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Updated on Jan 31, 2024

John Davis

Expert Automotive Writer

Reviewed by Kathleen Flear, Director of Content

Edited by Jessica Barrett, Senior Car & Insurance Editor

What's on this page?

How much does it cost to replace an electronic spark control?
Where can I get my electronic spark control replaced?
How will a mechanic replace my electronic spark control?
What happens if I don’t replace my electronic spark control?
What is an electronic spark control?
Can I replace my electronic spark control myself?
FAQs
Meet Our Experts

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How much does it cost to replace an electronic spark control?

For an electronic spark control replacement, you can expect an average total cost of $260 to $370, including $60 to $100 for replacement parts and $100 to $250 for mechanic labor costs. The exact price will depend on your vehicle.

How long does it take to replace an electronic spark control? It generally takes one to two hours for a certified mechanic to replace an electronic spark control. Your mechanic will inspect the vehicle to determine if a new electronic spark control is necessary, then follow through with the full replacement process.

How did we estimate these prices?
Jerry's experts researched and collected data from 2500+ real repair shops in all 50 states in the US, including everything from the total cost of repair services to the hourly labor cost for mechanic labor in each shop. We combined that data with our expert database of hundreds of real repair jobs, thousands of real cars, millions of real car part prices in order to best estimate the cost of each repair service. Our labor cost estimate is calculated by taking the average hourly labor rate for a certified mechanic in the US, times the number of hours it takes on average to complete a repair. We recommend you compare your local shops with Jerry and contact those shops directly to get final pricing for your vehicle.

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What parts do I need for my electronic spark control replacement and how much do those parts cost?

You can check your owner’s manual or ask your mechanic for your manufacturer’s recommended parts, but here’s a general rundown:

Electronic spark control module (ESC): Based on cues from your car’s computer, the ESC module is responsible for speeding up or slowing down the ignition timing based on various operating conditions. The ESC module’s process helps to reduce emissions and improve performance. ESC modules typically cost $50 to $200.

Gasket or seal: Depending on your vehicle, there may be a seal or gasket between the ESC module and your engine. When replacing your ESC, it’s also a good idea to replace this gasket or seal. ESC gaskets and seals cost $5 to $20.

Electrical connector: Your ESC module uses an electrical connector, which may need to be replaced with the module. These connectors usually cost $5 to $20.

Dielectric grease: Dielectric grease is used to improve conductivity and prevent moisture buildup on electrical connections. This may be required for your ESC module’s electrical connections. Dielectric grease costs $10 on average.

You can buy electronic spark control parts for your car from auto parts stores like AutoZone, Advance Auto Parts, and O'Reilly Auto Parts, as well as online retailers such as Amazon and RockAuto. Three brands we recommend for electronic spark control parts are ACDelco, Standard Motor Products, and Delphi, but the right parts and brands will depend on your vehicle’s year, make, and model.

Should I buy OEM or aftermarket parts?

For an electronic spark control, you should opt for OEM parts. Your electronic spark control is responsible for an important ignition process that requires precision and direct compatibility, which is offered by OEM parts.

Aftermarket ESC parts may be cheaper and would suffice, but it's best to go with your manufacturer’s recommendation for the best performance.

Where can I buy parts for my electronic spark control replacement?

Electronic spark control replacement kits and parts may be purchased at dealerships, auto body shops, and auto parts shops like AutoZone, Advance Auto Parts, and O'Reilly Auto Parts. You can also find kits on Amazon or RockAuto. Your vehicle’s owner manual will outline replacement specs, which you can use to find the correct parts.

Find out what parts are recommended for my car

Where can I get my electronic spark control replaced?

If you don’t have a trusted mechanic, you may be unsure about where to take your vehicle for an electronic spark control replacement. Luckily,

Jerry's GarageGuard™

can help you find the right shop by comparing costs from over 2,500 vetted repair shops in the US.

Jerry's GarageGuard™ compares fair price estimates* from each shop using their real hourly labor rate. With Jerry's GarageGuard™, you can find out about diagnostic fees (and if they’re included in the service cost), and you’ll have access to real reviews to help you choose the best automotive service.

Check out some of our vetted shops below and download the app to compare car repair quotes in your area.

110 Reviews

T.J.A. Auto Care

161 Ridge Rd, Lyndhurst, NJ

Electronic Spark Control Replacement Cost

Fair Cost Estimate for This Shop

$92

(Parts - $63, Labor - $29)

Shop Diagnostic Fee

(Included in service charges)

$129.95

Compare this shop for free with Jerry (201) 935-2208

139 Reviews

AAMCO Transmissions & Total Car Care - Jersey City

1742 John F. Kennedy Blvd,, Jersey City, NY

Electronic Spark Control Replacement Cost

Fair Cost Estimate for This Shop

$95

(Parts - $63, Labor - $32)

Shop Diagnostic Fee

(Included in service charges)

$69.95

Compare this shop for free with Jerry (201) 885-4543

176 Reviews

Portland Automotive Inc

131 Marlborough St, Hartford, CT

Electronic Spark Control Replacement Cost

Fair Cost Estimate for This Shop

$99

(Parts - $63, Labor - $36)

Shop Diagnostic Fee

(Included in service charges)

$159.95

Compare this shop for free with Jerry (860) 342-0640

115 Reviews

Elite Auto Repair & Service Inc #2

5655 E Colonial Dr, Orlando, FL

Electronic Spark Control Replacement Cost

Fair Cost Estimate for This Shop

$93

(Parts - $63, Labor - $30)

Shop Diagnostic Fee

(Included in service charges)

$120

Compare this shop for free with Jerry (407) 228-3285

How did we vet these shops?
Jerry experts researched 2500+ real repair shops across the US. We talked to real shop customers, and analyzed both real shop pricing data and thousands of real customer reviews from each shop to verify them individually. We do not partner with the shops listed above, and our analysis is always unbiased.

How will a mechanic replace my electronic spark control?

The replacement process for a new electronic spark control is fairly straightforward, so it shouldn’t take your mechanic long to complete the job. If your car has a bad electronic spark control, your mechanic will run a diagnostic test and then follow these steps to complete the replacement:

Preparation: With the vehicle off, your mechanic will collect the tools required for the ESC replacement and locate the module in the engine bay. Once the ESC module is marked, the mechanic will disconnect your battery to ensure a safe procedure. If there are other electrical connections that require disconnection for an ESC module replacement, the mechanic will also unplug them before removing the module.

Removing mounting hardware: Before the old ESC module is taken out, your mechanic will need to remove the securing bolts, screws, or clips that hold the ESC in place.

Removing the old ESC module: Your mechanic will unplug the electronic spark control connector and remove it from its mounting position.

Installing the new ESC module: Based on the position of the old ESC module, the mechanic will install the new ESC module and reconnect the electrical connector.

Reconnecting electrical components: Any electrical connections that were unplugged for the purpose of the ESC replacement will be reconnected. This includes your car battery.

Testing: Once the new ESC module is installed, your mechanic will test the ignition system for correct functioning. They may use an OBD-II scanner to check for any trouble codes associated with the ESC module and the engine control module.

What happens if I don’t replace my electronic spark control?

Your electronic spark control is vital to the optimal performance of your ignition system. If you notice any issues with your ESC module, you should have it inspected and replaced immediately to avoid the following issues:

Irregular ignition timing

Engine damage

Ignition system damage

Engine misfires

Rough idling

Decreased fuel efficiency and lower fuel economy

Reduced power

Higher emissions

Vehicle won’t start

What is an electronic spark control?

The electronic spark control module—commonly known as the ignition module or ESC module—works with your car’s computer, distributor, and spark plugs to time the ignition system for optimal efficiency and performance. Its primary function is to speed up or slow down the timing, depending on current operating conditions.

When your engine is working hard or under a heavy load, the ESC module will accelerate the timing, providing the necessary extra power. When the engine is not working quite so hard—i.e., at low throttle or while cruising at a consistent speed—the module will slow down the timing to preserve energy and boost efficiency.

When should I replace the electronic spark control on my car?

The most common symptoms of a bad timing belt include:

Poor engine performance: The ESC module aids with optimizing performance by adjusting the ignition timing based on engine cues. A bad ESC module may result in engine misfires, irregular ignition timing, and rough idling.

Poor fuel efficiency: If your ESC module is damaged, your vehicle will consume more fuel and your fuel economy will be reduced.

Higher emissions: Your vehicle could potentially fail an emissions test if your ESC module is faulty. A bad ESC module can cause your engine to misfire, which raises emissions.

Difficulty starting: A malfunctioning ESC module may cause your engine to stall or not start.

Check engine light: You may notice your check engine light illuminated if your ESC module is damaged. You or your mechanic can use an OBD-II scanner to detect diagnostic trouble codes related to the ignition system.

Potential engine damage: If the ESC module malfunctions and affects your car’s ignition timing, it may create harmful combustion conditions that can damage your engine over time.

Keep in mind: These symptoms may vary depending on your vehicle and its engine type. It's always best to check your owner’s manual or ask a qualified mechanic to assess the condition of your electronic spark control module.

How often should an electronic spark control be replaced?

The electronic spark control module is fairly durable and there isn’t a specific replacement interval suggested by vehicle manufacturers. While the ESC module does not require timed replacements, it's a good idea to regularly inspect this part for damage or failure.

Can I replace my electronic spark control myself?

Electronic spark control replacements are very simple, so you may be able to do the job on your own depending on your vehicle. If you aren’t used to DIY auto repairs, you should take your vehicle to a certified mechanic to ensure your new electronic spark control is correctly installed.

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FAQs

What are the symptoms of a bad electronic spark control module?

Symptoms of a bad electronic spark control module include:

Poor engine performance

Lower fuel efficiency

Higher emissions

Difficulty starting

Check engine light

Irregular ignition timing

How much does it cost to replace a spark module?

On average, it costs $201 to replace an electronic spark control module. Your electronic spark control module or ignition control module replacement costs will vary depending on your vehicle’s make and mode.

What are the symptoms of a bad ICM?

A bad ignition control module—or electronic spark control module—can result in the following symptoms:

Engine misfires

Irregular ignition timing

Rough idling

Rough acceleration

Engine stalling

What does an electronic spark control module do?

The electronic spark control module—also known as the ignition module or ESC module—speeds up or slows down the ignition timing, depending on current engine conditions and computer cues. The module slows acceleration timing when the engine is working hard, or slows down when the engine is under low stress.

Meet Our Experts

John Davis

Car Expert

Certified mechanic with 10+ years of experience

John Davis is an expert automotive writer and former automotive mechanic. John's work spans multiple categories, and he relishes the opportunity to research a new subject and expand his area of expertise and industry knowledge. To date, John has written more than 200 articles covering car maintenance and care, car advice, how-to guides, and more.

Prior to joining Jerry’s editorial team, John worked as a mechanic and freelance writer, creating content for clients including HotCars and SetPower.

Jessica Barrett

Car Expert

Jessica Barrett is a senior insurance writer and editor with 10 years of experience in the automotive and travel industries. A specialist in car insurance, car loans, and car ownership, Jessica’s mission is to create comprehensive content that car owners can use to manage their costs and improve their lives. As a managing editor for a team of writers and insurance specialists, Jessica has edited over 2,000 articles for Jerry on topics ranging from local insurance shopping tips to refinancing car loans with bad credit.

Before joining Jerry as a senior content editor in 2021, Jessica created visual content for clients such as Expedia, Vivid Seats, Budget Direct Car Insurance, Angie’s List, and HomeAdvisor. Her content was published in Business Insider, Forbes, Apartment Therapy, and the BBC.

Kathleen Flear

Car Expert

Kathleen Flear is an expert insurance writer and editor who heads up Jerry’s editorial team as director of content. Kathleen empowers drivers to make smart car ownership decisions through best-in-class articles on insurance, loans, and maintenance. Prior to joining Jerry in 2021, Kathleen served as managing editor for a team of SEO content marketing professionals at Article-Writing.co and worked as a freelance writer and editor for a range of digital publications, including Chicago Literati magazine and Golden Words. She earned a bachelor’s degree in English language and literature from Queen’s University, and a master’s degree in creative writing and fiction from Sierra Nevada University.

*The price information provided on our car repair webpages is intended for general informational purposes only. Actual prices for car repair services may vary based on various factors, including but not limited to the make and model of your vehicle, the extent of repair required, and the prevailing market conditions. All prices for real repair shops are estimations based on our research only. Therefore, the prices listed on our webpages should not be considered as final quotes or binding offers.