Alternator Replacement Cost: How Much Does an Alternator Cost?
Reviewed by Eric Shepherd, ASE-Certified Technician (and Gemba’s Accidental Social Media Star!)
If your mechanic told you that your vehicle needs a new alternator, there’s probably one question running through your mind: How much is this going to cost?
According to RepairPal, the national average lands somewhere between $809 and $1,088 for parts and labor while Kelley Blue Book puts its average at $747 to $842, but that range varies significantly by vehicle.
The actual alternator is only part of the equation when it comes to cost. Other variables include the vehicle design, alternator output, whether the part is new or remanufactured and, of course, the amount of labor required to actually reach and replace the alternator.
Before you sign a blank check to have it fixed, there’s another question to consider: Is the alternator actually the problem?
As Eric Shepherd, ASE-Certified Technician at Gemba Automotive, explains:
“We get this question all the time. However, because ‘alternator’ symptoms could be simple cable or battery faults, I would much prefer a visit to the shop for a proper system inspection before adding possible unneeded costs stress to your already stressful situation.”
How Much Does Alternator Replacement Cost?
Different vehicles come with different service costs. The national average lands somewhere between $809 and $1,088 for parts and labor, according to RepairPal while Kelley Blue Book puts its average at $747 to $842, but that range varies significantly by vehicle. The current national average provides a useful starting point but the actual alternator replacement cost for your vehicle depends on what you drive and what’s necessary to install the replacement part.
Once you get your estimate, it’s important to remember that it may be vastly different than someone with a completely different vehicle.
What Determines Alternator Replacement Cost?
Vehicle Make and Model
If you open the hood on two vehicles, you might notice that the alternator could be in two very different locations, despite the fact that they perform essentially the same basic job. For example, one might be sitting high in the engine bay with direct access while the other could be hidden underneath other components that would need to be removed or repositioned before a technician can get to it. The location matters when it comes to paying for labor.
“Every make and model will have different labor times due to their unique design,” Shepherd said. “Some vehicles that share the same under-hood specifications can have similar labor costs, but then the part costs may be entirely different.”
Alternator Type and Output
Alternators aren’t interchangeable devices that can fit all different engine sizes. Vehicles have different electrical components, power requirements and charging-system designs. The correct alternator must meet the vehicle’s specifications. Higher-output alternators typically cost more than lower-output options.
So, when it comes to answering “how much is an alternator?” it starts with which alternator your vehicle requires.
New vs. Remanufactured Alternators
Depending on the application, your alternator replacement options could include new, remanufactured, OEM and aftermarket parts. A remanufactured alternator has been disassembled, inspected and rebuilt rather than created from all new components. It can offer a different price point than a new unit while OEM and aftermarket options can also impact the cost.
It is important to know that the cheapest or most expensive option isn’t automatically the best option. You should compare the correct application, part quality and the warranty coverage if there is any.
Labor
Labor is where two similar alternator jobs can produce suddenly drastic and very different estimates. Vehicles with difficult access to the alternator can require other parts to be removed before the alternator can be replaced. The more a vehicle needs to be disassembled, the more it will cost in labor time, in addition to the time it takes to complete the job.
Alternator Parts Cost vs. Labor Cost
The alternator labor cost can be a small part of the total repair bill on one vehicle and a substantial part of the bill on another. That’s why looking at only the price of the alternator online can be deceiving and doesn’t really give you an accurate idea of how much the repair should cost.
The repair shop you take your vehicle to also has to diagnose the problem, access the alternator, remove it, install the new part and then verify that the alternator and charging system are working as they should once the install is finished.
Alternator Repair Cost vs. Replacement Cost
Sometimes people search for “alternator repair cost,” when what they really need is the cost to have the alternator problem fixed. In many repair situations, the alternator assembly isn’t being repaired but replaced. That said, the right repair depends on the vehicle, the alternator and why the problem occurred in the first place.
When you receive your estimate, it should make it clear what is actually being replaced and what parts are being used.
How Long Does It Take to Replace an Alternator?
Because different vehicles have different designs, there isn’t a universal labor time. The time will depend on the alternator location, vehicle design, belt configuration, components that need to be removed and if there are any additional battery or charging system problems that need attention.
An accessible alternator might be a relatively straightforward job, but one that is buried deep in the engine bay can make the same task significantly more complicated. The difference in labor estimates shouldn’t be compared on part price alone.
What Are the Signs You May Need an Alternator?
Several warning signs may indicate an alternator or charging-system problem, although these symptoms do not necessarily mean the alternator needs replacement. The signs can include a battery or charging-system warning light, repeated dead batteries, dim or flickering lights, abnormal electrical accessory behavior, trouble starting or stalling after the engine starts.
None of those symptoms automatically means the alternator is bad. You need to consider the battery condition, loose or damaged connections, wiring faults, belt problems, and other electrical issues that can create similar issues. That’s why testing and diagnosing is so important.
Bad Alternator or Bad Battery?
The battery and the alternator work together but do two different jobs. The battery stores electrical energy, including the power needed to start the vehicle while the charging system replenishes the battery and supplies the electric power needed while the vehicle is operating.
A dead battery doesn’t automatically mean that you have a bad battery, or a bad alternator. At Gemba Automotive, Shepherd says the culprit is often something much simpler. “In my experience, about 75% of the time it's a loose battery cable or battery that's worn out. This is a quick and easy test where I first check that the cables are firmly in place on the battery terminals.”
Shepherd said the next step is to perform a load test on the battery. “If those tests are good, I then check the output voltage of the alternator. Usually, when the alternator fails to provide the specified range of voltage for that vehicle, it will trigger the battery light to illuminate on the dash. A common misconception we see is that a lot of drivers believe the battery light means they have a bad battery, so they DIY a battery replacement and then come to see us because the light is still on.”
Can You Drive with a Bad Alternator?
You might be able to drive with a bad alternator, but you probably won’t get very far. A failing charging system can leave your vehicle unable to continue running or unable to start.
There isn’t a reliable “you can drive X miles” rule, and how long the vehicle continues to run and drive depends on the battery charge, electrical demand, and the severity of the failure and the vehicle’s charging-system behavior. If the warning light appears halfway down the Loop 202 or SR-51, you shouldn’t turn it into a game of how far you can get before it dies completely.
Is It Worth Replacing an Alternator?
If your vehicle is in good condition otherwise, the alternator replacement is generally a pretty normal repair and not an automatic reason to retire the car and get a new one. In these situations, the bigger picture matters. Consider the vehicle’s overall condition, mileage, value, other repairs it might need and how long you plan to keep it in addition to the actual alternator replacement cost. Put it this way: A $900 repair looks very different on a well-maintained daily driver you plan to keep for the next five years than it does on a vehicle with several other major repairs already lined up.
Is Alternator Replacement a Big Job?
The alternator replacement can be a big job depending on where it is located. On other vehicles, it might be super easy to access. When comparing costs, keep in mind that different vehicles have different parts and will result in a different job.
How Is a Bad Alternator Diagnosed?
Before replacing the alternator the battery and the charging system should be tested. A technician will inspect the battery condition and connections, test the battery, check the charging system output and examine the wiring, grounds, belts and other relevant components.
The important part to remember is that a dead battery alone doesn’t mean the alternator has gone bad as well.
How Long Do Alternators Last?
Like many parts on a vehicle, there isn’t a magic mileage number when the alternator will go bad. Rather, it depends on the vehicle, the design of the alternator, electrical needs, driving environment, charging system health and the condition of other related components.
One alternator might last for many years while another vehicle will need a replacement more often.
Does Arizona Heat Affect Alternators?
Phoenix is a harsh environment when it comes to anything living under the hood. The extreme ambient temperature combined with under-hood heat and constant demand from AC and cooling systems can create a demanding operating environment for a vehicle and its electrical system. Of course, this doesn’t mean that Arizona heat automatically kills an alternator, but it can mean the charging system is working harder when the summer is doing its best impression of the surface of the sun.
Shepherd explains what that looks like from the shop:
“Certainly, when our summer ambient temperatures climb to 115 degrees or more, those under-hood temperatures range from anywhere from 140 to 160 degrees or more. The Valley heat demands maximum electrical performance continuously due to heavy AC use. When cruising down the 101 without traffic, the alternator is humming along, but when there’s traffic or you’re idling at a light, the engine RPMs are lower and it produces less power.”
Shepherd explains that when you’re idling and your HVAC blower is on blast, your engine cooling fans are also on high, and the AC compressor clutch is engaging on-demand amperage. “Couple this power draw with such heat, and it heavily taxes the electrical system and stresses the alternator’s internal voltage regulator... and those don’t like to entertain our severe heat.”
That’s a very Arizona combination: triple-digit heat, AC on full blast and stop-and-go traffic while the charging system tries to keep everyone happy.
Frequently Asked Questions About Alternator Replacement Cost
How much does an alternator cost?
Alternator prices vary considerably by vehicle, output, manufacturer and whether the unit is new or remanufactured. The part itself is only one component of the total repair cost. The national average lands somewhere between $809 and $1,088 for parts and labor, according to RepairPal while Kelley Blue Book puts its average at $747 to $842, but that range varies significantly by vehicle.
How much is labor for alternator replacement?
Labor depends heavily on vehicle design and alternator accessibility.
How long does alternator replacement take?
There is no universal labor time. Alternator location and any required component removal, vehicle design and additional diagnostic work all affect the job.
What are signs of a bad alternator?
Possible signs include a charging-system warning light, repeated dead batteries, abnormal lighting or electrical behavior, starting problems and stalling. These symptoms can have other causes, so testing is important.
Can you drive with a bad alternator?
A failing charging system can eventually cause the vehicle to stop operating or prevent it from restarting.
How long do alternators last?
Alternator lifespan varies considerably depending on design, electrical load, operating conditions and other factors. There is no mileage at which every alternator should automatically be replaced.
Is it worth replacing an alternator?
Often, yes. An alternator is a normal vehicle repair. Whether the repair makes sense for a particular vehicle depends on its overall condition, value, other needed repairs and your ownership plans.
Before You Pay for an Alternator, Make Sure You Need One
Nobody wants to spend hundreds of dollars replacing an alternator only to discover the real problem was a battery or loose cable.
If your battery keeps dying, a charging-system warning light is on or your vehicle is having electrical problems, don't assume the alternator is automatically the cause. Gemba Automotive can test the battery and charging system to identify the problem before recommending replacement.