Diagnostic Fees at the Dealership: Everything You Need To Know


in Car Buying Tips
Car dealership

Source: Pixabay

When your vehicle runs into a maintenance problem, your first instinct is to get it checked. You could go to your neighborhood mechanic or big box realtor for a free or cheap diagnostic check, but their computer system may not pick everything up accurately. The Diagnostic fee at a dealership might be a bit higher, but worth it in the long run, since dealership equipment is designed to pick up vehicle failures specifically.

Going to a dealership gives drivers the advantage of having a system knowledgeable about the vehicle’s make and model, as well as common failures, up-to-date recalls, and customer complaints. How much can a diagnostic fee at a dealership cost? 

What is a Diagnostic Test?

Car diagnostic checks are a relatively routine method to check for vehicle problems using computer detection. This is a phrase used in the auto industry to describe the testing necessary to establish the unknown or underlying cause of a car problem. A check engine light may necessitate using complex computer equipment, component examination, testing, or other procedures to find a vehicle’s fault. These diagnostic services are designed to provide specific codes that can be used to estimate vehicle repair costs, time, and repairs.

A diagnostic test will ideally let the technician know how long the problem has been present in real-time and how often this mistake has likely happened during that period. It essentially looks for specific error codes and analyzes the vehicle’s system. This is crucial in determining whether there’s a one-time problem or a chronic issue that needs more attention.

It can vary quite a bit, but just like everything else vehicle-related, you should always get a quote before you pay the diagnostic fee at a dealership. Many offer free inspections as a complimentary service. Moving to a diagnostic service may be a good option if the issues are still hard to identify.

Before the free multi-point check, inform your service consultant of any known issues with your vehicle. You may have to pay for extra time if they can’t locate your problem during the free multi-point examination, but you didn’t lose any money trying to share as much information as possible.

If it’s something common, like a noise issue, it might take multiple tests and inspections to determine what’s wrong. Most dealerships provide complimentary multi-point checks. They aren’t as exhaustive as a diagnostic, but they should suffice to get you a starting point. They aim to identify and sell you the repair if you already know you have an issue that needs to be fixed. It’s in their best interest to inspect your car and locate anything that needs to be repaired since they make money by repairing vehicles.


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Understanding the Diagnostic Process at a Dealership

The diagnostic process typically involves several steps designed to gather specific information about your vehicle’s performance and potential problems.

First, the technician will connect your vehicle to a specialized diagnostic computer. This computer will read and interpret the error codes generated by your vehicle’s onboard diagnostic system (OBD). These codes provide a starting point for the technician, indicating which systems or components may be malfunctioning.

However, the error codes alone do not provide a complete picture of the problem. The technician must then use their expertise and additional tools to investigate the issue further. This may involve visual inspections, test drives, and specialized equipment to measure your vehicle’s performance, such as fuel pressure, electrical voltage, or compression.

The technician will systematically rule out potential causes throughout the diagnostic process until they identify the root problem. This process can be time-consuming, especially for intermittent or complex issues, so diagnostic fees are typically based on the time spent rather than a flat rate.

Once the technician has identified the problem, they will provide you with a detailed explanation of the issue and a recommendation for repairs. They may also offer insight into the urgency of the repairs and the potential consequences of delaying them.

Why Does A Diagnostic Fee At A Dealership Vary?

  • Costs of labor and benefits in the area like a rural or urban location
  • Serviced vehicle brands and models like a mainstream sedans compared to an exotic
  • Type of repair shop like an independent or sponsored dealership
  • Overhead costs at the facility, like mortgage or rent, upkeep, and utilities
  • Overhead costs in the workplace for tools, auto repair technician training, equipment, advertising, and even taxes
  • The cost to maintain auto repair experts’ skill levels and certifications

Some customers may need help comprehending why a cost is charged for just diagnosing an issue, especially for problems that appear to be simple or fast cures. A diagnostic check ensures that the dealership and mechanic will be compensated for time spent on the service if the customer decides not to get the repair done. There are a variety of set diagnostic prices to choose from. It’s not uncommon for shops to charge between $50 and $150 for the equivalent of half or a full hour of labor.

Most Expensive Diagnostic Fee At A Dealership By Brand

Unlike the cost of an oil change or a simple tire rotation, a diagnostic fee at a dealership can vary quite a bit. Take the most expensive brands to maintain according to Endurance, and you’ll find the most costly are mostly luxury brands or have several models no longer in production. 

  1. BMW
  2. Mercedes-Benz
  3. Cadillac
  4. Volvo
  5. Audi
  6. Saturn
  7. Mercury
  8. Pontiac
  9. Chrysler
  10. Dodge

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In general, a diagnostic fee at a dealership will cost around $100 before taxes but can range as far as $50 to $500 depending on the brand, location, type of car, and significance of the problem. The cost is hard to avoid if you want to know what may be wrong with your vehicle and how to fix it.

As with any financial decision, it’s wise to check at least a dealership or other repair shops to get a quote. This can be done by checking reviews, emailing, or calling the store. Since several auto repair shops will offer free car diagnostic tests, it is worth asking what the car diagnostic costs are first.

Auto repair costs vary significantly throughout the country and even within the same location. The AAA Approved Auto Repair network’s auto repair shops charge between $47 and $215 per hour, and the type of vehicle and your location will likely be a significant factor in this range. 


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An introductory diagnostic price that covers specific procedures and a maximum time restriction is quoted by shops. If the problem cannot be discovered within that time frame, they will likely call you, explain what has been done so far, and request extra time and money to complete the diagnosis. Hopefully, this isn’t the case, but this is hard to avoid when working on intricate repair problems. It is relatively uncommon for the diagnosis cost to surpass the actual repair cost for some issues, particularly electrical difficulties.

Overall, a dealership’s diagnostic fee can help prevent major repair problems and give greater insight into fixing a vehicle. It shouldn’t cost a fortune, but you should be prepared to pay at least a few hundred dollars before additional repair costs.

Is it Worth It to Pay for Diagnostic Fees?

In short, yes.

Many customers balk at the idea of paying diagnostic fees, especially when they are expensive. While some people are quite adept at diagnosing mechanical issues, it’s a fact that most people don’t know what they’re doing. Some folks think it’s as simple as reading the error codes to determine the issue and go straight to the repair process. As outlined above, mechanical diagnosis is not as simple as many think.

In reality, error codes require several steps to ensure proper diagnosis and repair. Otherwise, you risk misdiagnosing the problem or, worse, damaging some components beyond repair. Knowing which steps to take and executing them properly is why you’re paying a mechanic in diagnostic fees.

In other words, modern diagnostic equipment and the training required to properly use/interpret them cost money. In any part of auto repair, diagnosing the problem correctly is crucial and “high value.” Like the cost of any high-quality goods or services, the experts (in this case, the mechanics) who are performing the accurate diagnosis must be appropriately compensated.



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