Question about 2003 Toyota Corolla

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Find and replace thermostat 2003 corolla--thank you !

Find and replace thermostat on 2003 corolla

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Follow the lower radiator hose to the engine. Most Toyota's along this year model have the thermostat located in the engine, where the lower radiator hose connects to the engine. Changing the thermostat is pretty straight forward. Refilling is a little trickier. Search the top of the engine and find the bleeder screw for the cooling system. Open this bleeder screw, usually a 10mm, or 12mm socket will fit, and fill the cooling system with the recommended coolant. Pay attention to your mixing ratio as well.

Posted on Nov 10, 2008

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The heat gauge is going up close to the red then back down when running around 45 mph on a corolla

Posted on Dec 14, 2009

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2 Answers

Where is the thermostad situated on a 2003 1.4 corolla?


Location of the Thermostat

Open the bonnet to access the engine compartment. Locate the radiator in the front of the engine compartment. There are two hoses that run off the radiator. The bottom hose runs to the water pump and is where the coolant is pushed into the radiator and moves up through the ridges to allow time to cool off. The top hose is the hose that runs to the thermostat housing. Follow the top radiator hose to where it is clamped to the motor and you will notice a housing that the hose is clamped to. The housing can be opened with a socket wrench. This housing contains the thermostat. You may need to remove the radiator hose to access it. Unscrew the hose clamp and pull the hose off the assembly. Once the housing is opened you can pull the thermostat out with your fingers.

Jan 28, 2015 | 2003 Toyota Corolla

1 Answer

How to replace thermostat on 2005 Corolla


Hi Chuck !
You can find the solution here. Hope this help you.

How to replace thermostat Toyota Corolla. VVTi engine. Years 2000-2008.

How to change Thermostat Toyota Corolla. VVTi engine. Years 2000-2008.youtube.com

Mar 07, 2014 | 2000 Toyota Corolla

1 Answer

Location thermostat on 2003 toyota corolla


follow the radiator hoses 2 the motor normerly were the top hose connects 2 the motor is the thermostat housing.but on some japanese cars the thermostat can be on the bottom hose make sure motor is cooled down as there is a lot of heat&pressure in the cooling system

Oct 25, 2011 | 2003 Toyota Corolla

1 Answer

I am looking for where the thermostat on my 2003 corolla s 2.0 4 cylinder.. where is it located?


The thermostat is located in the water inlet housing that is connected to the lower radiator hose.
The thermostat is equipped with a by-pass valve. If the engine tends to overheat, removal of the thermostat would cause a decrease in cooling system efficiency.

TY for using Fixya (remember rated and comment this).

Apr 01, 2010 | 2003 Toyota Corolla

1 Answer

My Toyota Corolla has about 130 K showing,all original belts, the serpentine looks fine with no sign of checking on the under side. The timing belt,?? How many miles will they last, and does this engine...


Your 2003 corolla has a timming chain with no maintenance interval.
It is a good idea to replace your serpentene belt if it has not been replaced. Your motor is an interferance motor.

Sep 13, 2009 | 2003 Toyota Corolla

1 Answer

2005 toyota corolla ce is overheating when a/c is and i'm stopped


multiple corrections.. possible thermostat,fan, coolant. waterpump etc

Jul 18, 2009 | 2003 Toyota Corolla

3 Answers

Cant find thermostat


THE THERMOSTAT IS BELOW THE DISTRIBUTOR AT THE END OF THE UPOPER RADIATOR HOSE

May 04, 2009 | 2003 Toyota Corolla

1 Answer

How difficult to replace 1995 Toyota Corolla radiator/thermostat


You can replace the radiator yourself, but why do you need to? The thermostat is on the engine. Follow the large hose that goes to the engine block....not the water pump. The thermostat is under that or sits on the top of the engine....looking for a pic for you!

Mar 14, 2009 | 2005 Toyota Corolla

2 Answers

Check engine light on P0125


I have to tell this: Your dealer screwed up. The P-0171 remedy was to clean the Mass Air Flow Sensor, NOT replace an O2 sensor. The P-0125 indicates that you have the insufficient coolant temp, which is a thermostat sticking open. This is why your idle is so high, the coolant is not up to operating temperature, 192 degrees F...Clean the MAF and replace the thermostat, and tell the dealer that he screwed up on the O2 sensor diagnosis/replacement. They put an O2 on for no reason. Better yet, have THEM clean the MAF and replace the thermostat. They owe you that much.

Oct 12, 2008 | 2003 Toyota Corolla

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