Question about 2003 BMW 5 Series

1 Answer

How do I replace the radiator fan on 2003 BMW 525i? The problem is the fan cover is in the way and the radiator will not come out? But All of these thing are in the way...! Also I need to replace the temp thermostat. They keep saying "Remove the fan clutch and fan and cowling..." That is the problem...I cant get it out.

Posted by on



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,272 Answers

Replacing fan cowl :--
Remove fan impeller with fan clutch from water pump. Remove coolant expansion tank from fan cowl. Note: Coolant lines remain connected. Remove auxiliary water pump from fan cowl. Note: Coolant lines remain connected.
Unclip AUC sensor.
Lever out expansion rivets (1) on left and right. Detach sealing strip (2). Installation: Pay attention to installation position of sealing strip. Lift out fan cowl and fan impeller together.
Installation: Attach fan cowl in retaining lugs at bottom and sides.
Removing and installing radiator (M54):----
Warning! Danger of scalding! Only perform this work after engine has cooled down.
Drain coolant. Remove fan cow.
Lever out spring (1). Remove water hose (2). Release screws (3) on left and right of radiator. Remove both brackets (4). Installation: Follow instructions for working on cooling system.
Disconnect plug (1). Lever out spring (2). Remove water hose (3). Installation: Slide spring (2) back. Water hose (3) must snap audibly into place.
Lift out radiator.
Installation: Pay attention to rubber mounts on left and right.
Installation: Install radiator with rubber mounts on left and right in bracket.
Top up coolant. Vent cooling system and check for leaks.
If  cowling out the fan is in the way then :-- Here are the instructions for fan removal.
I have found putting a 32mm wrench on it and hitting it with a mallet works good to break it free, also a impact hammer with a long bit works well as well instead of the special tools.
Removing and installing/replacing fan clutch (S52 / S54 / M52 / M52TU / M54 / M56)
Special tools required:
11 5 030
11 5 040
Important! Left-hand threads. Using special tool 11 5 030, grip pulley and unfasten cap nut from water pump using special tool 11 5 040. If necessary, unfasten fan cowl. Take the fan wheel with fan coupling off the water pump and remove.
Installation: Tighten down fan impeller using special tool 11 5 040. Tightening torque 11 52 1AZ. Note: When using special tool 11 5 040, 30 Nm on the torque wrench scale are equivalent.

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Jul 09, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I'm replacing a water pump on my 1990 BMW 525i and I don't no how to remove that thing where the spark plugs go and the rotor 2nd I'm also need to remove the timing belt cover can I get the 3rd bolt out...

STOP what you are doing before you damage something!! Whatever you are trying to remove is not the water pump. Neither the sparkplugs nor the "timing belt" cover needs to come off. Remove the fan belt. Remove the fan (the nut is LH thread- means it turns left to tighten and right to loosen). You will need a large wrench (32mm) availible at sears.The water pump is directly behind the fan and is held in by 4 10mm bolts.

Aug 17, 2014 | 1990 BMW 525i

1 Answer

1990 BMW 525i 2.5L engine overheats after rplaceing water pump, stermostat,fan clucth,radiator

There's trapped air in the cooling system.
  • You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
  • With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
  • Just keep adding water until no more air bubbles come out then just put the screw back in place.
  • Then fill the expansion tank to it's normal level/line.



May 07, 2014 | 1990 BMW 525i

1 Answer

My 1990 BMW 525i is over heating

Try replacing the thermostat. It is supposed to open when the water temp reaches a certain point usually around 180 degrees. It might be stuck in the closed position.

Sep 28, 2012 | 1990 BMW 525i

1 Answer

Can't find oil drain plug on 2003 BMW 525i

The oil drain is on the bottom of oil pan off to the side. you will need to remove the lower engine covers to get to the drain plug.

Apr 01, 2012 | BMW 525 Cars & Trucks

2 Answers

1995 BMW 525I over heating issue. I repaired head

Hi, Sounds like you have tried about everything. Ok the aux. coolant switch is for the electric pump for the heater core will not cause an over heating condition just a longer warm up of the heater core. Has the cooling system been bleed properly if there is a trapped air pocket it will not let coolant circulate. Was the new thermostat installed correctly? They have a vent that needs to be towards the top or they trap air on the back side and cant take an accurate reading to open and close. Other areas to look at would be proper operation of the fan clutch, if they fail they can cause the fan to not lock up properly and supply enough air movement through the radiator. The aux. electric fans and their temp switches do you hear them coming on are they coming on at the right temp.

Aug 26, 2010 | 1995 BMW 5 Series

2 Answers

Hi i have BMW 525i 2004 from time to time when

It is very important that the engine not overheat! The head can crack and this would be very bad.
I think your car is too new to need a new radiator.
Make sure the coolant level is correct.
Check the thermostat housing for leaks.
When the engine is hot, check if the fan clutch is locked up and actually driving the fan. Turn the engine off and grab the fan and try to turn it. It should turn stiffly. If it spins freely the fan clutch is dead.
It is possible that the water pump impeller has failed, especially if it is a plastic one.

Jan 21, 2010 | 2004 BMW 5 Series

3 Answers

BMW 525i Overheating, already changes thermostat, water pump < what do I check or do has 110K miles

Are you sure the Fan is turning to cool the Engine? If it is not coming on to cool Engine Check the Rad. cooling fan relay.

Jan 04, 2010 | 1995 BMW 5 Series

2 Answers

Can 2008 BMW 528i ignition coils be used for 2003 BMW 525i

According to my cross reference,the coil for 2008 528i is the same as 2003 525i.

You should use the same brand of coil so the internal resistance is the same.

Dec 25, 2009 | 2008 BMW 528i Sedan

1 Answer

2001 525i

yes you have , and the fan too.
Fan nut has a left hand thread.

Jun 25, 2008 | 2007 BMW 525xi Sedan

Not finding what you are looking for?
2003 BMW 5 Series Logo

Related Topics:

474 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Anthony Jones
Anthony Jones

Level 2 Expert

128 Answers

Chris Bowser

Level 1 Expert

18 Answers


Level 2 Expert

102 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides