The Prius injector rebuild kit I found for the Gen 2 Toyota Prius is one of those little parts kits that most people probably do not even think about until they are already chasing fuel trims, rough running, rich conditions, misfires, or injector problems.
After dealing with multiple engines, multiple injector sets, and way too many used parts over the years, I started looking for a proper Toyota Prius injector rebuild kit that included the small pieces most people overlook: the micro filter, the upper O-ring, and the lower seal.
This is the kit I found and used:
Buy the Toyota Prius injector rebuild kit on AliExpress
Why I Started Looking for a Prius Injector Rebuild Kit
For the 2004–2009 Toyota Prius, also known as the Gen 2 Prius, injector condition matters more than people realize. A lot of people will swap injectors, clean injectors, or grab used injectors from another engine, but they do not always replace the little service parts that actually seal and filter the injector.
That is where this Prius injector rebuild kit comes in. The kit I found is listed for Toyota Prius Hybrid Echo 1.5L injectors and references injector part numbers like 23250-21020 and 23209-21020.
The kit includes:
- Micro filters
- Upper red O-rings
- Lower seals
The listing I found offers a 4-set kit, which gives you enough pieces to rebuild four injectors. You can see it here:
Toyota Prius injector rebuild kit for 4 injectors
The Only Place I Found This Toyota Prius Injector Rebuild Kit
At the time I found this kit, AliExpress was the only place where I had personally found this exact injector rebuild kit for the Gen 2 Prius. I looked around because I wanted the micro filters, upper O-rings, and lower seals together in one kit instead of trying to piece everything together separately.
I am not saying it does not exist somewhere else. I am saying this is the only place I found it when I was looking, and this is the one I actually used.
Here is the same kit again for anyone who wants to check it out:
Order the Prius injector rebuild kit from AliExpress
My Experience With Used Prius Injectors
I have replaced the engine in my Prius over four times, honestly more like five times, so I have ended up with injectors from several different engines. On top of that, when I go to the junkyard and find a Prius that looks newer-ish or looks like it might have had good maintenance done, I will sometimes pull injectors from it.
My thinking is simple. Sometimes a car gets new parts, then it gets wrecked or totaled shortly after. That means there may be good injectors sitting on a car that only ran those parts for a short amount of time.
But even when the injector itself looks good, I still do not want to just throw it in without checking it, cleaning it, and replacing the service parts. That is why I like having a Prius injector rebuild kit like this on hand.
Checking Prius Injector Resistance Before Rebuilding
Before trusting a used injector, I like the idea of measuring the resistance and making sure all four injectors are within range of each other. That does not guarantee the injector is perfect, but it gives you a basic electrical check before you spend time cleaning and rebuilding it.
After that, the next step is cleaning them out and replacing the old parts with new pieces from the rebuild kit.
The kit I used gives you the main wear/service pieces:
- The small micro filter basket
- The upper O-ring
- The lower injector seal
For anyone looking for the same kit, here is the link:
Buy the Gen 2 Prius injector rebuild kit here
How I Cleaned My Prius Injectors
For my own injectors, I soaked them in Sea Foam for over 24 hours. After soaking, I used my test rig to push cleaning solution through the injectors.
My cleaning mix was roughly:
- 50% water
- 50% rubbing alcohol
- A little Sea Foam added into the mixture
That is what I used to press through the injectors and flush them out. Your results may vary, and I am not saying this is the only way to do it, but that is what I did on mine.
I will be adding pictures of my test rig and the cleaning setup later so people can see exactly how I had everything arranged.
Why Rebuilding Prius Injectors Makes Sense
New injectors can get expensive quickly. Used injectors can be a gamble. Refurbished injectors can also be hit or miss depending on who cleaned them, how they tested them, and what parts they replaced.
That is why rebuilding a known set of injectors makes sense to me. If the injector tests within resistance, does not appear damaged, and can be cleaned properly, replacing the filter, upper O-ring, and lower seal gives it a much better chance of working correctly.
This is not magic. It is just maintenance on a part that most people never really service.
What Comes in the Prius Injector Rebuild Kit
The kit shown in the listing includes enough parts for four injectors. The listing shows:
- 4 micro filters
- 4 upper red O-rings
- 4 lower seals
That gives you 12 total pieces, enough to service all four injectors on a Gen 2 Prius 1.5L engine.
Here is the kit again:
Toyota Prius injector rebuild kit with filters, O-rings, and seals
Final Thoughts on This Prius Injector Rebuild Kit
This Prius injector rebuild kit is one of those small, inexpensive parts kits that can make a big difference when you are trying to bring used injectors back into service. For me, it was worth trying because I already had multiple sets of injectors from different engines, and I wanted a better way to clean, inspect, and rebuild them instead of just guessing.
I have not found this exact kit in many places, and AliExpress was the only source I personally found for it when I was looking. Your results may vary, but if you are working on a 2004–2009 Toyota Prius and want to rebuild your injectors with new micro filters, upper O-rings, and lower seals, this is the kit I used.
Click here to buy the Toyota Prius injector rebuild kit on AliExpress
