We consider a engine bay wiring harness 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: Nilight Wiring Harness READ REVIEW

Best For Plenty Of Wire: Buy: Nilight Engine Bay Wiring Harness READ REVIEW

Best For Customer Service: Buy: Tikscience Engine Bay Wiring Harness READ REVIEW

Best For High Quality Reinforced Ring Terminals: Buy: High Performance Injectors Engine Bay Wiring Harness READ REVIEW

Best With Overall Good Quality: Buy: Apsg Engine Bay Wiring Harness READ REVIEW

Best For Auto: Buy: Painless Engine Bay Wiring Harness READ REVIEW

Best For Easy Installation: Buy: Painless Engine Bay Wiring Harness READ REVIEW

Best Overall: Nilight Wiring Harness

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If you want nothing but the best long-standing harness, then night wiring harness is the one you should definitely consider, as it manages to bring a lot to the table. The night wiring harness is installed easily and it is super bright. You can also use it for household lighting such as garden, backyard, garage, and indoor lighting. This wiring harness extension kit can be installed on boat, yacht, skiff, freighter and ship to enhance the illuminating brightness of the voyage.

The harness allows for adequate usage, is easy to install, it is made with fast shipping and has a play design. Above all, the night wiring harness is suitable for trailer, forklift, excavator, dozer, road roller, crane, tractor, harvester, grain drill, mower, snowplow, fire engine, rescue vehicle, camping, mining, construction and other outdoor lighting.

Almost all customers quickly discovered that the harness is easy to use, nice to have in the lighting kit to extend the harness. Also, a few say that the harness is easy to connect to an existing wire harness and no hassle with male/female connection points. To sum up, most customers agree that the harness suits them best, and no one questions it.

• A bright environment is very convenient for you to enjoy your fun time.
• It is easy to have a neat and tidy engine bay.
• 10feet, you can mount your light at the desired lighting location.
• Madefrom high-quality materials for superior wear resistance, and ensurelong-lasting performance of your lights.

Best For Plenty Of Wire: Nilight Engine Bay Wiring Harness

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Best part: Nilight Engine Bay Wiring Harness costs comparatively little and it is available to ship in 24 hours. The nilight engine bay wiring harness worked out great and it is designed for a great price. 1 x 12 foot wiring harness, 1 x instructions. Also, this works fine and it works great.

The harness is easy to install and it is great with a rocker switch. In addition, the harness works well and it is very sturdy. Most importantly, the night engine bay wiring harness is for the passenger side, very easy and it is yellow.

Most buyers opine that the harness is used for a radiator fan manual on/off. Further, they strongly agree that the harness is a great harness for one pair of lights with a single switch. Also, they also found that the harness is built well, and has wire stamped " 14awg. In short, the tone of buyers is very positive and we believe that the harness suits the purpose.

• This comes with a 3 prong switch.
• This provides correct wire connectors for the system.
• This is great for plenty of wire and it is rectangular.
• This is pretty thick, is auxiliary and it is perfect for extra wire.

Best For Customer Service: Tikscience Engine Bay Wiring Harness

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate harness. The Tikscience Engine Bay Wiring Harness is exactly that - it's a simple harness that hits all the right notes. The tikscience engine bay wiring harness is made of a plastic body. The fuse box block kit meets or exceeds old standards, and the quality gives you a unique experience. Moreover, it is made of durable materials and it is good for fuel pump.

Above all, the tikscience engine baywiring harness is fit for ls swap, works well with installation instructions and it is automotive.

One customer says - "They are weird with completely different color schemes. ". Most customers quickly discovered that the harness came with a label on the lid.

• These are for quality assurance and it is designed for easy installation.
• This is designed for internal engine bay use with excess wire length included.
• You can watch the installation video on the youtube website.
• You can enjoy reliable quality, fast service and competitive prices.

Best For High Quality Reinforced Ring Terminals: High Performance Injectors Engine Bay Wiring Harness

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If you often find yourself scrambling for a convenient and suitable harness, High Performance Injectors Engine Bay Wiring Harness should be your first option for buying. The high performance injectors enginebay wiringharness is comfortable and it is very nice. Manufacturer says: We offer these adapters, if you request them, during or after the order. Moreover, it is made with fuel injector connectors, comes with a DLC port and it is great for decent quality.

The harness is suitable for ring terminals, is good for low quality and it is perfect for the instruction manual. Most importantly, the high performance injectors engine bay wiring harness comes with an English manual. To add to that, there is a 3 wire maf and a 1 wire alternator.

Almost all buyers found that the harness works with canoe driven. In addition, they strongly agree that the harness will work, but make sure the injectors are compatible with the harness connections. Also, a few strongly agree that if the harness works for a 95 model transmission then it for sure will not work.

• Check with us if you are unsure about fitment.
• This comes with an English manual and features any good loom should have.
• This is used for fuel pumps and it is an automotive.
• This has a one - year specific transmission.

Best With Overall Good Quality: Apsg Engine Bay Wiring Harness

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The Apsg Engine Bay Wiring Harness is capable of outshining several other harnesses featured in this list in overall features. The apsg engine bay wiring harness comes with great parts and it works well for good quality. Make sure this fits by entering your model number. Moreover, it comes in with direct fit, is good for very good quality and it is built with overall good quality. Most importantly, the apsg enginebay wiring harness is for the brand new knock sensor and it fits great.

One customer says - "shipped fast and fit my 2003 350z. ". They also found that the sensor and this harness are located aster seven layers or so.

• Solves DTC diagnostic engine light trouble code p0327 smog test.
• Z-tec upgrade | rodent proof wire.
• Engine ignition emissions knock sensor wiringharness for select Nissan & infiniti vehicles.
• Engine ignition emissions knock sensor wiring harness for select Nissan & infiniti vehicles.

Best For Auto: Painless Engine Bay Wiring Harness

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The Painless Engine Bay Wiring Harness should be able to handle its purpose and duties with ease. The painless engine baywiring harness is easy to apply to wiring that is already installed. It allows you to keep your wiring routed and secured away from moving parts, high heat and from abrasion, all while cleaning up the install. Also, it is suitable for power sports and has an excellent design.

The harness is great for autos and it is resistant to automotive chemicals. Above all, the painless engine bay wiring harness makes for easy installation, It has temperature rating and has great design.

Almost all customers found that the harness was also split lengthwise.

• A minimum 25% overlap keeps classical secure over wires, hoses, and more.
• This provides excellent blockage against mud and dirt, while maintaining adequate drainage.
• This is a self-wrapping split braided wiring loom for that classic show car look.

Best For Easy Installation: Painless Engine Bay Wiring Harness

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Painless makes beautiful and great harness with classic and smartly chosen materials. The Painless Engine Bay Wiring Harness is easy to apply to wiring that is already installed. Make sure this fits by entering your model number. Moreover, it is suitable for power sports, is automotive, it has temperature rating and has an excellent design.

The harness is a self-wrapping split braided wiring loom for that classic showcar look. Lastly, the painless engine bay wiring harness provides excellent blockage against mud and dirt, while maintaining adequate drainage.

"The only drawback is that it deforms if you heat it too much when melting the ends to keep it from fraying. " - says, one customer. To sum up, at the price, they believe that they got a steal of a deal with it.

• This is great for auto,s it is resistant to automotive chemicals and has a great design.
• A minimum 25% overlap keeps the classic braid secure over wires, hoses, and more.
• Delivers what they promise.