What Exactly Is the 4R36 Movement and Can I Mod It?

With so many watch movements out there in the market, it can be a real challenge if you’re trying to keep up and keep track of all of these movements to know which one meets your needs best. But then again, there are some tried-and-true movements out there, such as the 4R3X movements out there, based on the amazing 7S26 that’s well-respected in the watch community.

Today, we’re going to delve into the 4R36 respectively to help you understand what it has to offer, especially when it comes to modding:

What Exactly Is the 4R36 Movement?

Seiko 4R36 movement is an automatic mechanical movement developed by the iconic Japanese watchmaker Seiko. This movement was released in 2011 and is an upgrade to the 4R35 movement, which was released in 2009. The 4R36 movement is mainly used in the Seiko 5 series of watches. It is a workhorse movement that is reliable and accurate.

The Seiko 4R36 movement is an automatic movement, meaning it runs on the energy generated from the wearer’s wrist. This is achieved through a rotor which spins as the wearer’s wrist moves and winds the mainspring. The movement is hand-wound and has a power reserve of 41 hours.

The Seiko 4R36 also features a day-date complication, meaning the watch can display both the day of the week and the date. This complication is adjusted via the crown and can be set to a variety of languages, including English, Spanish, French, German, and Italian.

The movement also features a hacking function, which stops the second hand when the crown is pulled out. This is useful for ensuring precise time settings. It also has a quickset feature which allows the wearer to set the time quickly and easily.

Can I Improve and Mod the 4R36 Movement?

The simple answer is yes! In fact, they’re a popular movement to be modded.

One of the most popular modifications for the 4R36 movement is to replace the stock movement with a higher-end version. The 4R36 movement comes with a range of different specifications, and replacing the movement with a higher-end version can improve accuracy and reliability. This is a relatively simple modification and can be done without too much difficulty. There is a variety of aftermarket 4R36 movements available, so it is worth doing some research to find the right one for your needs.

Another popular modification for the 4R36 movement is to add custom engravings to the movement. This is a great way to add a personal touch to your watch and can really make it stand out. There are a number of companies that specialise in custom engraving for the 4R36 movement, so it is worth looking into if you want to make your watch unique.

Finally, there are a number of other modifications that can be made to the 4R36 movement. For example, you can replace the stock hands with aftermarket ones or install a new winding mechanism. These modifications can be more complex and require more skill, but they can provide significant improvements in accuracy and reliability.


In conclusion, the 4R36 movement is a great movement and can be easily improved and modified by the end user. From replacing the stock movement with a higher-end version, adding custom engravings, or replacing the hands, these are all popular modifications that can be done relatively easily. So, if you’re looking for a great movement that you can model and use to your heart’s content, be sure to check out the 4R36 movement!

Seiko Mods is a provider of various custom mod parts for Seiko watches in the UK. Check out what we offer today and mod your Seiko watch!

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