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E3 Spark Plug E3.48 Automotive Spark Plug

4.5 4.5 out of 5 stars 1,619 ratings

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Brand E3
Core Material Copper
Gap Size 0.04 Inches
Thread Size 14mm
Top Material Type Alloy Steel

About this item

  • Automotive spark plug that fits a variety of domestic applications, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions
  • E3's patented DiamondFIRE edge-to-edge electrode provides maximum performance with increased efficiency, and a faster more complete burn
  • Designed with colder heat ranges to enable performance modifications, and contains Yttrium-enhanced alloy for a reduction in side wire temperature for less pre-ignition
  • Includes one (1) E3.48 spark plug with a limited lifetime warranty
  • Primarily used in a wide variety of automotive and truck applications
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Additional Details

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E3 Spark Plug E3.48 Automotive Spark Plug
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Price$6.38-8% $44.99
Typical:$48.99
-9% $23.49
Typical:$25.88
$17.99$33.99$5.09
Delivery
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Customer Ratings
Value for money
4.2
5.0
4.8
4.0
Mileage
4.1
5.0
4.8
4.0
Longevity
4.0
4.9
4.0
Sold By
Nivi Stores Inc.
ADVENTURER'S BAG
NorthEast Cycle Shop
OYEAUTO
NorthEast Cycle Shop
Amazon.com
core material
Copper
Copper
Copper
Iridium
Copper
Copper

From the manufacturer

E3 Automotive Spark Plugs

E3 Spark Plug Key Features

E3 Automotive Spark Plugs

E3 Automotive Spark Plugs

E3 Automotive Spark Plugs

Nickel Plated Terminal End- Corrosion protection at the main contact point with your engine's ignition system.

Projected Insulator Tip- We have the deepest projections in the Industry, promoting better spark-zone refreshing between power strokes, without any negative side effects.

Spark Gaps Tailored to Your Engine- Unlike other 'premium' spark plugs that use a 'one size fits all' gap policy, E3 Spark Plugs have carefully optimized spark gaps chosen to maximize performance for each application.

E3 Spark Plug's patented (US Patent # 6.495.948) ground electrode design provides for more efficient burning of your vehicle's air/fuel vapor, leading to more pressure in the cylinder. These improvements are measurable, and confirmed as compared to the designs found in existing spark plugs. The DiamondFIRE electrode projects the spark further into the combustion chamber, bringing it closer to the most robust air/fuel mixture. The initial combustion wave leaves the spark area at supersonic speeds, and the elevated edge provides a chimney effect so the next round of air/fuel mixture gets into the spark zone more easily.

The E3 ground electrode design forces edge-to-edge spark discharge, which is the best way to get a spark to leave a surface. Sharp edges are better at initiating electron migrations, and these accelerated electrons collide with matter inside the spark zone to release additional electrons. This design ensures that the whole population of electrons works to create a plasma channel through which the spark current flows more easily, resulting in an increase in both power output and fuel economy, while reducing emissions in gasoline engines and the build-up of carbon deposits on engine surfaces.

Additional E3 Spark Plug Products

E3 Truck Plugs

E3 Small Engine Plugs

E3 Power Sport Plugs

E3 Racing Plugs

Truck Spark Plugs

E3 truck spark plugs utilize the latest E3 technologies to help engines operate with more power by and creating more pressure against the cylinder and more available fuel is put to work. Get more power, better fuel efficiency and a faster/smoother acceleration.

Small Engine Spark Plugs

E3 small engine spark plugs have the same patented Edge-to-Edge DiamondFIRE ground electrode that has been proven to burn fuel more efficiently. Bring your L&G equipment to life, with quicker starts, more power, better fuel efficiency, and lower emissions.

Power Sport Spark Plugs

For near perfect combustion, put in a set of E3 power sports spark plugs that are Born to Burn! Featuring the patented DiamondFIRE ground electrode, E3 power sport plugs provide more power, quicker starts, better fuel efficiency and lower emissions.

Racing Spark Plugs

E3's unique DiamondFIRE ground electrode helps to create more turbulence in the cylinder, and facilitate a faster flame growth. The result is more complete combustion, which results in more power and better consistency. E3 Racing Plugs cover a wide variety of Motorsports applications.

Why Choose E3 Spark Plugs - DiamondFIRE Electrode

E3 Spark Plugs - Born to Run

E3 combined their knowledge of performance spark plugs with the latest science to produce the unique DiamondFire ground electrode. This design mimics surface gap plugs used in rotary engines and reduces the flame kernel's travel time from the spark zone to the compressed gases in the engine's combustion chamber. The sharp edges produced by the DiamondFire design initiates strong electron migrations from the central electrode that improve the overall spark discharge. E3's multi-edge design is more efficient in creating a plasma channel to allow for a better flow of spark current, which burns compressed gases more completely and puts more of the available fuel to work in your engine.

Product Description

Product Description

The E3.48 auto spark plug is a 14mm, 0.750” reach plug with a gasket seat. It fits a wide variety of late model applications, especially import. E3.48 is widely stocked in automotive retail stores. E3 automotive plugs have three legs securing the DiamondFIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance for a guaranteed five years or 100,000 miles. Part Number: E3.48; Resistor: Resistor; Hex Size: 5/8"; Thread Reach: 0.750"; Thread Diameter: 14mm; Seat: Gasket; Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted. Our unique DiamondFIRE open design forces air gap discharges, creating the preferred edge-to-edge spark path. The design allows replenishment of the spark zone with a fresh fuel/air charge, and exposes the flame front more directly to the piston head than other plug designs. This distinctive spark plug design has proven to simultaneously increase engine power output, reduce gasoline consumption, decrease hydrocarbon and carbon monoxide emissions from the engine, and materially extend the life of the spark plug. Our lawn and garden spark plugs help engines operate more efficiently with a faster and smoother acceleration.

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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What's in the box

  • (1) Automotive Spark Plug
  • Looking for specific info?

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    1,619 global ratings

    Customers say

    Customers like the performance, quality and power of the spark plug. They mention that it runs considerably better, has more power and that it's pretty efficient. That said, some complain that the plugs didn't fit their car.

    AI-generated from the text of customer reviews

    134 customers mention113 positive21 negative

    Customers like the performance of the spark plugs. They say that their car runs considerably better, has more power, and is more efficient. Some customers also mention that the plugs work well and increase gas mileage. Overall, customers are satisfied with the performance and durability of these spark plug.

    "...Since then the new plug has been working great with no issues at all, and just like the original E3 we had been using before, this plug makes a..." Read more

    "...instantly notice the difference in acceleration and improved gas mileage on the freeway since I travel constantly...." Read more

    "...NOTABLE difference in performance." Read more

    "They will work good for a few weeks, but eventually they will crack your engine block...." Read more

    108 customers mention79 positive29 negative

    Customers like the quality of the spark plugs. They say they are a worth while purchase, good for 100k miles, and excellent quality. Some appreciate the price per plug.

    "...plugs we're 80k old so... They looked quality and I really appreciated the price per plug. These are 12 bucks from the dealership...." Read more

    "...These are solid copper core spark plugs and I know these will not last 100k miles...." Read more

    "...All in all, I would say these spark plugs are a worth while purchase that will eventually pay for themselves." Read more

    "...that this plug can stand up to 100k miles or km, it just looks like a cheap plug. I hope it can last at least 40k, and i'll be fine with that...." Read more

    25 customers mention18 positive7 negative

    Customers like the power of the spark plug. They say it provides a little more power and better gas mileage. Some customers also mention that their truck runs smooth and powerful again. Overall, most are satisfied with the power and performance of the product.

    "...First, some driving impressions. The car does run smoother and has more power...." Read more

    "...When he installed these I noticed the car running with more power, they’re pretty efficient as well. The engine performance feels like a new car...." Read more

    "...No huge power gains which I knew was not true and I got maybe 1-2 mpg increase on the highway that's it...." Read more

    "...smooth idle, good power, increased mileage.....)..." Read more

    12 customers mention12 positive0 negative

    Customers find the installation of the spark plug to be easy. They mention that it works great and is easy to put on with a magnetic wrench.

    "...The e-3s fit perfectly, z installed as easily as possible with all the hassles of the newer cars and seems to run great, maybe even a little better..." Read more

    "I like everything that it said very easy to install if you have the right tools I would highly recommend it thank you Amazon" Read more

    "Wasn’t that hard to install. You just need pliers to pull off the spark plug “boots.” Don’t pull by the wire, pull by the rubber piece...." Read more

    "Easy to put on whit magnetic wrench I put high temperature silicone on the boots and top spark plugs and anti size on the tread of spark..." Read more

    8 customers mention4 positive4 negative

    Customers are mixed about the temperature of the spark plug. Some mention that it produces very low heat, while others say that it fires hotter and lasts a lot longer. That said, some say that they lower engine temps and burn much cleaner, while other say that the spark causes a rise in engine temperature.

    "Good plugs I have them in my small block 403 and they burn much cleaner now and I also run them in my lawn equipment but they were shipped loosely..." Read more

    "...Almost cross-thread my engine block. Causes a rise in engine temperature, maybe 1 - 3 degrees max...." Read more

    "...This little plug produces very low heat." Read more

    "...They get so hot then you will see white smoke coming out of your tail pipe from coolant leaking because you have to replace the head gasket and then..." Read more

    29 customers mention8 positive21 negative

    Customers are dissatisfied with the fit of the spark plug. They mention that it didn't fit their car, the threads were too short, and the piece was too fat.

    "...One of the set had threads that were not 100% machine properly. Almost cross-thread my engine block...." Read more

    "They looked nice but are too fat to fit my vehicle." Read more

    "...So, any change would be an improvement. The e-3s fit perfectly, z installed as easily as possible with all the hassles of the newer cars and seems..." Read more

    "These do NOT fit a Jeep 2007 as Amazon suggested they did. I spent $10 EACH on 4 spark plugs... only to find out they were not even the right ones...." Read more

    Vehicle Tune Up w/E3 Spark Plugs
    4 Stars
    Vehicle Tune Up w/E3 Spark Plugs
    I've ran E3 spark plugs in three different vehicles and I have had zero spark plug failures thus far. I installed (16) E3.48 w/new NGK plug wire set and my 03 MB ML500 runs well. It cranks right up, idles and runs nice and smooth.This is the first newer version E3 spark plugs I've purchased and I will be keeping a close eye on this set. These are solid copper core spark plugs and I know these will not last 100k miles. Also, I am apprehensive after reading some of the negative reviews. However, when someone states they ran the plugs for a few days to a few weeks or months, it's no good when they post pictures of spark plugs that look like they have 50k miles while in a severe oil burner.I do not run any spark plugs for 100k miles. NONE! However, I do not use platinum or iridium spark plugs. For the price and the performance, it's difficult to beat copper NGKs. Those are all I would run years ago.So as of this time, the E3 spark plugs are working well in my ML and I do hope they last as long or longer than earlier versions.
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    Top reviews from the United States

    Reviewed in the United States on January 7, 2015
    10 people found this helpful
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    Reviewed in the United States on March 18, 2020
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    Reviewed in the United States on October 13, 2023

    Top reviews from other countries

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    Marcel B.
    5.0 out of 5 stars Hard to find spark plug
    Reviewed in Canada on August 7, 2021
    Alejandro M.
    5.0 out of 5 stars Mejor rendimiento para mi coche
    Reviewed in Mexico on July 19, 2021
    Paoli Pasquale
    5.0 out of 5 stars La perfection
    Reviewed in France on December 12, 2019
    Adnan Porobic
    5.0 out of 5 stars Good spark plugs.
    Reviewed in Australia on June 21, 2021
    Pazc
    5.0 out of 5 stars Lo recomiendo
    Reviewed in Mexico on March 5, 2019