Mazda CX-7 Front Crankshaft Seal Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(279)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(279)

Front Crankshaft Seal Replacement Service

How much does a Front Crankshaft Seal Replacement cost?

On average, the cost for a Mazda CX-7 Front Crankshaft Seal Replacement is $554 with $22 for parts and $532 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2007 Mazda CX-7L4-2.3L TurboService typeFront Crankshaft Seal ReplacementEstimate$740.28Shop/Dealer Price$777.72 - $856.02
2010 Mazda CX-7L4-2.5LService typeFront Crankshaft Seal ReplacementEstimate$654.66Shop/Dealer Price$686.60 - $766.76
2012 Mazda CX-7L4-2.5LService typeFront Crankshaft Seal ReplacementEstimate$598.82Shop/Dealer Price$616.90 - $655.25
2011 Mazda CX-7L4-2.3L TurboService typeFront Crankshaft Seal ReplacementEstimate$811.78Shop/Dealer Price$869.23 - $1024.05
2008 Mazda CX-7L4-2.3L TurboService typeFront Crankshaft Seal ReplacementEstimate$702.44Shop/Dealer Price$738.75 - $816.20
2011 Mazda CX-7L4-2.5LService typeFront Crankshaft Seal ReplacementEstimate$654.66Shop/Dealer Price$687.23 - $767.85
2010 Mazda CX-7L4-2.3L TurboService typeFront Crankshaft Seal ReplacementEstimate$811.78Shop/Dealer Price$869.30 - $1024.17
2009 Mazda CX-7L4-2.3L TurboService typeFront Crankshaft Seal ReplacementEstimate$702.44Shop/Dealer Price$732.56 - $805.37
Show example Mazda CX-7 Front Crankshaft Seal Replacement prices

What is the Front Crankshaft Seal all about?

A number of mechanisms must work together to make your vehicle move forward. One of the most important is the crankshaft, which converts rotary into linear motion; i.e., it transforms the force created by the engine's pistons moving up and down into a force that moves in a circular motion that causes a car’s wheel to turn. Enclosed in what’s called a crankcase—the largest cavity in the engine block, just below the cylinders—the crankshaft must be completely lubricated, essentially submerged in oil, to spin nearly friction-free and do its job properly.

Consequently, there are seals located at either end of the crankshaft that allow it to spin freely and keep engine oil from escaping the engine block, as well as prevent contaminants and other debris from entering and causing damage to the mechanism. Since there are two ends of the crankshaft, there are two types of seals: the front crankshaft seal and the rear crankshaft seal, also known as the front main and rear main seals.

Keep in mind:

  • Loss of oil will eventually cause serious internal engine damage.
  • Inspect the sealing surface of the crankshaft or the crankshaft pulley (depending on the engine design) for damage when replacing the crankshaft seal.
  • Oil degrades rubber components.

How it's done:

  • The vehicle is raised and supported on jack stands
  • The crankshaft damper and timing belt is removed
  • The crankshaft seal is removed and a new one installed
  • The timing belt and cover along with crankshaft damper is reinstalled
  • The engine accessory belts are installed and the vehicle is lowered off of the jack stands

Our recommendation:

One of the most important parts of your car, crankshaft seals are typically made from a durable material, such as a synthetic rubber or silicone, designed to handle the extreme pressure and temperatures as well as the caustic chemicals in your engine oil. Because they are exposed to such abuse, main seals are subject to a lot of wear and tear. And whether you are talking a front or rear main seal, replacement is the only cure when one malfunctions.

The good news is that the seals are relatively inexpensive components. The bad news is that neither is easy to replace.

Front seal: The front seal is located behind the main pulley that drives all the belts, which is, of course, always spinning. The main pulley throws any leaking oil out in a big circle. It can get thrown up on the alternator, steering pump, belts, in short anything attached to the front of the engine and cause a real mess and eventually some serious damage. Consequently, it has to be removed along with many of the components attached to the front of the block to replace the front main seal.

Rear seal: The rear crankshaft seal is placed along with the transmission; therefore, the process of replacing it requires the removal of transmission, as well as the clutch and flywheel assembly. This is a very involved job.

What common symptoms indicate you may need to replace the Front Crankshaft Seal?

  • Oil leaking from the front crank pulley.
  • Oil dripping from the bottom of the clutch housing, where the block and transmission meet.
  • Clutch slip caused by oil spraying on the clutch.

How important is this service?

Letting either crankshaft seal continue to leak can be detrimental to your vehicle’s continued operation. Besides the maladies caused by driving around with little to no oil flowing in the engine, the faulty seal will be spread oil through the engine bay and undercarriage of your car as you drive, a mess that is difficult to clean up and can be a fire hazard. Replacing is better addressed sooner than later.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mazda mechanics

Real customer reviews from Mazda owners like you.

Excellent Rating

(279)

Rating Summary
261
7
2
2
7
261
7
2
2
7

Tom

45 years of experience
38 reviews
Tom
45 years of experience
Mazda CX-7 L4-2.5L - Brake Pads Replacement (Front) - Round Rock, Texas
On time - kept in contact- was thorough and got my car fixed in record time- gave us videos and reports on our 50 point check up Would use and recommend him again! He also found that we had a screw in our tire- so helpful to know!

Justin

9 years of experience
372 reviews
Justin
9 years of experience
Mazda CX-7 L4-2.5L - Transmission Fluid Service - Delray Beach, Florida
I have used Justin before and I have been pleased (I even referred a new customer). This time however I had an issue. I was told my serpentine belt was cracked and needed to be replaced along with some other things. I remembered I had just had my serpentine belt replaced less than a year ago at Jiffy Lube. I was concerned. That weekend I went to Jiffy Lube and they pulled out the serpentine belt in front of me and there are absolutely no cracks. I'm concerned that as a customer who may not have remembered they replaced their belt would have gone ahead and scheduled that service unnecessarily. I just felt this was not really cool and I'm not sure if this is a YourMechanic technique or the technician. Either way, I'm displeased with this upsell.

Patrick

34 years of experience
1579 reviews
Patrick
34 years of experience
Mazda CX-7 L4-2.5L - 67,500 Miles Maintenance Service - Austin, Texas
Very satisfied with the service. He texted me earlier if I wanted to get attended before the scheduled time which was good with me. He finished fast and gave me good advice on what should be further reviewed with the car. Definitely booking him again for my other cars.

Oliver

14 years of experience
35 reviews
Oliver
14 years of experience
Mazda CX-7 L4-2.3L Turbo - Brake Pads Replacement (Front, Rear) - Virginia Beach, Virginia
Amazing technician. Provided updates throughout the process. A truely good guy.

Excellent Rating

(279)

Rating Summary
261
7
2
2
7
261
7
2
2
7
Number of Mazda CX-7 services completed
3069+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mazda MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Buy a Personalized License Plate in Arizona
Arizona personalized license plates cost $50. Buy an Arizona vanity plate online and remember to put car registration stickers on once it's installed.
Windshield Laws in Pennsylvania
Pennsylvania Pennsylvania has a variety of traffic laws that drivers are required to follow on the roadways. However, in addition to the road rules, motorists must also make sure their vehicles are in compliance with the following windshield laws when...
Veteran and Military Driver Laws and Benefits in Kentucky
The The state of Kentucky offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the past, or are current active military members. Disabled veteran registration fee waiver Disabled veterans...

Where is the tpms ecu module located so I can replace?

Hello, thank you for writing in. The TPMS module is located behind the left front wheel well. Beyond the wheel well you will need to locate the first body frame mount, and the module should be fastened to it or...

i need a alternator

Hello, thank you for writing in. You are correct in thinking that your charging system has failed. This is very likely the situation at hand. With that being said, you should still have your battery tested. Typically this is a...

Car Battery completely depleted for no reason

It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com