Crankshaft sensor replacement typically costs between $150 and $400 for parts and labor combined, though the range depends on your vehicle's make, model, and engine type

The crankshaft position sensor tells your engine's computer where the crankshaft is in its rotation cycle. When it fails, your car may not start, may stall while driving, or may run rough. Replacement is not optional — a failed sensor will eventually leave you stranded.

The sensor itself usually costs $40 to $150 new, depending on whether you buy OEM (original equipment manufacturer) or aftermarket. Labor runs $100 to $300 at a shop, because the sensor sits in different places on different engines — some are straightforward to reach, others require removing engine covers or other components. A few vehicles have two crankshaft sensors, which doubles the parts cost.

Dealerships charge more than independent shops for the same work. A dealership might bill $250 to $400 total; an independent mechanic might charge $150 to $250. The difference is usually labor rate, not the part itself.

Key Takeaways

  • Parts cost $40 to $150; labor adds $100 to $300, so total replacement runs $150 to $400 at most shops.
  • Location of the sensor on your engine determines how long the job takes — some vehicles require removing covers or other parts first.
  • Dealerships typically charge 30 to 50 percent more than independent mechanics for the same replacement.
  • Aftermarket sensors cost less than OEM but carry shorter warranties; compare warranty length, not just price.
  • Ignoring a failed sensor risks engine stalling while driving and may trigger additional damage to the ignition system.

Where the sensor sits and why location matters

The crankshaft sensor bolts to the engine block near the crankshaft, but the exact location varies widely. On some engines it sits in an straightforward-to-reach spot near the front; on others it hides behind the timing cover, harmonic balancer, or even inside the bell housing between the engine and transmission.

When the sensor is accessible, a mechanic can swap it in 30 to 60 minutes. When it requires removing other components first, the job stretches to two or three hours. This is why two identical cars from different model years can have vastly different labor costs — the engine design changed, and the sensor moved.

Before you get a quote, ask the shop whether the sensor on your vehicle is a quick swap or a deep-engine job. If they say it requires removing the timing cover or transmission, expect labor to be at the higher end of the range.

OEM versus aftermarket sensors and warranty differences

An OEM sensor comes from the vehicle manufacturer and carries a warranty that usually matches your car's powertrain warranty — often three years or 36,000 miles. An aftermarket sensor from a supplier like Bosch, Standard Motor Products, or Delphi typically costs $20 to $40 less but may carry only a one-year or 12,000-mile warranty.

Aftermarket sensors are usually reliable, and many shops stand behind them with their own labor warranty — meaning if the sensor fails within 30 or 60 days, they will replace it free. Ask whether the shop offers this before you choose the cheaper part.

Some vehicles have sensors that fail more often than others. If your model is known for sensor problems, the extra cost of an OEM part with a longer warranty may save you money over time. Your mechanic can tell you whether your vehicle falls into that category.

Dealership pricing versus independent shop pricing

Dealerships charge a higher labor rate per hour — often $120 to $180 per hour versus $80 to $120 at an independent shop. On a one-hour job, that difference is $40 to $100. On a three-hour job, it can be $120 to $300.

Dealerships also typically charge more for the part itself, sometimes 20 to 40 percent above what an independent shop pays. However, dealerships often have the sensor in stock and can order it faster if they do not, and they have detailed factory service manuals for your exact vehicle.

If your car is still under warranty, check whether the repair is covered before you pay anything. Some warranties cover sensor replacement; others do not. A dealership can tell you when ready; an independent shop may need to call the manufacturer to confirm.

What happens if you delay replacing a failed sensor

A crankshaft sensor that is failing but not completely dead will cause your check engine light to come on. At this stage, the car usually still runs, though it may hesitate, stall at stops, or be hard to start. This is the ideal time to replace it — before you are stuck on the side of the road.

If you ignore the warning light, the sensor will eventually fail completely. When it does, the engine will not start at all, or it will start and when ready stall. You will need a tow to a shop, which costs $75 to $150 depending on distance. That tow fee is money you would not have spent if you had replaced the sensor when the light first appeared.

A completely failed sensor can also cause the ignition coil to work harder than it should, potentially shortening its life. If the coil fails as a result, you are looking at another $150 to $300 repair on top of the sensor replacement.

Symptoms that point to a crankshaft sensor problem

The check engine light is the most reliable sign. When you see it, have the code read at a shop or with a code reader you can borrow or buy for $25 to $50. Codes P0335, P0336, P0337, P0338, or P0339 all point to the crankshaft sensor or its wiring.

Other symptoms include hard starting (the engine cranks but takes longer than usual to fire), stalling while driving or at a stop, rough idle, or a sudden loss of power while accelerating. Some vehicles also show these symptoms when the wiring to the sensor is corroded or loose, so a mechanic will check the connector and wires before replacing the sensor itself.

If you have multiple symptoms but no check engine light, the problem might be something else — a fuel pump, ignition coil, or battery issue can cause similar behavior. This is why a code read is worth the small cost before you authorize any repair.

How to get an accurate quote before you commit

Call three shops — one dealership and two independent mechanics — and give them your vehicle's year, make, model, and engine size. Ask for a quote that includes the part cost, labor cost, and any diagnostic fee. Most shops charge $50 to $100 to read the code and confirm the sensor is the problem; some waive this fee if you authorize the repair.

Ask each shop whether they use OEM or aftermarket parts and what warranty comes with the repair. Ask how long the job will take and whether your car will be ready the same day. If one quote is significantly lower than the others, ask why — it might be a loss leader, or the shop might be using a very cheap aftermarket part with no warranty.

Once you choose a shop, ask them to call you before they start work if they find anything else that needs repair. A failed sensor sometimes sits next to a corroded connector or damaged wiring, and a good shop will flag this before they bill you for extra work you did not authorize.

Frequently Asked Questions

Can I replace the crankshaft sensor myself?

If the sensor is in an straightforward-to-reach location, yes — you can buy the part for $40 to $150 and swap it yourself in 30 minutes to an hour. You will need basic hand tools and the ability to disconnect an electrical connector. If the sensor is buried deep in the engine, the job requires removing other components and is not a beginner task. Check a repair manual for your vehicle before you decide.

Will a failed crankshaft sensor damage my engine?

No, the sensor itself does not damage the engine. However, a failed sensor can cause the ignition coil to work harder and fail prematurely, and it can cause you to stall in traffic, which is dangerous. Replace it as soon as the check engine light appears.

How long does a crankshaft sensor last?

Most sensors last 80,000 to 150,000 miles, though some fail earlier and others last the life of the vehicle. Sensors exposed to extreme heat or moisture tend to fail sooner. There is no maintenance that prevents failure — when they go bad, they need replacement.

Is the crankshaft sensor the same as the camshaft sensor?

No, they are different sensors in different locations. The crankshaft sensor tracks the crankshaft; the camshaft sensor tracks the camshaft. Both can fail independently, and both will trigger a check engine light. A code read will tell you which one is bad.

What if the check engine light comes back after replacement?

A light that returns when ready usually means the new sensor is defective, the wiring is still damaged, or the connector was not seated properly. Return to the shop that did the work — they should re-diagnose and fix it under warranty at no charge.