Enhanced Efficiency: Up to 15% more energy transferred to spark plugs
High Temperature Epoxy: Enhanced service life
Faster rise times and duration
Improved throttle response
Item Condition:New
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
How to Replace Ignition Coil 2002-05 Mercury Mountaineer 4-6L V8
How to Replace Ignition Coil 2002-05 Mercury Mountaineer 4-6L V8
Created on: 2014-10-13
Tools used
7mm Socket
Ratchet
11mm Socket
1. Removing the Engine Cover
Remove the two 11mm nuts from the engine cover
Lift the engine cover up
Disconnect the hose on the back of the cover
2. Removing the Ignition Coil
If needed, loosen the air intake hose clamp and remove the air intake hose to access coils 6 and 7
Remove the 7mm bolt from the ignition coil
Disconnect the ignition coil harness
Lift the ignition coil up and out
Remove the boot with pliers if it will not pull out
3. Installing the Ignition Coil
Insert the ignition coil into place
Tighten the 7mm bolt to the ignition coil
Connect the ignition coil harness
Repeat the process for any other coils
4. Reinstalling the Engine Cover
Clamp the hose to the engine cover
Insert the engine cover into place
Tighten the two 11mm bolts to the engine cover
Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.
Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to show you how to replace the ignition coil on this 2003 Mercury Mountaineer with the 4.6L V8 engine. The items you'll need for this include a new ignition coil from 1AAuto.com, and 7mm and 11mm socket with a ratchet.
Start off by removing these two 11mm nuts. We'll fast-forward as Mike does that. Now lift the cover up and you'll feel it release from the bracket. Pull it forward and then just open up this clip and pull the hose free and your cover's free.
The 4.6L V8 has a coil for each cylinder. On this side pretty easy to get to: one, two, three and four. Over here on this side you can pretty easily see that one that's here in the back. If you wanted to get to either one of these two here, you remove this screw and pull this from there, and you can pull these hoses off. Then the front one is right in here. Now just remove the 7mm bolt that holds it in place. Push the tab on the harness and disconnect it. Then pull the ignition coil up, bend it to the side, and then lift it up and out. The boot may stay behind if your ignition coil is in rough shape, so use a pair of pliers, reach in and pull the bottom of the coil up and out.
On the left is the old ignition coil; on the right is the new one from 1A Auto. You can see they're identical, and they'll fit exactly the same.
Take your new ignition coil and feed it down into place, and back underneath your fuel rail. Once you've got it lined up replace that 7mm bolt and just start it by hand, and then tighten it up with your socket and ratchet. Reconnect the harness and then repeat for any of the other coils that you might want to replace.
Once you've replaced whatever one you want to replace, put the cover back in place. Put the hose back on the back and clip it in place. Line up the two bolts in the front. Once you do that you can push the clips down there in the back, then put those two 11mm nuts back in place and tighten them up.
We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.
ICA64251
In Stock
Product Reviews
Loading reviews
4.75/ 5.089
89 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
74
10
4
0
1
Worth the money!
Thearon
March 13, 2020
Added to a change of spark plugs .my car is running extra smooth
Mary
May 7, 2020
Thanks for the parts, cost was reasonable.
Auto parts
P
May 13, 2020
I recommend this place for all your vehicle needs,five stars
Dale
August 3, 2020
Gets great gas mileage now
Great item
Timothy
August 21, 2020
Great product exact fit
Very easy to install
Kevin
September 7, 2020
These installed very easy , I wasn't expecting much change on how my car ran but now my mustang runs very smooth and the check engine light does not come on every 5 min
Easy to replace The old ones with these
Gordon
October 8, 2020
Job made so easy with these plug and play. Not a problem one and truck runs so much cleaner after replacing.
Best Performance Coil Set
Viola
October 18, 2020
There's no reason to look further when shopping for the absolute best coil set for your vehicle. If it'll fit your vehicle, this is for you! Great product and excellent performance! Honest Seller and the Best Deal. I highly recommend this seller...
D
October 19, 2020
2000 Ford F-150 runs smooth and saves gas!! Great but!!
Was great first time
rob
November 12, 2020
This second set i bought first was great 2nd had 2 bad coils
William
December 2, 2020
It was quick an on time product was nice !! Was very impressed with everything
Great product !
Roland
December 11, 2020
Recently installed these coil packs on my 01 5.4 liter and couldnt believe the difference they made. My mechanic only found one bad coil pack which he replaced 3 months ago. But I still was experiencing misfires and hesitation. I replaced all 8 with these packs and the difference was dramatic.
Fantastic
Matthew
December 19, 2020
OE fit, look great and Preform Even better. Engine is running smoothly and the Power Shows !
Great product and price
Jeremy
December 22, 2020
I liked the price. Great quality too. Although, it does state in name as being "High Performance," I don't experience or can tell in anyway a performance increase. I don't have a dyno so I could be wrong. Anyways, the performance that is there is great. I would recommend because of the price comparison to an auto parts store
Awesome product n service
Domingo
December 30, 2020
Installed on my truck n they work great no need to go buy the expensive motorcraft ones these are great quality n performance for ur bucks highly recommend them also purchased the spark plugs as a package
Excellent and affordable
C
January 17, 2021
They were wat cheaper than buying the OEM in stores, and fit just right. Combined with new spark plugs j can definitely feel a difference in power and performance. Would definitely recommend these and buy them for any other car I have
Great
L
January 27, 2021
Great price and quality. Got the correct items, quick delivery.
Coil packs
david
January 27, 2021
I ordered online hassle free a set of coils for my 08 f150,,TRQ brand,,and actually got them 1 day ahead of the quote on shipping,,everything works great,and I really dig the red contrasting against the black engine,,so far over a 1k miles and runs like a top,,I highly recommend these if your on a strict budget because performance wise they're as good as the motorcraft,,now only time will tell but hell yeah
Great coil packs.
Erin
January 29, 2021
The 8 piece ignition coil pack shipped quickly and was packaged nicely. Quality product with a solid feel. I bought these for an 2001 f150 with the 4.6 liter engine. Matched the oem in feel and weight. These coil packs fit easily and look great with the color option. I am very happy with the performance, I have gained a smoother idle and stronger a running engine in a truck with 230,000 miles on it. I am very happy I found these coil packs at a bargain price over factory, I saved money and gained some eye appeal. I strongly recommend these ignition coil packs as a replacement for any oem part.
TRQ coil packs
Thomas
February 24, 2021
Item shipped on time, on-line video made for an easy install. My 2009 Ford Crown Victoria is running like new again and shows a significant increase in power. I am extremely satisfied with their perfomance!!
Always Satisfied
J
April 8, 2021
Once again I'm very satisfied with another purchase. On time and all of my parts are there in good condition and my 2008 Ford F150 FX2 Sport is running superb.
Great Product
Kelly
May 21, 2021
I always have good luck with 1A Auto parts and these were just what I have come to expect from them. A great product that came packaged nicely and felt like quality from the start. As soon as I put them on the truck I noticed the difference right away. I would recommend this product for anyone looking to replace their coil packs
Better than OEM
Joseph
June 3, 2021
The ignition coils fit perfectly, just like 0EM parts. The Ford 5.4L runs smoother and is more responsive. I like the red color of the coils, because I can see them more clearly than the original black coils.
Fantastic! Fast and High Quality
Daniel
June 8, 2021
These ignition coils are worth the few extra $ over the competition and will still save you a ton over OEM! We installed them on a 2011 Ford Crown Vic Interceptor and the difference was immediate and just awesome.
long overdue upgrade
Donald
June 27, 2021
4.6 V-8 in Mercury is running good even with 87 octane
Juan
August 7, 2021
Good price & good product!!. FOrd F150 4.6L 8 Cyl
James
August 14, 2021
My truck runs perfect now with the new coils installed and spark plugs that I had
Jessie
September 4, 2021
Put them on customers vehicle, after repairing the sparkplug threads with timesert permanent thread insert, and new plugs, Ford 97 F150 5.4ltr. ran well when done, fit like factory*****
Great
Jose
September 27, 2021
Good price. Arrived when promised.
Spark plugs and coils were as advertised,took some time getting to me,but they are what is listed and work good.
Good products, installed without complications runs alot better. Only issue is didnt change the fuel milage for the better, still the same but runs good.
Eduardo
October 26, 2021
I love it and my truck runs amazing with alot of power
John
November 9, 2021
So far after 3000 miles they have been flawless. Very happy with them.
TRQ coilpacks
Victor
November 22, 2021
So far so good engine light turned off great product
Great parts
Kevin
December 25, 2021
They work great.
otis
January 2, 2022
worked great
kerry
January 18, 2022
I replaced my spark plugs and ignition coils. They made a world of difference.
Worked
Phillip
January 20, 2022
Worked fine so far, little skeptical about the low price. Appears #8 cylinder got water in the spark plug well judging by the rust.
Felix
January 26, 2022
Solves my issue with my truck immediately after it was installed.
It's a ford,so.....yeah.
Jack
January 26, 2022
I received the parts I ordered a day earlier than expected , what a blessing. I installed them in my 99 f150 that was running ratty. It's like I have a brand new 5.4 under the hood. I'll be ordering more parts.......but it's a ford, so...yeah, it's a ford.
ngel
February 8, 2022
Really amazing
The quality surpassed my expectations
The difference of performance was instant love
Thanks again for your help and your business
Obviously 1A Auto is becoming a hobby
Haha ??
Im looking forward to fix anything now!!
TF
February 21, 2022
Perfect fit they work great would highly recommended
David
February 28, 2022
Very helpful by making sure I ordered the right parts and taking me through it.
Delivered in time and they worked!
AB
March 7, 2022
We needed these in crunch and they delivered them promptly. Thank you.
Great product exactly what I was hoping it would be
Michael
March 10, 2022
Great product exactly the same as in the picture great bang for the buck and fast shipping had them 3 days after placing the order
Dan
March 15, 2022
Worked perfectly out of the box no issues.
GREAT PRODUCT!
Russ
March 24, 2022
MY 03 F150 was getting 10 miles to the gallon at 120k miles. I purchased the high performance coils because it saved me alot of money compared to Ford factory coils. My truck is getting 18- 20 mpg after installing new plugs and coils. The coils are great!
Jay
March 31, 2022
Great price and right fit
Jose
April 3, 2022
Awesome
ford e150 2014 ignition coil set
JUSTIN
April 15, 2022
fit great for my 2014 ford e150. Dont know if it made a noticeable improvement, but 170,000 miles and they were due. Fit great and like my 5 other orders from a1 auto - the quality, packaging and youtube installation videos are always 100%. Plus you cant get a full 8 coil set for a better price. Red is a nice color touch to the engine. End caps had sufficient lubrication on spark plug fitment. I installed all in about 1.5 hours and had no issues with codes so all made great contact. Im at about 10,000 miles now with them installed.
Matthew
April 17, 2022
Parts came quick. Installation was a breeze. Love 1A Auto!
Quality parts and experience
James
April 30, 2022
TRQ spark plug ignition coil set working flawlessly. Very easy installation on my 98 Lincoln Town Car. I had some concern about being manufactured in China, but given 1A Auto's overall experience and quality I've never been disappointed , and this proved to be another quality experience from 1A Auto.
I replaced all the coils at the same time. Truck works better than ever before.
William
May 16, 2022
For the price it was worth taking a chance on non Motorcraft brand. I will purchase this brand again. I drove 200 miles with a heavy load the day I fixed the truck with no issues.
Perfect
Coilean
May 26, 2022
Fast and simple way to get your truck running smoothly again.
Impressed
Tyquan
June 9, 2022
Good Coils...Slight Power Adjustment...
Great Response.... Lovely Price...
Fit 03 grand marquis
Brian
July 14, 2022
Fit my 03 grand marquis.
Did not solve the studder at idle i am dealing with though. Factory ones were probably still fine, but thats what you get for throwing parts at something instead of taking it to a shop i guess.
As for power and fuel efficiency, i saw literally no change what so ever with these and brand new plugs for the past couple months.
Low power and bad fuel economy must just be a ford thing.
Darel
July 17, 2022
Well worth it
Trq ignition coils
Darrell
July 21, 2022
Put these on my 2002 Ford f150 4.6 2 weeks ago with motorcraft spark plugs absolutely love them what a big difference highly recommend
Bangrong
August 16, 2022
Easy to install, good quality and great price
Joe
October 8, 2022
My average mpg hung around 18.5 mpg now it is about 20.5
Ethel
October 9, 2022
Awesome
Ken
October 24, 2022
Working well !!!
George
November 4, 2022
So far so good
Good enough
Pedro
November 7, 2022
They work great but these are by any means an exact fit. Different shape from OE where wires connect.
Coil over plug
John
November 17, 2022
Had them in about two weeks working good . OEM is really expensive. So will see but over all good products
Hudson
December 4, 2022
Always get what I need every time I order something perfect fit.
Mark
December 29, 2022
Another excellent part from 1A, thank you.
Garry
January 17, 2023
I like everything about this company, the customer service is awesome, the delivery is to much, the price couldn't be beat, i could go on and on about 1A Auto......Thanx...GW
Quick delivery even though it was freezing everywhere
Magdiel
January 25, 2023
Well it was for e150.
Am very impressed by the performance,I'll definitely will use them after each tune up
The right ones
Kelvin
February 7, 2023
Good parts and great service. For now on I'm going to order all my parts from a1auto
Smooth running
Gilbert
March 23, 2023
I haven't replaced all of the coils that need replacing but the engine is running a lot smoother. I am delighted with the price for all eight coils. At this time I am looking at other items to purchase.
Worked great got my car running back to normal
Antonio
March 26, 2023
Fit decently but not perfect on the boot seats. Did make a huge difference how it ran. Stopped my misfire. They are still going pretty strong over a year later on my 2000 grand marquis, also helped with gas mileage
Great coil packs!
Glenn
April 24, 2023
Did Plugs and coil packs for my 4.6. Perfect fit and noticeable acceleration improvement. Great performance and significantly less than comparable brands.
John
April 28, 2023
There great but the only problem is one of them blow out
Sammy
May 9, 2023
Shipping was fast. The coils were for a ford f150 and they fit and worked great.
Louie
May 23, 2023
Work well, smooth idle and good acceleration
2005 ford coils
Rafael
June 21, 2023
No difference in power on my 05 ford f150
Meh.
Adam
June 22, 2023
Not really impressed. Doesn't seem to over any sort of advantage over the stock ones I replaced. I had to replace one, so figured I'd give these a try. No difference in fuel economy or performance. They work so far and no duds in the batch, which I read some people can experience.
The installation was easy & the fit was perfect. No tools needed for installation. Gas mileage has increased & No ruff idol. I've driven over 500 miles no problems.
Scott
August 13, 2023
Working good so far.
sergio
August 23, 2023
Like that I received the order very quickly and for a decent price
For 99-04 mustangs you always hear about how you have to get coils from Ford bc everything else sucks. My misfire went away immediately after putting these in. I had no more misfires for the 2yrs I owned the car.
Best out there
Julien
August 22, 2024
Good deal good quality of parts
Ryan
September 9, 2024
Bad. Right out the box. Do not work. Do not recommend.
Steve
September 25, 2024
They have been working perfectly.
Carl
October 21, 2024
Just installed it so far all good I'm going to give it a couple of weeks
Ignition coils worked great. This is the 3rd lincoln i have owned and ive always gotten coils sparks and injectors from 1auto, 100% recommend.
Luis
December 4, 2024
Ignition coils worked great. This is the 3rd lincoln i have owned and ive always gotten coils sparks and injectors from 1auto, 100% recommend.
Customer Q&A
Customer service
877-844-3393
Monday - Friday 8:00am - 9:30pm ET Saturday - Sunday 8:00am - 4:30pm ET
Lincoln is a registered trademark of Ford Motor Company. 1A Auto is not affiliated with or sponsored by Lincoln or Ford Motor Company.See all trademarks.
Enter Vehicle Year Make Model
Specify your vehicle's year, make and model to guarantee fit.
Year
Make
Model
Options
Drivetrain
This part doesn’t fit a . Select from parts that fit.