Engine replacement typically costs between $3,000 and $7,000 for a used engine with labor, or $4,000 to $10,000 for a rebuilt engine, depending on your vehicle make, model year, and local labor rates
The final bill depends on three things: what kind of engine you're putting in, how much your mechanic charges per hour, and whether your vehicle needs additional work once the old engine comes out. A used engine salvaged from a wrecked car costs less upfront but carries unknown mileage and condition. A rebuilt engine—one that's been disassembled, inspected, and reassembled with new or restored parts—costs more but comes with a warranty. A brand-new engine from the manufacturer is the most expensive option and is rarely chosen unless the vehicle is nearly new.
Labor is usually the larger part of the bill. Removing an old engine and installing a new one typically takes 10 to 20 hours depending on engine location, how many components are bolted to it, and whether the transmission needs to come out too. At $100 to $150 per hour (the range varies by region and shop), that alone is $1,000 to $3,000. Add the engine itself, fluids, gaskets, and any parts that fail during removal, and you're looking at a substantial repair.
Key Takeaways
- Used engines from salvage yards cost $500 to $2,000 but may have unknown mileage and no warranty.
- Rebuilt engines cost $1,500 to $4,000 and typically come with a 12-month or 12,000-mile warranty.
- Labor to remove and install an engine usually runs 10 to 20 hours at $100 to $150 per hour, depending on your vehicle and your mechanic's location.
- Additional repairs discovered during removal—failed water pumps, cracked engine mounts, transmission problems—can add $500 to $2,000 to the final cost.
- Getting a written estimate before work begins protects you from surprise charges and lets you compare prices across shops.
How engine type affects the price
A used engine from a salvage yard or online marketplace is the cheapest option. Prices range from $500 to $2,000 depending on the engine's size, how common it is, and the seller's location. The catch: you don't know the real mileage, maintenance history, or whether it will last another 50,000 miles or 5,000. Most salvage yards offer a 30-day to 90-day warranty covering catastrophic failure, but that window is short. If the engine seizes up six months later, you're out the money.
A rebuilt engine costs $1,500 to $4,000 and represents a middle ground. The engine has been taken apart, worn parts replaced or restored, and reassembled to factory specifications. Rebuilt engines typically carry a 12-month or 12,000-mile warranty, sometimes longer. The warranty matters: if something fails within that period, the rebuilder replaces or repairs the engine at no cost. This is the option most mechanics recommend because the risk is lower and you have recourse if something goes wrong.
A new engine from the manufacturer costs $4,000 to $8,000 or more, depending on the vehicle. It comes with a full manufacturer warranty, usually 3 years or 36,000 miles. New engines are rarely chosen for older vehicles because the cost often exceeds the car's value, but they're common for vehicles still under warranty or for owners who plan to keep the car for many more years.
Labor costs vary by location and vehicle design
Mechanic labor rates range from $80 to $150 per hour depending on whether you're at an independent shop, a chain like Firestone or Midas, or a dealership. Dealerships are usually the most expensive; independent shops are often cheaper. Geographic location matters too—labor in urban areas and wealthy suburbs typically costs more than in rural areas.
The number of hours needed depends on engine placement and how many systems are attached. A front-mounted inline engine in a sedan might take 12 to 15 hours to remove and install. A transverse engine in a compact car, or an engine mounted sideways in a minivan, can take 18 to 25 hours because more components have to come out first. Some vehicles require the transmission to be removed along with the engine, which adds 5 to 10 hours. Always ask the shop for a time estimate in writing before they start work.
Some shops charge a flat rate for engine replacement based on the vehicle model—say, $2,500 for a 2010 Honda Civic engine swap. Others charge hourly. Flat-rate shops can be cheaper if the job goes smoothly, but you have less flexibility if unexpected problems arise. Hourly shops give you more transparency about what's taking time, but the bill can grow if complications show up.
Hidden costs that appear during removal
Once the old engine is out, the mechanic often finds problems that weren't visible before. The water pump may be leaking. Engine mounts—the rubber and metal brackets that hold the engine in place—may be cracked or deteriorated. The transmission fluid may be dark and burnt, suggesting the transmission needs service. The radiator hoses may be brittle. These discoveries add $200 to $1,000 or more to the bill.
Some of these repairs are necessary before the new engine can run safely. Others are optional but recommended. A good mechanic will call you before doing extra work and explain why it matters. If you say no to optional repairs, make sure that decision is documented in writing so there's no confusion later about what was included in the estimate.
Fluids and small parts—oil, coolant, new gaskets, belts, hoses—typically add $200 to $500 to the bill. These are usually included in the labor estimate, but confirm that with the shop before work begins.
What to do before committing to engine replacement
Get a diagnostic first. A mechanic can often tell you why the engine failed—overheating, oil starvation, internal damage—and whether replacement is truly necessary. Sometimes a failed head gasket or a cracked block can be repaired for less than full replacement, though the repair may not last as long.
Get a written estimate from at least two shops. The estimate should list the engine type (used, rebuilt, or new), the labor hours, the shop's hourly rate, and any parts beyond the engine itself. This protects you from surprise charges and lets you compare apples to apples. Don't choose based on price alone; a shop that's $500 cheaper but has poor reviews or won't warranty the work is a bad deal.
Ask about warranty. What does the engine warranty cover, for how long, and what does it not cover? Does the shop warranty their labor—meaning if something goes wrong with the installation, they fix it free? A good shop stands behind both the engine and the work.
Consider whether replacement makes financial sense. If your car is worth $3,000 and the engine replacement costs $6,000, you're spending twice the car's value on one repair. In that case, selling the car and buying a different one might be smarter. If the car is worth $10,000 and runs well otherwise, replacement is more reasonable.
Comparing your options side by side
| Engine Type | Parts Cost | Warranty | Risk Level |
|---|---|---|---|
| Used (salvage) | $500–$2,000 | 30–90 days, limited | High—unknown history |
| Rebuilt | $1,500–$4,000 | 12 months/12,000 miles typical | Low—inspected and warranted |
| New (manufacturer) | $4,000–$8,000+ | 3 years/36,000 miles typical | Very low—full warranty |
Labor costs $1,000 to $3,000 across all three options and depends on your vehicle and local rates, not on the engine type. The total bill is the engine cost plus labor plus any additional repairs discovered during removal.
Frequently Asked Questions
Can I buy an engine online and have my mechanic install it?
Yes, most independent mechanics will install an engine you source yourself. However, some shops charge extra for this or won't warranty the installation if the engine fails. Confirm the shop's policy before you buy. Dealerships almost never install customer-supplied parts. Buying online can save money on the engine itself, but make sure the seller offers a return window in case the engine doesn't fit or doesn't run.
How long does an engine replacement take?
The actual work usually takes 3 to 5 business days, though the total time from drop-off to pickup can be longer if the shop is busy or if unexpected problems arise. Ask the shop for a timeline when you drop the car off. Some shops can rush the job for an extra fee, but this isn't always possible.
Is it worth rebuilding my engine instead of replacing it?
Engine rebuilding costs $2,000 to $4,000 in labor plus parts, which is often close to or more than a used engine replacement. Rebuilding makes sense if your engine has sentimental value, if you want to customize it, or if you're keeping the car long-term and want a known-good engine. For most people, a rebuilt replacement engine is simpler and faster.
What's the difference between a rebuilt and a remanufactured engine?
Rebuilt engines are restored by independent shops or local rebuilders to factory specs. Remanufactured engines are rebuilt by the original equipment manufacturer (OEM) or a certified facility to the same standard as a new engine and typically come with a longer warranty. Remanufactured engines cost more but carry less risk. Ask the shop which one they're offering.
Will my check engine light go away after engine replacement?
Usually yes, but not always. If the light was caused by the engine itself (like a misfire), it should clear once the new engine is installed and the system resets. If the light was caused by something else—a bad oxygen sensor, a faulty catalytic converter—that problem remains. The mechanic should scan the code before removal to understand what triggered it.