Best Car Starter Relays of 2025

"I found that the prongs were correctly oriented and the width fit my needs, although they were just a tad shorter than the original. I'm happy to have cool air flowing consistently again!"

"These relays are a bit smaller than the OEM versions, but they seem to be doing their job just fine."

"I used this relay for my motorcycle accessories and it works well. I appreciate the small form factor and the audible click when it turns on and off, which reassures me that it's functioning properly."

"I had an issue with my AC fluctuating between hot and cold air, but this switch fixed my problem. It was a much cheaper fix than taking it to a mechanic!"

"Installing this relay took me less than 5 minutes and it completely resolved my air conditioning issue. I appreciate YouTube for the guidance on how to install it!"

"The size was a bit different, but AutoZone assured me it would fit and work. I'm happy to say that it works just fine!"

“I used this to control power to a bus bar on my SxS for auxiliary lights. It works wonderfully, and looks very well made. All the internal wires are tucked away in a water-resistant shell. So far, it's a great value.”

“I have an LS swapped vehicle and needed a monster cooling fan that pulls 60 amps at startup and 40 amps running. A standard automotive relay wouldn’t handle this, so I bought this one. I’ve been very happy with it; it was easy to wire, and it even came with trigger wire pigtails, saving me time.”

“These relays seem to be of very good quality. Although I haven't installed them yet, the initial impression is great. They look robust and well-made.”

"I found this product to be good value for the money. The set arrived well-packaged, and while I used a different amperage fuse, everything wired up easily and works perfectly."

"During my van renovation, I appreciated how easy the wiring was. The included accessories were decent, but I did experience issues with some relays failing, leading me to consider replacing them with higher quality options."

"I used these relays for lighting and accessories in my Side by Side. They perform great for relaying switches instead of running full amps through them, making my setup much more efficient."

"I primarily chose these relays because they allow for easy mounting and help maintain a clean wiring setup. The built-in fuse is a fantastic feature. I've used them for low amp products like LED lighting without any issues."

"In my 4x4, I use these relays to avoid putting extra strain on the old wiring. They work exceptionally well, keeping the additional load off the original system."

"I love the design of these relays. They have been installed for a few months, and while one of the relays shorted internally, making my accessory stay on, I was able to replace it easily. Now everything is functioning properly, but it is a bit disappointing to have one out of six be faulty."

"I used this for my boat accessories circuit including stereo, lighting, and charging. The switch activated the relay to the fusebox, and everything works flawlessly."

"I installed this relay to power an external fuse block that activates when the ignition is on, connected with an 8ga wire to the battery. It worked perfectly."

"I utilize this to switch my inverter on and off based on whether the engine is running. It performs perfectly; I just hope it lasts!"

"For my airhorns, I needed a direct connection to the battery. This worked perfectly and ensures no load on the car's horn wiring. I plan to use it for my airbag compressors as well."

"I had a forklift that was constantly burning solenoids from the local auto parts store. I found this one online and decided to give it a try. When it arrived, I replaced the faulty solenoid and made a few adjustments with the battery cable. It fit well and has been working perfectly for the past month. I believe this has finally solved my solenoid issues. Just a heads up, it's larger than the typical solenoid, so ensure you have enough space for installation."

"This product was a complete disappointment. It simply will not disengage and does not function as advertised."

"I got stuck using this product right out of the box. Any little bump caused it to turn on and left my starter engaged. I ended up buying a second unit because the first one only lasted a week before breaking down."

"I had a $340 Rockford Fosgate 1200 watt car stereo amplifier that, after 5 years, got stuck in the 'on' position due to an internal relay failure. I thought, why not use an external relay? I was initially concerned that the relay cord from the car stereo, which is probably rated 0.5-1a, wouldn't provide enough power, but it worked perfectly! Now, the amp turns off with the car stereo, voila!"

"Over the years, while replacing cooling fan relays on various vehicles, I've started using this style. The 80a or 100a relays don't burn up even when the fans fail. Some might say it's overkill for the amps, but I’ve never had to replace a relay due to failure when driving cooling fans."

"I installed this on my 96 F150 with the 302 engine. It was a perfect fit and works great so far. Plus, the price was good with quick delivery."

"For my 85 F-150, the unit was easy to install and fit perfectly in the existing mount points. Everything is great!"

"I received this unit on time, and it was simple to install. It works just as intended."

"For over a year, I couldn’t enjoy honking my horn while driving my 2007 Honda Element. I thought it was broken, but my son replaced the fuses, and now my horn is working perfectly. If anything changes, I'll keep you updated!"

"I found this 4-pack of relays to be just what I needed for my Honda Crosstour. They were easy to install and worked perfectly."

"I tested all four relays before I put them in, and I'm pleased to say they all worked fine. I replaced two on my Honda CRV that seemed suspicious, and now everything is functioning properly."