Where to buy official OEM parts.

I've never bought here, but it looks about as official as you can get.
Genuine OEM Parts for Your Toyota

 

I have used these in the past with good results:

Toyota Parts - Genuine OEM Toyota Parts & Accessories Online

Toyota Parts Online | Olathe Toyota Parts Center

I just helped another member a couple of weeks back do both the engine and inverter water pumps. Fairly straightforward, just takes patience to bleed the engine side.

Good luck with your water pump

 

Parts.com

The current engine coolant pump lasted 9 months and was sourced from the Toyota dealer? How many miles did you travel during that period?

 

I use this dealership's online catalogue a lot, just for reference; it's all Toyota parts I think:

Toyota Parts | Toyota Online Parts | Genuine Toyota parts | Toyota Parts Online

So far, I've just gone down to my nearby Toyota dealership parts department.

 

I used olathetoyota there very good once there was a part number discrepant and a parts guy from there actually called me to discuss it.
Whatever you do don't use RockAuto they used to be great but I have the worst luck with them. I recently bought some calipers for my Crown Vic expensive oem Motorcraft ones and one of the calipers shipped to me was a core return from someone. It had brake fluid leaking through the box when they delivered it. Pissed.

Your much better off buying oem for most Prius parts. I try to get the part number off a toyota online site and then quick search on ebay and amazon of that part number. Sometimes you will find that oem part real cheap. Must have the oem box though they can't forge that.

Good luck.

 

There's a dealership in my state that offers parts 20% off so I mention that to my local place and they begrudgingly match it. Try haggling 15-20% from local parts departments, otherwise that's about the discount you can expect from online sellers.

 

Toyota recently posted a complete Electronic Parts Catalog for the U.S. market on their own website, https://parts.toyota.com/. They don’t sell directly from that site, but it links to local dealers selling online. Aside from the parts counter in a Toyota or Lexus dealer, this is the most reliable way to find and buy genuine parts.

Sadly, counterfeiters make not only fake parts, but also fake labels and packages; see this brochure from Toyota in Australia (PDF) for an example. I have no reason to believe the same thing isn’t happening in the U.S., too.

There is considerable markup on most Toyota replacement parts. Dealers near me routinely advertise 33%-40% off the list prices on their websites, but they face vigorous competition here.

If the same part number is also used on Toyota vehicles sold in Japan, another source to consider is one of the exporting firms in Japan that delivers to the U.S. by Express Mail, sometimes at a lower total cost than buying the same part from a U.S. dealer. See my previous posting for more about this; to be shipped, the parts have to be small, lightweight, and harmless. The parts I’ve received from Japanese sellers have appeared to be genuine, but I’ve ordered mostly obscure items that wouldn’t be worth counterfeiting.

 

We get ours from an authorized dealer, Olathe Toyota ,they ship!