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  1. Vehicle Heaters
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  4. Cartridge Style
  5. 400 Watts
Kat's Heaters Custom Fit Engine Block Heater - Cartridge Style - 120V - 400 Watts

Kat's Heaters Custom Fit Engine Block Heater - Cartridge Style - 120V - 400 Watts

Item # KH11815
Our Price: $66.94
Vehicle Heaters

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Shipping Weight: 0.7 lbs
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Kats Heaters Engine Block Heater - KH11815
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This cartridge heater clips into the cavity of your engine block and submerges in the coolant to keep engine fluids from thickening. Results in easier start-ups, faster heating of your cab, and less wear and tear on your vehicle in cold weather. Great Prices for the best vehicle heaters from Kats Heaters. Kat's Heaters Custom Fit Engine Block Heater - Cartridge Style - 120V - 400 Watts part number KH11815 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (123)
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Kats Heaters Vehicle Heaters - KH11815

  • Engine Block Heater
  • Cartridge Style
  • 400 Watts
  • Kats Heaters

This cartridge heater clips into the cavity of your engine block and submerges in the coolant to keep engine fluids from thickening. Results in easier start-ups, faster heating of your cab, and less wear and tear on your vehicle in cold weather.


  • Ensures smoother start-ups and faster heating and defrosting of your cab
    • Clips into cavity of engine block - no need to remove your frost plug
  • Warms engine fluid to increase lubrication and performance
    • Keeps fluid from thickening and protects against damage in cold weather
  • Pre-heats engine to reduce condensation in the engine block
    • Emits less pollution and fewer gas emissions
  • Includes removable power cord
    • Route through your grille and plug into standard 120-volt AC outlet
  • Durable cast-aluminum heating element
  • Custom fit for your vehicle
  • CSA approved
  • Made in the USA


  • Cord length: 5'
  • Wattage: 400 watts
  • Amperage: 3.3 amps
  • 1-Year limited warranty


  • Do not use this heater with a 100-percent antifreeze solution.
  • Do not start your engine with the heater plugged in.

Benefits of a Heated Engine

Start your engine easier and warm your cab faster in cold weather with this cartridge-style engine block heater. Heating your engine coolant keeps it from thickening and freezing, resulting in more reliable start-ups and smoother operation altogether. It also lessens the workload and extends the life of your vehicle's battery. And because starting your engine when it's warm creates less condensation in the engine block than starting it when it's cold, your engine will get better initial fuel vaporization, which causes fewer emissions and less pollution.

Cartridge-Style Heater

This cartridge-style heater simply clips into the cavity of your engine block. There is no need to remove the core frost plug. The power cord on the heater is removable so that you won't need to buy a whole new heater if the cord gets damaged. The cord can be routed through your grille for easy access to a 120-volt outlet or extension cord. Make sure the heating element is fully submerged in the coolant before plugging it in.

11815 Kat's Heaters Custom-Fit Engine Block Heater - Cartridge - Removable Power Cord - 120 Volts - 400 Watts

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Kat's Heaters Custom Fit Engine Block Heater - Cartridge Style - 120V - 400 Watts - KH11815

Average Customer Rating:  4.2 out of 5 stars   (123 Customer Reviews)

This cartridge heater clips into the cavity of your engine block and submerges in the coolant to keep engine fluids from thickening. Results in easier start-ups, faster heating of your cab, and less wear and tear on your vehicle in cold weather.

2012 Ford F-150

Install was a little tricky given the location for my vehicle 2012 F150. But other than that pretty straight forward. Packaging was good and product seems well put together. Only time will tell if it works well. I'm not in the cold climate yet. It also does come with the 3 prong as advertised.



Product has held up very well in the frigid North Dakota winters! Very happy with purchase!



Thanks for reaching out. I had just recently sold that truck about a month ago. But wanted to let you know that it has held up very well up here in ND. I had a question. I have recently upgraded my vehicle to a 19 F350 6.7. I wanted to know if you have anything available and if I could get one sent out. For whatever reason, my truck didn’t come with a factory block heater and now with the Ford recall on them. They aren’t in stock anymore and are WAY more expensive then what you guys have. Please let me know, look forward to response

Etrailer Expert

Heather A.


We do not carry a block heater designed to work on a 2019 Ford F-350 6.7 at this time.

2013 Ford F-150

Product is fine but, the installation instructions are terrible. Even contacting the manufacturer for the mounting instructions, terrible. Found the mounting place on YouTube. What's up with this?


This is the second Kat's heater in this car. The first lasted 5 years or so and worked well so decided to replace with same.

Terry A.


The second heater only lasted for 11 12 months and failed at the wire to heater connection. I returned it and a replacement has been sent under warranty.

2013 Ford F-150

Block heater gets hot when plugged in not installed. It will burn your hand. The battery wrap does heat up nicely. I have not installed them but assume they will work just fine.


Product was delayed, but paid same shipping cost.





Seems to be ok it was easy to install but I’ve only used it a couple of times.




Well this item installed on my 2020 Toyota RAV4 did fit but it is not as easy as with earlier models and located on the front left hand side (down low) instead of on the right hand side bank. I used the factory block heater installation instructions as a guide but found some of the steps unnecessarily (for example removing the air box). In any case be prepared to do a lot of it by feel because you cannot see the hole it slides into in the block unless you use a mirror and flashlight. The installation process took me about 2 hours.


Fast acting and effective engine block heater


Works great on my 09 Tacoma, takes about 6 hours to heat entire head and block to about 100 degrees Fahrenheit


Had to modify it to try and get this to fit as other people showed. Wouldn't fit and because it was modified it can't be returned. It would fit but you would be taking apart the engine cooling system because of rigid metal tubes and their brackets would have to be modified as its right infront of the hole, just to fit this into the slot of the block. Not worth the effort or time unless you want to pay a large amount of money to get someone to install it. Or if you have all the tools and a lift to install it yourself, since you will be going from underneath as well as above.


My Vehicle: 2021 Toyota Tacoma TRD Off-Road (4.0L 6cyl Auto)

This item is good quality but does not fit properly. It’s as if the circumference is a millimeter or two too-wide to fit in the engine block; it stopped itself maybe 3/4 of the way from a full install.

I bought this item before back in 2021 and had to remove my previous heating element due to it almost “melting” out of its socket because of the same issue I mentioned above; the clip would not secure no matter how hard I tried (“hammering” it in with a breaker bar *I made sure to not damage the electrodes* or even freezing it so the metal would hopefully shrink that extra millimeter or two).

Issue seriously needs to be resolved.


2014 Dodge Ram 5.7L uses Kat’s 11816 cartridge heater. Perfect fit. Must remove the two starter bolts and slide it out of the way. Don’t disconnect starter wires. Just slide starter out of the way. Easily done with truck on ramps. Clean out hole. Find a correct size retaining screw. Not sure what size or If hole is threaded. Too much rust. Just be able to jam some screw in there to retain the cartridge, until silicone dries. Smear about an inch wide layer of high temp silicone around the base of the cartridge. Insert cartridge, twist back and forth to spread silicone, and hold in place with retaining screw. Route wire straight forward. I used 1 1/8” spade bit to drill a hole in black plastic in bumper, but my bumper was already messed up, so I didn’t care much. Plug hangs out grill about 3”. Use zip ties to secure cord to square tubing frame post inside bumper.


Installed this on my 2019 Toyota Tacoma. Haven’t really tested it out yet as I installed it before it got seriously cold. Installation was easy. Just follow etrailers super helpful video. I did have to file a slight flat on the heater to clear the bell housing overhang. Not a manufacturer issue on the heaters part. Just normal variance on Toyota’s end.


Easy installation once we found the hole in the engine block where it goes, that is the hard part. Worked fine last winter, have not needed it this year.


Works great. Very happy with it.


You had a product that was very hard to get.


Fits like the factory one. The only issue I had is that the electrical cord is a bit on the short side. Other than that the heater works great.


Installation was surprisingly not dramatic…and everything is working as promised. Thanks once again for also the constant checking with me to make sure I received the product; very appreciated.


I cannot rate the product (which may be really fine) since there is no instructions given on installation so I'm stalled. Well the so called "instructions sheet" says to put the heater in the "cartridge" but doesn't give the slighlest idea where it is other than stating that for my car its situation is " LF" whatever that means.

Not on par with etrailer's business practices !


2015 Hyundai Sonata 2.4 install. Have to remove air intake, very tight to get it in just enough space. Had to trim a little bit to make it fit but nothing ever fits perfect. Picture say it all.


I live in northern Ontario, Canada. Average temp is -20 but has gone as low as -30/-35. This heater was installed in a 2016 Hyundai Elantra GLS 2.0 engine. Installation was easy once the battery box was removed. Slipped in the cavity real nice. The heater was plugged in for 4 hours at -20c. I then tested the engine for warmth. To my surprise the engine block was warm to the touch and the snow had a small circle on the hood where it started to melt. This surpassed my expectation, and I highly recommend this heater. Uses 350 watts per hr. That's less than a frost plug heater at 550 watts per hr. Shipping, packaging and instructions all great.


I installed this unit on my 2017 Tacoma when it had less than 10k on the odometer. Even with the engine bay clean and in like new condition, the heater was really difficult to install. The fit was really tight. I could not get it in the whole way and I did not want to tap on it with anything in fear of damaging the unit. With that said, it's in there and pretty much stuck. I have plugged it in during the cold months. When I fire up the truck in the morning getting ready to leave for work, I really can't tell if the Oil or Coolant are any warmer than if I didn't have the heater plugged in. Warm up times are about the same and the truck heater starts to warm up at the same time. I also don't know if it's ok to have the thing plugged in all night or if it should be on a timer. The instructions did not say. So all in all, For me I think it was a waste of money. The only thing it has done is spark up conversation when people see an extension cord plugged into the front of my truck. They say "I didn't know the new Tacoma came in a diesel?" Oh, one more thing. They sure could have made the electrical cord a few feet longer. I like doing a nice job of routing wires in my engine bay. The cord provided is so short you basically need to make a straight shot from your firewall to your grille.


I bought the car in Winnipeg MB with NO block heater when I got it home!! Luckily Etrailer had the heater I needed. Installation was a breeze and it works like a champ.

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Info for this part was:

Employee Lindsey S
Written by:
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Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Shelly K
Updated by:
Shelly K
Employee Matthew E
Updated by:
Matthew E
Employee David F
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