Delphi Ignition Coil Review: Complete Guide

The ignition coil is a small electrical inductor that raises the voltage of your battery from 12V to 40,000V.
Ignition coils fail for a variety of reasons, including age or being overworked. For example, if the spark plugs are damaged out or the wires are experiencing enough resistance, the ignition system will have to work much harder, leading to issues.

You probably want to keep your vehicle’s power, fuel, acceleration, and efficiency, but a faulty ignition coil does the opposite. A solid and long-lasting ignition coil is essential for both auto repairs and extending its overall lifespan.

If you’re having trouble deciding which coil meets your daily needs while also being within your financial means, don’t worry. Just keep reading the Delphi ignition coil review, and you will find out.

Delphi ignition Coil Full Review:

Ignition coils must be replaced after your vehicle has gone approximately 100,000 miles.

Several ignition coils, even so, will fail long before this threshold is reached. Therefore, check engine lights as soon as you can and don’t wait if it continues to flash. Delphi ignition coils may be a better option for you. Let us investigate why:

Access the OE test

Reviewing Delphi ignition Coil

Delphi coils have analyzed the harsh environment that ignition coils must withstand using their more than 100 years of OE ignition system experience and expertise. And they realized how temperature, high and low vibration, and even the failing of other components like spark plugs can trigger ignition coils to struggle.

The Delphi coils passed a standard 230-hour thermal cycle test with flying colors. During the first two hours, three competitor coils failed.

Two competitor brand coils were melted, and one did not fire.

These brands showed signs of stress, such as degraded plastic that was no longer strong enough to keep the spark inside the coil. As a result, there was a misfire and charred plastic.

Precision Manufacturing Processes

Someone holding ignition coils

Intelligent manufacturing backs up their innovative ignition coils design. Delphi coils control the length of wire between adjacent windings that are important, using high-quality wire coating that resists pressure.

And also, Delphi uses winding process techniques. This is significant because greater length results in greater voltage differences. As a result, more pressure is created, which may cause the insulation inside and wire coating to fail. 

Greater Insulating Power and High Quality

Delphi ignition coils are with electrostatic paint coating. As a result, consistent coil inductance remains consistent and prevents lamination separation. The coil is constructed with high-quality coatings and wires that resist the cracks, pinholes and imperfections that may lead to failure issues.

Epoxy Vacuum Technique

Delphi has higher epoxy’s insulation quality. Air bubbles in epoxy are reduced using epoxy vacuum techniques. Because having fewer air bubbles increases the ventilation performance of the epoxy and reduces the likelihood of energy punch-through errors.

The manufacturer also employs vacuum techniques for the epoxy, which results in fewer bubbles. As a result, the likelihood of energy “punch-through” is reduced.

Compact Design

Delphi ignition coil design

Delphi coils come with an innovative ignition coil design. Fewer proven materials are used in a smaller, more compact design, which results in a narrower pairing to the electromagnetic conductor.

It is a structure that provides energy efficiency as well as engine performance and optimized fuel efficiency and starts consistent engine performance.

Precise Spark Timing

It has Increased engine peak performance through more precise spark timing response. Delphi ignition coils will undoubtedly spark outrage! Precise spark timing improves fuel economy and accelerates crank-to-run time. These coils deliver precise electrical energy to the spark plug, resulting in voltage potential.

As a result, you get better control over emissions, better engine performance, and better fuel economy. Delphi ignition coils provide the electromagnetic capacity level, durability, and performance that your vehicle needs.

Perfect Fit

Legitimate installation on the spark plug allows the spark to travel a shorter distance to the spark plug. Furthermore, the coil placement ensures a tight fit in the plug hole for effective sealing.

Corona-resistant Case

Delphi pencil coils are stored in a corona-resistant case, allowing the coil and essential igniter module to be fully embodied in a single coil package.

Pros and Cons

Delphi ignition coils, like other coils, have some strengths and weaknesses also.

  • Uses winding process techniques to control greater wire length.
  • The controlled length winding reduces the possibility of voltage drop and original equipment that can often lead to failure issues.
  • Increased power output.
  • Has an impressive ability to deal with stress.
  • Excellent heat resistance as a result of high-quality material manufacturing.
  • Few misfiring cylinders.
  • Some indications of the coil not fitting properly.
  • Buyers are confused because it is unclear whether the product is made in China or the United States.
  • Installation takes about 2 hours.

If you don’t bother bringing in the effort to install the product, this is the best option for you. You can always get assistance. However, I would recommend saving up for the workshop in order to be prepared for any future mishaps.

Top 3 Delphi ignition coils Recommendation

6 Delphi ignition coils

Every year, Delphi manufactures over 10 million ignition coils for North America. And those are all engineered to OE design specifications for Toyota, Ford, Lexus, Nissan, Mazda, GM, Acura, Subaru, and other vehicle manufacturers.

Depending on your vehicle, I would recommend one of the three options below if you are unsure which one to choose.

  1. Delphi GN10328 Ignition Coil
  2. Delphi GN10164 Ignition Coil
  3. Delphi GN10168-11B1 Ignition Coil

Our FInal Recommendation Based on Experience

Brand new Delphi GN10164 Ignition Coil

To be honest, which one you should choose is entirely dependent on the model of your vehicle. And I don’t want to keep you here for eternity, as explaining each one of them would take so.

However, I use the Delphi GN10164 Ignition Coil with my F80, which has significantly more power out of the box than N54 engines. You don’t have to go with a full set; perhaps start with three and replace the bank with misfires.

For what it’s worth, I’ve replaced a lot of plugs & coils while tuning people’s cars. I remember, once, a man showed up with 2007/08 335 and complained about misfires as soon as I put a tune on it. It’s as if the coils were tuned to a certain voltage and then knocked out when the voltage increased. So keep that in mind and stock up some in case. 

Delphi vs Bosch: Which one should you get?

There are many different opinions when it comes to Delphi vs Bosch coils. Mostly because they both have almost similar specs and quality, and also they both come with a fair price.

However, let’s look at the few differences they have.


The market is huge and, to be honest, overwhelming when you consider the number of choices available to you. Even after conducting all the proper research on the best ignition coils, one can end up getting the smaller end of the wishbone when finally making a purchase.

But don’t worry! Whichever you choose from Delphi and Bosch, just keep in mind that an ignition coil that provides the best features and performance for your engine and is compatible with your vehicle is a wise option. Remember, a smoother sound for the ears and better mileage are just some add-on perks that come as a bonus with a fresh coil.

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