1999 Jeep Grand Cherokee Ignition Coil Pack - 1AECI00166

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Product Reviews
Vehicle Fit

The ignition coil pack is a crucial part of your ignition system. It's function is to convert the 12 volt power of your vehicle's electrical system in to 35,000 or more volts. This produces a high intensity spark at the spark plug which then ignites the fuel in the cylinder. Coils in general will wear out over time and cause a misfire condition. In engines like this that use a coil pack, if one coil goes bad, the complete assembly needs to be replaced.

This Ignition Coil pack features the following specifications:

  • New not remanufactured
  • Replaces dealer part number: 56041019
  • Built to strict quality control standards
  • Direct replacement
  • 100% factory tested
  • Fits the following Jeep 6 cylinder engines as listed:
    • L6 4.0L


Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Direct Fit Replacement

Guaranteed to fit and function properly for your specific application.

Optimum Performance

Meets or exceeds requirements of the vehicle. Provides the correct primary and secondary resistance, voltage output, and spark energy needed to restore original operating condition.

Premium Quality

Manufactured with quality materials to meet highest quality control standards in the industry.

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

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

5.00/ 5.0
2 reviews
5 Stars
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1 Star
Came in fast. Was perfect fit. Highly recommended.
July 24, 2017
Prefect parts
Hi Russell here i went to midas to start with for an oil change i also was a ase certified mechanic back in the 90s and ask them also check why my 1999 jeep was missing they wanted 173.00 for the part and to install it another 90.00 you do the math and they wanted 73.00 for the other part and hope my check light would and then i found by luck 1A AUTO. I got both parts with over shiping for like 90.00 i think the ingition coil slip right on in but on the hand the crankshaft position sensor turn out to be no good i called 1A to let then what happen they sent a brand new part no questions asked and they told me deposed the old part they said i was most likey a factory defect i had my the next day i havent put in yet do to weather but 1A Auto they are very friendly and they make sure that you have the right part and you can work your car with ease 1AAuto is the way go when need a part next time you need a part think 1A Auto they are the way to go when you need a part they will make you ???
February 15, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Will it require an adapter to plug into original wiring ?
Jason E March 10, 2016
No, its a plug and play with no alterations
Brian F March 10, 2016
When I replaced my ignition coil I did not have to replace any of the original harnesses. I would recommend that you inspect the connectors to make sure they are not worn or weathered and have a tight connection on your new coil. As an added precaution, I wrapped the connector with electrical tape just to be on the safe side and give it a little additional protection. I thought it was also a good idea to go ahead and replace the plugs since I had everything apart. other parts to take into consideration to replace at the same time was the crank shaft position sensor and the Camshaft position sensor. I did each one at a time for process of elimination.
Allen S March 10, 2016
Nope.. Direct plug in ... Just install and go
JUAN Q March 10, 2016
No it bolts right on and plugs in very simple
Jeremy P March 10, 2016
No Accessories needed just plug it up u should be good to go.
Altonio B March 10, 2016
Year Make Model Description
1999Jeep Grand Cherokee Jeep Grand Cherokee Ignition Coil Pack L6 4.0L
Part #: 1AECI00166

Order must be placed by 4pm ET
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Estimated Arrival Cost

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Get it in: 2 - 4 Business Days

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