I am curious how many people have had their fuel pumps die on them and at what mileage.

It's not something I'd normally replace as preventative maintenance but getting stranded on the highway isn't a great experience!

My 2002 LS430 has 172,000 miles on it. Runs great but curious how long these things last.

 

The LS430 fuel pump is robust and catastrophic failure is rare. However, it is equipped with an overheating protection circuitry that will shut itself down until the pump temperature returns to normal. The LS430 fuel pump is a submersion type which is cooled by the gasoline. If you, say, take a long freeway-driving during the summer and you let the fuel level dip too low. The fuel pump can get overheated and shutdown while you're on the freeway. Of course, a new pump would not help you in this scenario. Check out the link below...

https://www.clublexus.com/forums/ls-...fuel-pump.html

 

Bumping this old thread.

I took my 05 on a 2500+ mile trip around a month ago and parked it since. I had no time to change the oil and do a clean up/mini detailing. It would crank but would not start when I wanted to move it outside. The fuel pump testing is easy enough but I am also curious to know when the pumps are starting to go bad for people. The car was flawless the entire trip and I am lucky to have this no start condition at home. If it turns out to be the pump, it will be new OEM. It is too critical a part to monkey around with universal fit or used with unknown mileage.

If there is an age related pattern to failure, it would be good to know.

 

I've yet to hear of a failed LS430 fuel pump, so yours may be the 1st if that is the cause.

 

I have sold a grand total of ONE fuel pump for an LS430....

 

Treasurecoast as in Treasurecoast Miata?

 

We are on a Lexus forum...

 

Nah I know, but like Moss Motors does cars other than Miatas, say. Just figured I'd ask.

 

My 2005 has 206k miles on the original fuel pump. Hope I didn't just curse myself lol.

 

Still on my original at 170k miles. I try to not often drive with < 1/4 tank. From personal experience with LS430 and also ES350, I'd sooner recommend proactively changing alternator at 150k. I know 2 es350s and my own LS430 that went around that mileage, an mine left me in need of a tow. Also learned that charging a dead battery by driving around is not ideal... not that i have a solution. I got a jump pac but that is not to recharge battery. Anyway, I got a reman alternator, since I did not want to tow car to dealer far away. It's been 2-3 years now and held up fine. Was about $500 installed. After that, I will look into changing my radiator with my next timing belt in 2 years, when car is age 22. (Hope this can save me on the labor)

 

Well, I picked up a used fuel pump with sending unit as a test subject for $30 but mine is working just fine. The plan was to install just to test start the car then buy a new OEM pump for a permanent repair.

The factory service manual has this drawn out procedure to test for voltage at the ECU to rule out ignition problems. I can't find in the service manual how to test the 3 sensors that detect engine position. They just talk about replacement (how to). There is the crank sensor, cam sensor on the left side cam gear, and a third sensor between the middle two cylinders on the right side head that is called a "crank sensor" that reads the position of the right intake cam in the parts diagram. I think I will buy all 3 of these out of the junked car for $20, swap each, and try to start. Of course, I will break all of the brittle connectors so I need to buy them to have on hand. Same deal here. If I find the broken one, I will buy new OEM. Gotta jump on this before the tariffs go higher.

 

UPDATE

Picked up all the sensors from the junked and it still would not start so I went back to the fuel pump and found it is working intermittently without any pattern. Fuel pressure was not building properly so the engine would not start. I dropped in the junkyard unit and it runs perfectly. The donor car had over 250K miles on it which is over double my mileage. I need to install a new pump for peace of mind.

Does anyone know if part number 23221-50110 is made in Japan or USA?

Asking because I bought an OEM radiator for this car last summer for nearly $400 but it was made in China/plastic tanks were way inferior to the factory unit. It was identical to the RockAuto $150 Denso unit also made in China. I do not want to get burned again. If the OEM pump had been "improved" by making it cheaper, I am better off leaving the high mileage quality unit in permanently.

 

Aisan fuel pump (not Aisin) was made in Japan. These fuel pumps are insanely good, high quality with a cast end cap. If you see "replaced by" from a particular vendor then you might not get one that is as good as original to the car.
I wouldn't, as long as you have the original Aisan it will likely never die. I recently revived a seized Aisan that had sat for who knows how long (forward/reverse polarity a bunch of times) it has been working ever since. If you still insist on buying new
https://www.amayama.com/en/part/toyota/2322150110

As for radiators I'm seeing more and more made in China units from Toyota.

 

I replaced mine with an OEM from the dealer when I did a huge tune up last year. Mine was ok but I did tons of preventative maintenance so I won’t have any major surprises for at least 10 or 15 years. Probably more like 20 or 25 since it’s a weekend car

 

Thanks for the info to you both.

There is an Aisan pump on ebay but the price is too good to be true when the Chinese made aftermarket pumps are more expensive.
https://www.ebay.com/itm/32382505715...iABEgIGAvD_BwE

I will chew the fat on this a little bit. The car is really not needed to be in service until the fall when I am planning to take a 600 mile trip.