Q: I have replaced just one ignition coil, but not other 5. Will they fail, what mileage to change, and will it affect performance?

asked by on

I just replaced one coil but wonder if I am about to have a major failure. What do you think it should cost for 5 coils with labor on my Santa Fe? Will it effect the performance or gas milage until then? I do mountain driving in sub zero temps, and notice some recent decrease in gas milage and performance up the hill which is why I am asking. Trying to figure the budget and need. Thanks so much for your suggestions.

Email me if you want: shanemgustman@gmail.com

Shane

My car has 165000 miles.
My car has an automatic transmission.

If you take the price you paid for the one coil and multiply it by five the price will be close to what it would cost. Going up hills is always a gas usage problem and will affect mileage. You can replace one coil at a time or all at the same time. I would however recommend having all spark plugs replaced with the coils so you do not have to remove coils twice.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have replaced just one ignition coil, but not other 5. Will they fail, what mileage to change, and will it affect performance?

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

Get a quote

What others are asking

Q: When you turn on the ignition a couple of lights come on but it won't start

Confirm that the "new" battery is actually fully charged. Even if the immobilizer were set at one point or it activated, simply arming and disarming it, via the key FOB or remote, will disable the alarm. There is no "lock...

Q: I am having a issue with my car. I have replaced timing, camshaft, spark plugs, valve cover gasket and I keep getting random miss

You may have ignition coils that are giving out a weak spark and or failing intermittently causing the misfire. Also a system that is running lean may cause random misfires. have the coils checked for spark output after engine is...

Q: Using proximity key, car starts without holding down brake

One possible cause for the problem may have to do with the switch that tells the vehicle that the brake pedal is depressed. The switch may have failed in a way that continuously tells the system that the brake pedal...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...