We consider a m4 relay to be a worthy investment in the long run. We are here to help you pick the right one for your purposes from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Irhapsody M4 Relay READ REVIEW

Best For Lights: Buy: Epauto M4 Relay READ REVIEW

Best For Easy Wiring: Buy: Nilight M4 Relay READ REVIEW

Best For Good Quality: Buy: Ehdis M4 Relay READ REVIEW

Best For Door Locks: Buy: Uxcell M4 Relay READ REVIEW

Best With Part Number: Buy: Xspeedonline M4 Relay READ REVIEW

Best For Car Sound Systems: Buy: X Xotic Tech M4 Relay READ REVIEW

Best Overall: Irhapsody M4 Relay

Buy on Amazon

The latest Irhapsody M4 Relay is an absolute beast in terms of its features, and rightfully takes the top spot with ease. The irhapsody m4 relay comes with excellent waterproof, has operating tice and it is good for life expectancy. Easy to install. Just make sure you follow the wiring diagram. The 5 terminals of the relay have been sealed, which will bring more stable performance.

The relay provides effective protection and it is perfect for great quality. And, the relay is rated current and it is perfect for high quality. Above all, the irhapsody m4 relay is black, It is made with quality wiring harnesses and has a mounting style.

Most buyers found that the relay is the legal way to run it on a boat fuel pump. Also, a few say that the relay can be used in auto fan installation and on boat project. Further, a few strongly agree that this is a universal relay and it comes with a wiring diagram for different configurations. As a result, buyers were very happy to recommend it to friends and would-be buyers.

• This is strong, is suitable for temperature range and it comes with strong mounting points.
• This has a good sealing feature and is very robust.
• Did a 5 x 12 v dc waterproof relay and harness.
• 12 awg tinned copper wires for pin 30, pin 87, pin 87a. Length: 5.1in.

Best For Lights: Epauto M4 Relay

Buy on Amazon

Next on the list, we've got yet another relay that manages to win our hearts. It's the Epauto M4 Relay and it's widely considered as the relay that has the most suitable features. The epauto m4 relay is switching current, can trust for good quality and it is destructive. Make sure this fits by entering your model number. In addition, this is great for ambient temperature and it is functional.

The relay is strong and it works great. Above all, the epauto m4 relay worked perfectly and it can be bought for good value.

Most customers quickly discovered that the relay can be used in a normal open or close configuration, which covers every switching need. Further, a few strongly agree that the relay is suitable for a continuous 30/40 amp load. In addition, a few strongly agree that the relay is great for lights or other hiamp switching. In conclusion, for almost all customers, Epauto product was what they were looking for.

• This makes them easy to work with.
• This is mechanical and it is best for exact fit.
• This is perfect for automotive control of high amp auto electricity.
• This is placed in the power circuit of the camera.

Best For Easy Wiring: Nilight M4 Relay

Buy on Amazon

Nilight offers a variety of relay for personal choice and yet maintains quality in all the variants. The night m4 relay is good for temperature range and it provides great value. Make sure this fits by entering your model number. The relay sockets come with different colors for loads / accessories, simple and convenient wiring.

The relay is made of high-grade materials to ensure superior quality and long lifespan. In addition, the relay is suitable for nilight led light bar wiring harness kit. Finally, the night m4 relay is sturdy, it worked perfectly and has a mounting style.

Most customers opine that the relay is all their information about the relays... specification. And, they strongly agree that the relay looks like 14ga wire on the pigtails. In addition, a few strongly agree that this type of relay was extremely popular with American and European (and possibly Asian) manufacturers on cars, light, medium, and heavy duty trucks prior to the 90's.

• This is a fair way to get them along with the sockets.
• This is already in, without the coil energized.
• The manufacturer offers a kit for this @ about $ 60.00.
• This is a direct fit and worked as intended.

Best For Good Quality: Ehdis M4 Relay

Buy on Amazon

If you often find yourself confused about the appropriate and satisfactory relay, Ehdis M4 Relay is your end point. The ehdis m4relay is great for high - value relays and it is good for country of origin. Using this kit will eliminate a high voltage drop in the wire, so it allows your components to work properly. These are heavy duty 80a relays.

The relay is good for life expectancy and it can be bought for good value. In addition, the relay can be used to install electric cooling fans, electric fuel pumps, electric water pumps, shaved door handles solenoids, trunk solenoids, horns. Lastly, the ehdis m4 relay is brand new and it is switching current.

Almost all buyers found that the relay is where a switch connected to a 12v dc input will be connected to the relay. Also, a few strongly agree that the relay is good for incab only ( it is not waterproof) If you want to use the outside side of your vehicle, then go for the waterproof relay only. Moreover, they say that 80 amp is the maximum current the relay contacts are designed to handle.

• Mechanical life of 100,000+ cycles, life expectancy mechanical: 10,000,000 operations.
• This comes with a socket, You need butt connectors to connect the pigtails.
• This is reliable, sturdy and it is made with heavy wires.
• 12 volt 80 amp 5-prong relay socket with 5 wires.

Best For Door Locks: Uxcell M4 Relay

Buy on Amazon

The Uxcell M4 Relay is capable of outshining several other relays featured in this list in overall features for the price point. The uxcell m4 relay is great for adding car stereo, alarm system, remote start, fog lights, underwear lighting, turn on domelight, shared door handle, truck release, reverse polarity, door locks, honk the horn and more. Make sure this fits by entering your model number. The interlocking design on the harness allows multiple harnesses to be coupled together for organization and ease of setup.

The relay is made of metal and plastic, durable materials for long - time service. Further, the relay is recommended to confirm the model, appearance, and function before placing an order. Finally, the uxcell m4relay is black and it is suitable for cars.

Therefore, customers were eager to recommend it to friends and would-be buyers.

• This is not connected to the power, the indicator light will be off.
• This features a 4 pin layout that accepts female spade terminals.
• Pin number: 4; current: 40a; voltage: dc 48v.

Best With Part Number: Xspeedonline M4 Relay

Buy on Amazon

The Xspeedonline M4 Relay is satisfactory and appropriate and fits well with your daily purpose. 100% tested before shipped out and fits your machine directly, requiring no further adjustment. Make sure this fits by entering your model number. When it comes to searching for a reliable relay, the xspeedonline m4 relay is definitely your first choice.

• ✪Flat mounting base with 7mm mounting holes-60mm & 180 degrees apart, sae-j1171 marine certified.
• ✪5/16-18 threaded motor & battery studs, 10-32 threaded excitation & ground terminals.
• New and hot releases.

Best For Car Sound Systems: X Xotic Tech M4 Relay

Buy on Amazon

The X Xotic Tech M4 Relay's high-end materials make sure that it ages well with use. The x xotic tech m4 relay has features for 1 5-pin SPDT mini relay socket and wiring, The relay is rated at 30 amps normally closed and 40 amps normally open. Pre-wired socket for easy plug and play installation. Moreover, this has a universal application and can be used in automotive setups, car sound systems, security systems, and various other applications.

Above all, the x xotic tech m4 relay fits such as led light bar, pod/driving light, high power headlight.

• This is a x xotic tech trademark brand product, exclusively available at Xotic Tech.
• Fits such as led light bar, pod/driving light, high power headlight,high efficient copper wiring.
• Good investment for the long term.