read it seems to be fairly accurate.

There is a safeguard that was built into these thermostats that fails open if there is an issue and your car run cool all the time and less efficient.

Hope this helps!

thanks a lot
just did a search, looks like b4 the pump fail, there will be a code 2e81 for a while before it fail one day
and the code 2ef4 is for thermostat which is usually asso with the SES light on

[betaruce]

in case anyone wants to know, heres a detailed thread
http://www.e90post.com/forums/showthread.php?t=561183

the problem appears to be the electronic part of the pump which deteriorate over time due to heat
but i still cannot find a post that specifically describe what is improved in the new part
hope someone can give me some insight on that

also. may i know is this problem also in other bmw models with n52 n54 engines?

thanks

[oshusttoley]

Mine went at 40k. No signs. Just stranded me on the highway.

[Andrewah05]

When warning signs occur, death is certain, no time to CPR, by this I mean, the temp light goes orange to red, BMWs jet engine fan that they put into the N54 starts up and the car goes into limp mode, mine wouldn't even move failed at around 125km or 77k miles

[mlifxs]

Originally Posted by 3s4u2

I am now experiencing a 2EF4 code thermostat map not reading correctly or stuck open, I can reset it, but it comes back after a week or two. According to many forums this is the first sign of water pump failure and from what I have read it seems to be fairly accurate.

There is a safeguard that was built into these thermostats that fails open if there is an issue and your car run cool all the time and less efficient.

Hope this helps!

I got my first 2EF4 yesterday. Car has 129k. Still on orig wp.

I searched the forum on this, it's not clear to me that this indicates near term failure for the wp, though I'll be checking codes for it more often than previously.

[GoRomeo]

Originally Posted by 3s4u2

I am now experiencing a 2EF4 code thermostat map not reading correctly or stuck open, I can reset it, but it comes back after a week or two. According to many forums this is the first sign of water pump failure and from what I have read it seems to be fairly accurate.

There is a safeguard that was built into these thermostats that fails open if there is an issue and your car run cool all the time and less efficient.

Hope this helps!

Me too, I have had this issue for 2 yrs now. I believe my code was P0128 I also reset it with BT tool and never came back on. I am at 115k miles.

[#Tee]

omgah he said prophylactic change...i have no idea what that means but i want

[e92_enthusiast_1]

I had never heard that term used in automotive context like that but I like it.

Originally Posted by #Tee

omgah he said prophylactic change...i have no idea what that means but i want

[Sandman614]

Originally Posted by #Tee

omgah he said prophylactic change...i have no idea what that means but i want

strong User Title to post content ratio

[mlifxs]

Originally Posted by GoRomeo

Me too, I have had this issue for 2 yrs now. I believe my code was P0128 I also reset it with BT tool and never came back on. I am at 115k miles.

...and no water pump fail I take it?

[betaruce]

Originally Posted by 3s4u2

I am now experiencing a 2EF4 code thermostat map not reading correctly or stuck open, I can reset it, but it comes back after a week or two. According to many forums this is the first sign of water pump failure and from what I have read it seems to be fairly accurate.

There is a safeguard that was built into these thermostats that fails open if there is an issue and your car run cool all the time and less efficient.

Hope this helps!

3s4u2
do u have the ses light on?
may i ask from your reading, 2ef4 means the thermostat already fail or pending to fail?
it would be great if you can share some of the useful post that u read
thanks

[3s4u2]

Originally Posted by betaruce

3s4u2
do u have the ses light on?
may i ask from your reading, 2ef4 means the thermostat already fail or pending to fail?
it would be great if you can share some of the useful post that u read
thanks

No SES light!

It just mean it didn't map (stat location time frame -v- resistive value) correctly.