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m135i overheating
10-02-2017, 07:19 PM
Post: #1
m135i overheating
hey everyone

i have a m135i 2012 65XXXkm

this past week my car overheated and i phoned bmw on call and they took my car to alberante in alberton,went to fetch my car today after saying they couldnt find a problem
and on the way home it overheated again so bmw is on the way to collect my car

so was just wondering if this has happened to anyone else.. and if anyone may know what the problem is?
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10-02-2017, 08:42 PM
Post: #2
RE: m135i overheating
mmmm can I be the first to ask what mods have been done on the car. ?

I hope its minor like a thermostat not opening.

Z4 M Coupe, once U go Coupe you cant go back. Bluebiggrin
2012 125i Coupe
07 A4 Tdi - 125kw+++ added some extra Ponies via software + decat, EGR & DPF delete.
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10-02-2017, 11:42 PM
Post: #3
RE: m135i overheating
Had same issue was intermittent water pump.
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10-02-2017, 11:47 PM (This post was last modified: 10-02-2017 11:48 PM by Taran Rodrigues.)
Post: #4
RE: m135i overheating
(10-02-2017 08:42 PM)MikeR Wrote:  mmmm can I be the first to ask what mods have been done on the car. ?

I hope its minor like a thermostat not opening.

jb4 and exhaust.
i removed everything before it went to bmw

(10-02-2017 11:42 PM)Mpcheshire Wrote:  Had same issue was intermittent water pump.

apparently they checked the water pump and they say it was working fine
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11-02-2017, 12:48 AM
Post: #5
RE: m135i overheating
Get a second opinion, take it to another bmw dealership

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11-02-2017, 08:26 AM
Post: #6
RE: m135i overheating
(10-02-2017 11:47 PM)Taran Rodrigues Wrote:  
(10-02-2017 08:42 PM)MikeR Wrote:  mmmm can I be the first to ask what mods have been done on the car. ?

I hope its minor like a thermostat not opening.

jb4 and exhaust.
i removed everything before it went to bmw

what I mean is any mods can add fuel to the fire by adding the extra stress to the motor, that could be the underlying problem.

as precaution get them to swap out the thermostat - they will pick up if the water pump is faulty when doing so.

if its only intermittent its a warning to get it sorted now.

Z4 M Coupe, once U go Coupe you cant go back. Bluebiggrin
2012 125i Coupe
07 A4 Tdi - 125kw+++ added some extra Ponies via software + decat, EGR & DPF delete.
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11-02-2017, 08:33 AM
Post: #7
RE: m135i overheating
this sounds like the waterpump to me. Had same issue on my 330i, on my way home to pretoria one day coming back from a friend in krugersdorp my car suddenly made a noise, looked at my navigation screen and there was this slow down car overheating thing. Pulled of the road, trying to slow down my heart for second so I could think clearly and tried starting it up again, car started right up no problem. 4 months later same thing happened, same road also. And then more frequent to every week and eventually the car's fan will go ballistic on startup like I was a boeing getting ready for lift off .....

Talking about it, did you hear the electric fan go boeing fast when this happened? This is a tell tale sign that the waterpump is on its way out

Current: 2005 E90 330i manual - Black Sapphire Metallic (475)

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11-02-2017, 09:14 AM (This post was last modified: 11-02-2017 09:17 AM by Taran Rodrigues.)
Post: #8
RE: m135i overheating
(11-02-2017 12:48 AM)Iceman12596 Wrote:  Get a second opinion, take it to another bmw dealership

well if they cant find anything again then i will

(11-02-2017 08:26 AM)MikeR Wrote:  
(10-02-2017 11:47 PM)Taran Rodrigues Wrote:  
(10-02-2017 08:42 PM)MikeR Wrote:  mmmm can I be the first to ask what mods have been done on the car. ?

I hope its minor like a thermostat not opening.

jb4 and exhaust.
i removed everything before it went to bmw

what I mean is any mods can add fuel to the fire by adding the extra stress to the motor, that could be the underlying problem.

as precaution get them to swap out the thermostat - they will pick up if the water pump is faulty when doing so.

if its only intermittent its a warning to get it sorted now.

yup i can understand that maybe the mods cause cause the problem, but doesnt help if they cant find anything wrong with the car

thanks okay will ask them to check the thermostat, and check the water pump
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11-02-2017, 10:36 AM
Post: #9
RE: m135i overheating
Which warning comes up? Surely that should help them?

My 335i was running hot in traffic, basically the radiator fan was on constantly.. Car had a software update and Ll was good. The late F20 'overheated' as it had a sensor issue..

Good luck getting it sorted.

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[-] The following 1 user says Thank You to cOlDFuSiOn for this post:
projectmushroom (02-11-2017)
11-02-2017, 11:25 AM
Post: #10
RE: m135i overheating
Mine was the water pump


(29-11-2012 12:49 PM)bybyM3 Wrote:  Put a jb in it, and u will feel like u driving a f1 car
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11-02-2017, 11:53 AM
Post: #11
RE: m135i overheating
(11-02-2017 10:36 AM)cOlDFuSiOn Wrote:  Which warning comes up? Surely that should help them?

My 335i was running hot in traffic, basically the radiator fan was on constantly.. Car had a software update and Ll was good. The late F20 'overheated' as it had a sensor issue..

Good luck getting it sorted.

This. Some cars require a new radiator fan/control unit as well.

The waterpump/thermostat issue is common on the E-series cars and the above on F-series N55's.

Current: 2014 BMW M135i (F21) 8-speed ZF
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11-02-2017, 02:38 PM
Post: #12
RE: m135i overheating
Mine use to go into limp mode where power would be cut off but turns out it was a faulty thermostat, JSN sorted it out for me

Current:F82 BMW M4 - M-DCT
EX:BMW F20 M135i 8SPD ZF AUTO
EX:Ford Focus ST 250
EX:Ford Focus ST 225
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12-02-2017, 12:27 PM
Post: #13
RE: m135i overheating
(11-02-2017 02:38 PM)Quick///M Wrote:  Mine use to go into limp mode where power would be cut off but turns out it was a faulty thermostat, JSN sorted it out for me

thats what happened to me, thanks will ask them to check it out for me
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12-02-2017, 01:07 PM
Post: #14
RE: m135i overheating
(12-02-2017 12:27 PM)Taran Rodrigues Wrote:  
(11-02-2017 02:38 PM)Quick///M Wrote:  Mine use to go into limp mode where power would be cut off but turns out it was a faulty thermostat, JSN sorted it out for me

thats what happened to me, thanks will ask them to check it out for me

Here is the original thread with the issue I had

http://www.bmwfanatics.co.za/showthread.php?tid=68481

Current:F82 BMW M4 - M-DCT
EX:BMW F20 M135i 8SPD ZF AUTO
EX:Ford Focus ST 250
EX:Ford Focus ST 225
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12-02-2017, 01:43 PM
Post: #15
RE: m135i overheating
Maybe not the same problem, but I recently had issues on my moms N20

It would overheat, intermittently.

Took it to BMW they diagnosed waterpump and thermostat, car was then fine for a few months.

Then it started again, they diagnosed water pump once more, and it was swapped out under warrantee.

They then said it is still doing it, and gave me a quote to replace the fan and a bunch of stuff, nearly 40k

told them to go get lost, and I eventually found the issue as a broken wire to the water pump, it was intermittently losing power.

Replaced the wire, car has not said boo since..

I will be on the other side if anybody needs me Bluebiggrin
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18-02-2017, 11:37 PM
Post: #16
RE: m135i overheating
Thanks everyone bmw replaced my water pump and the car seems to be fineClapper
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