Q: When replacing the AC Compressor, do I need to replace both expansion valves as well or just the front

asked by on May 31, 2017

My 2005 Honda Pilot AC compressor clutch coil is no good so I've decided to replace the compressor. I also plan on replacing the expansion valve and the condenser. I learned that the condenser cannot be flushed and should be replaced and that the desiccant bag is in one side of the condenser. I also learned that there are 2 expansion valves: one for the front AC and one for the rear. Should I be replacing the rear expansion valve as well? What problems might I run into if I don't?

My car has 149500 miles.
My car has an automatic transmission.

AC Compressor Replacement $672.08 - $2949.86 Get a Quote

Hi there. Anytime you replace major air conditioning system components like the AC compressor, it’s recommended to purchase all supporting hardware and replace it at the same time. AC works as a series of individual components working efficiently together to create cool air that flows into your cabin. As such, if you’re replacing the front expansion valve, it’s a good idea to replace the rear at the same time. This increases overall efficiency of the system, reduces the potential of small component failure and allows the parts you replaced to last longer.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Oil light goes off and on

The engine oil pressure may be getting too low at idle from the engine oil pump not pumping enough pressure or the engine bearing are worn and leaking excess oil past them when the engine is running. You could also...

Radiator fan cover???

Thanks for writing in about your 2003 Infiniti J35. This is the radiator fan shroud upper and lower. They are the same as a radiator fan cover. If you need to have a technician inspect your the noise to verify...

The vehicle shudders and makes a whirring noise at 50 mph when letting off the accelerator. Any idea on Problem?

Hello there, there are a few potential causes for the vehicle to have a whirring noise like this. The most common would be a drive shaft joint, CV axle, warped brake rotor, or a bent wheel. I'd recommend getting some...

Bought used. Need to erase PIN number. Phone

Hello, thank you for writing in. Resetting the system should be as easy as holding a few buttons and accessing the right menu. From there it should be rather straight forward once you reach the menu. On some models, you...

Door not unlocking or opening

You have several components on your door. Two specific ones that come into play here are the door handle and door latch. The door latch is what actually hold the door closed and where the locking mechanism is housed. There...

Rough misfire at idle.

Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...

Power window switch not working 2006 Chevrolet Impala

Hi there - check fuses/relays for the power windows first. If fuses and/or relays are good, your symptoms suggest that the power window master switch on the driver door panel has failed. I recommend a power window master switch replacement...

Erratic idle 2005 Ford Mustang

You may be feeling the a/c compressor engaging and should have the a/c system checked for problems with the compressor pulley bearing. If a/c is okay then you may have another issue with the water pump or one of the...

Flex pipe?

Based on the diagrams for your car, it looks like you will need a flex pipe with slip fit ends that will accommodate 2.25 inch OD steel exhaust pipe. You can confirm that by measuring the OD of the undamaged...

Related articles

The Best Used Cars to Buy for Families
If If it’s time for you to search for the top used cars specifically for families, check out the list we’ve put together of the top five. The list of must-haves Typical items that families are looking for in their...
The Best Used Cars to Buy If You Love Camping
Do Do you love camping, getting back to nature and enjoying life in the great outdoors? If you do, then you know that getting there can be half the fun, and it’s even better if you have a great ride....
The Best Used Cars to Buy If You're a Dog Breeder or Trainer
These These days, dogs are more and more likely to travel with people than ever before. After all, what dog doesn’t ride in a car? As a breeder and trainer though, you’re probably more likely to carry along dogs than...