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⚡ Elevate your automotive game with Nilight’s powerhouse relay set!
The Nilight 50003R is a premium 5-pack automotive relay and wiring harness set featuring a 5-pin SPDT design with 40A/30A switching capacity at 12V DC. Engineered with durable silver alloy contacts and a unique male-female slot for seamless installation, it supports a wide range of automotive applications from lighting to fans. Backed by a 2-year warranty, this universal-fit relay set combines robust performance, easy wiring, and long-lasting reliability to power your vehicle upgrades with confidence.














| ASIN | B0748F1JK4 |
| Best Sellers Rank | #4,099 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Replacement Starter Relays |
| Brand | Nilight |
| Brand Name | Nilight |
| Coil Resistance | 50 milliohms |
| Coil Voltage | 12 volts |
| Connector Type | Plug-In |
| Contact Current Rating | 40 A |
| Contact Material | Silver Copper |
| Contact Type | Spdt |
| Current Rating | 40 A |
| Customer Reviews | 4.6 out of 5 stars 3,386 Reviews |
| Global Trade Identification Number | 00600537013346 |
| Included Components | 5PCS Relay Harness Set |
| Item Type Name | Nilight Automotive Relay Harness Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness - 5 Pack,2 Years Warranty |
| Item Weight | 8 ounces |
| Manufacturer | Nilight |
| Maximum Switching Current | 40 A |
| Maximum Switching Voltage | 30 volts_of_direct_current |
| Minimum Switching Voltage | 30 volts_of_direct_current |
| Model | 50003R |
| Mounting Type | Surface Mount |
| Operation Mode | Automatic |
| Part Number | NI-RE05 |
| Specification Met | UL |
| UPC | 600537013346 |
| Unit Count | 5 Count |
| Upper Temperature Rating | 125 °C |
| Warranty Description | 2 Years Warranty |
| Wattage | 560 watts |
O**L
Nice
They work great. Fast, easy, good price.
T**T
Good value, well made,
Nice packet of 12v 5-Pin automotive relays with attached pigtail connectors. Appear well made, well marked, good materials used and have built in mounting tabs which are a plus. Nice 30/40 Amp rated, comparable with most common 5-Pin 12V relays found on automotive accessory devices. Easy to install using the pigtail wiring instead of having to make individual connectors. The 5 pack is a good value for anyone adding accessories like lighting to a vehicle.
S**Z
Fantastic
They work just fine, good pigtail, have screw-point, all as described and expected.
Y**N
I'd buy it again
The fit on the connectors is super tight. They've been working in the texas heat for 1 month now and no problems. The plastic and wires seem thick and durable enough to last a long time.
A**A
Buen precio
Excelente y buena calidad. Tienen un precio muy accesible y más económico que en otros lugares.
M**C
relays that actually work out of the box
Used these for some LED light work on my truck and every single one worked perfectly with no surprises. The wiring diagram printed right on the relay is super helpful when you're doing your own install and don't want to keep looking stuff up. Having the harness included means no splicing which saves a ton of time and makes the whole thing look cleaner. Really solid kit especially for a 5 pack at this price.
M**Z
Easy straight-forward wiring!
The price is certainly right! What I like about this product is that it includes the connection socket with colored wires. What I found difficult with this product is that the connection socket slots are not perfectly aligned to accept the blades of the relay assembly. (It appears the socket was assembled without care). If one attempts to insert the relay assembly with force, it will damage the socket since not all of the blades line up to the haphazardly assembled socket. One has to first carefully match the relay blades to each slot in the socket by slightly bending the ones that don't fit precisely. Then the relay will insert without damage or difficulty. My brother's Jeep has messed up wiring in the low beam headlight circuit somewhere in the wiring loom. We used one of these relays to just rewire the low beam circuit to go around the bad wiring. The relay is controlled by the regular low beam switch on the steering column so the car still functions as if its original wiring was still in play. (We disconnected the original wiring from the low beam light filaments and replaced it with the output of the newly installed relay)! So far, it has been working perfectly for the past 2 weeks! What is still a mystery is how long will this relay continue to function seeing as it is from China? As an aside, one should 'cap off', (or at least tape off), the end of the unused red wire. It is a funtional wire connection to the relay that is not normally used.
R**O
Toyota starter relay replacement
Perfect replacement for Toyota starter relay. A year after my 5VZ swap on my 1989 Toyota 4Runner (5-speed/manual transmission/previously 3vz engine.) I started getting a "click no start" issue. New battery and checked EVERYTHING prior to finally testing the starter relay. Installed another used OEM Toyota relay that started doing the same thing. Added this relay with an inline fuse and hasn't given me an issue over a year. * *Blue wire is power wire on the relay, soldered the inline fuse to the blue wire, soldered a long wire I got off a parts truck, crimped a ring terminal on the end and hooked it up the positive terminal of the battery. Even ran my wires thru the male side of the old relay connector to give it a factory finish/look.
G**M
Bien producto
El arnés se ve de buena calidad, el cable que tiene es grueso, los relay entran justo en el arnes, hay que ver cuánto duran los relay
R**K
Great Value for the Money
I bought these as for a truck project, and thank goodness I bought the 5 pack. The wires are very good thickness, easy to understand schematics, and you can pull out the wires that aren't needed (3-4-5 PIN) to complete your project. I have connectted accenting lighting to LED Bars to this relay.
K**D
Nilight Relay +++
Used to add a relay to serve as a signal for connect to the high beam working as switch for shutting off the fog lights, working well and quality are pretty devent.
E**S
Buena calidad
Funcionó perfectamente para mi proyecto
A**R
good value
they work great and are way cheaper than buying at local stores.
Trustpilot
1 month ago
3 days ago