If you are shopping for a replacement Heybike controller, the first thing you notice on Heybike's own Motor Controller page is that it is one product with a long list of model options. Two of those models, the Mars and the Cityscape, each come in two versions: "Regular Port" and "3C Port". This guide sticks to what Heybike has published about that choice, says plainly where the published information stops, and gives you a careful way to order and fit the part anyway.
What Heybike's controller page lists
When we read the page on October 21, 2026, the model list included the Ranger S (750W and 1000W), Ranger, Cityrun, Mars 2.0 (750W and 1000W), Brawn, Tyson, Explore and Sola, plus four entries that carry a port label: Mars (Regular Port), Mars (3C Port), Cityscape (Regular Port) and Cityscape (3C Port). The other models are listed without a port label. Most options showed as sold out that day, so check stock before you plan a repair around the part.
What Heybike says about the 3C port
The page carries two short notes. The first says to choose the correct model before purchasing. The second is the one that matters here: Heybike says that, due to the demand for accessory upgrades, a buyer of the Mars or Cityscape controller "may receive one with a 3c interface," and that this "does not affect the bike's work despite the difference in appearance from the original."
In plain terms, Heybike itself expects the part in the box to sometimes look different from the controller you are replacing, and says the bike works the same either way.
What the published information does not tell you
This is where many parts guides quietly guess. We could not find any of the following on the product page, in the Mars 3.0 user manual, or in Heybike's Mars 3.0 FAQ:
- what a "3C port" physically is, or how it differs from the regular port in pin count or wire order;
- how to tell which type your own bike has;
- whether the two types can be swapped between bikes;
- which model or model year takes which port.
A web search in English and in Chinese turned up nothing official beyond that product-page note, so this guide does not publish a pin chart or a compatibility table. If you see one elsewhere, treat it as unverified unless it comes from Heybike.
A careful way to order and fit a controller
These steps are our general advice, not Heybike instructions, apart from the battery detail noted in step 4.
- Identify your exact model first. The controller page lists Mars 2.0 750W and 1000W as separate options from the Mars entries that carry a port label, so confirm which Mars you own before you pick a variant.
- Photograph the old controller before you touch it. Take clear photos of the housing, any label, the plugs and how the wires run.
- Send those photos and your model to Heybike support before you buy, and ask in writing which version they will ship. The page itself says you may receive a 3C unit, so it is better to know in advance.
- Power the bike off and take the battery out before unplugging anything. Heybike's Mars 3.0 manual describes removing the battery with the key in the UNLOCK position.
- Compare before you connect. Lay the new controller's plugs next to the old ones. A different-looking housing is something Heybike says to expect. A plug that does not match the old one in shape or pin count is a reason to stop and ask, not to force it.
- Fit one plug at a time and keep the old controller. Mark each plug with tape as you unplug it, and keep the old part until the bike has been tested.
Check that the controller is really the problem
Heybike's Mars 3.0 manual lists E60 as "Controller failure," but it also lists E61 throttle, E62 communication, E64 brake and E65 motor or Hall sensor failure. Its troubleshooting table gives loose wiring and a loose or damaged motor plug wire among the causes when the motor does not respond at power-on. Those are cheaper to check first. Our guide to Heybike error codes E60 to E65 walks through the codes, and our e-bike repair diagnosis page can help narrow down a fault before you buy a part.
If your bike is still under Heybike's limited warranty
Heybike's Mars 3.0 manual lists the controller and wiring harness among the components its limited warranty covers. It also says the warranty does not cover installing parts "not originally intended or compatible with the Ebike as sold," and that Heybike is not responsible for damage caused by "unauthorized service or use of unauthorized parts." The manual states that modifying the product beyond the original manufacturer's design is strictly prohibited. If your bike is still covered, ask Heybike how they want a controller fault handled before you open anything.
Where RideRow fits
As of October 21, 2026, RideRow does not list any Heybike controller, and nothing in this guide says a RideRow part replaces one. If the rest of your repair involves connectors, throttles, sensors or wiring, you can browse our e-bike spare parts.
Sources: Heybike's Motor Controller product page, the Heybike Mars 3.0 User Manual (V3) and Heybike's Mars 3.0 FAQ, all read on October 21, 2026. Product options, stock and policies change, so check Heybike's current pages for your exact model.
RideRow is an independent parts retailer and is not affiliated with, endorsed by, or sponsored by Heybike. Heybike and model names are trademarks of their respective owners and are used here only to identify the bikes this guide covers.