how long to replace ignition coil and wires? - Subaru Outback - Subaru Outback Forums
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post #1 of 17 (permalink) Old 08-09-2012, 12:00 PM Thread Starter
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how long to replace ignition coil and wires?

Hello...my local Subaru dealership is quoting me over $200 in labour to repalce an ignition coil and wires. I'm not a mechanic but I understand that you remove the spark plug wires, remove the ignition coil (a couple of bolts) and do the reverse to install the new coil and cables. In my opinion, that should only take about a 1/2 hour. Thoughts/comments?

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post #2 of 17 (permalink) Old 08-09-2012, 12:33 PM
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we don't call them stealerships for nothing.

even if the book time is an hour, $200 sounds high. do it your self.

what car, engine, trans, year miles?

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post #3 of 17 (permalink) Old 08-09-2012, 12:39 PM Thread Starter
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Hi..thanks for the reply.

2009 Outback wagon, 2.5L gas, 5 speed manual, 34,000 miles
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post #4 of 17 (permalink) Old 08-09-2012, 06:04 PM
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It's an easy DIY job. Just a bit tricky to remove the three bolts holding the coil on the back of the intake manifold (because of the angle/access), but quite doable. I did it on my 07. I took my time but surely, for an experienced mechanic, not more than one hour.

I doubt they're charging $200/hour, so it must be the time. What are saying? I can't imagine the book time being more than an hour. Is that all they're doing? Not the spark plugs?

Might I ask why the coil and wires have to be replaced at 34,000 miles?
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post #5 of 17 (permalink) Old 08-09-2012, 06:40 PM
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Quote:
Originally Posted by plain OM View Post

Might I ask why the coil and wires have to be replaced at 34,000 miles?
Exactly, totally unnecessary. The plugs, wires and coil packs are part of the PCM/ECU engine management system. You will get a check engine light and a code if there was a problem with them. Leave them alone and find an honest, independent shop to maintain your Subaru.

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post #6 of 17 (permalink) Old 08-09-2012, 06:53 PM
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Exactly, totally unnecessary. The plugs, wires and coil packs are part of the PCM/ECU engine management system. You will get a check engine light and a code if there was a problem with them. Leave them alone and find an honest, independent shop to maintain your Subaru.
What he said! ^

If a coil fails you will get a cylinder not firing ie your running on three vs 4 etc. It is about as obvious as getting plunked in the noggin by a sledg hammer when this happens. Subaru coil failure is extremely rare by the way. And yes engine light will go on when a coil fails.

My 2001 2.5 was on its original coils at 180,000 miles and ran GREAT. Plugs were changed at 100K and were found to be very clean. The wires were replaced at that point also. Engine performance and mileage did not change with the new wires and plugs at 100K.


My 2001 VW 1.8T Jetta had multiple coil failures - VW basically wrote the book on how not to source and put cheap coils in cars. When the coils started to fail the driver generally notices an odd hiccup with the engine as if it missed etc the engine light on the dash might flash or come on then go off etc. Then very soon after noticing the hiccup the coil will completely fail at which point engine light on the dash will come on and stay on and at low speeds the engine is clearly not running correctly given only three cylinders are firing etc. There is one coil per cylinder by the way.
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post #7 of 17 (permalink) Old 08-09-2012, 08:54 PM
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Even for all the other vehicles I have, wires and plugs are scheduled at 60k. At the bear minimum at 60k, I can see the plugs according to service schedules.

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post #8 of 17 (permalink) Old 08-09-2012, 10:25 PM
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The reason they are quoting you $200 is that they are listing each as a separate item and billing the book minimum of an hour for each operation(coil 1 hour/wires another hour).You get the joy of paying for the same hour twice. Even if you did need a coil (which I doubt), to remove it you have to remove the wires at the coil end. So the wire removal is already half done as part of another operation. They should not bill this way, but many do. Any decent shop would bundle connected operations under the same minimum. It should be one hour total for labor.

My other car is a Subaru.... Come to think of it, so is my other other car

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post #9 of 17 (permalink) Old 08-09-2012, 10:45 PM
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A friend of mine has a Honda Civic... 1999 or 2000 model. At 25,000 miles, it started to misfire. I told her it seemed like bad plugs, and surely enough, the manual said they should be changed at 25,000 miles. Guys what happened at 50,000 miles... You could set a watch by it! I thought all cars were using 100,000 mile spark plugs by now. Way to go! Honda!

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post #10 of 17 (permalink) Old 10-03-2013, 09:52 PM
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I stood next to my mech while he did one H6 coil. Less than an hour, including removing belly-pan. Plug looked fine, so left untouched. Car has 100+Kmiles on it.

If coil DOES need replacing, you will get a check engine light and code first, and the car will run very unevenly as if someone poured water into your gas.

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