ldc

Has anyone gone through a life of their remote battery?

Just want to get some estimates on how long the battery on the remote lasts.

ecr527

I don't think anyone's car is old enough for the battery to go dead. I would guess that it would last at least a couple of years.

Jherb350

iTrader: (1)

The manual states that the remote battery should last around 2 years.

Bichon

One of mine went dead prematurely after just 2 1/2 months. The replacement is still going strong a year later, so it must have been a dud cell. Read my original thread, it has lots of good information including battery type and availability: https://www.clublexus.com/forums/sho...d.php?t=202623

LexusIS-TL

Hmmm, this is a concern. I may just have to buy some spare batteries just in case should I get locked out of my car. The mechanical key inside it should open the doors and the dealer told me that there should always be enough charge to start the engine (by holding the transponder next to the Start button--lol, sounds like talking about Windows Vista).

Bichon

That's what I did. I'd rather not deal with popping off and replacing the painted cover over the mechanical door lock, for fear that in the heat of frustration it will get scratched, dropped, stepped on, or lost. As you know, Murphy's law predicts that you'll be doing this when it's dark, pouring raining, wind blowing, etc.

Nope, not how it works. It uses passive RFID. When you hold it next to the start button, the reader generates a strong electromagnetic field that induces a current in a coil in the fob, which powers the dead key long enough to start the engine.

Most electric toothbrushes are charged this way. No direct electrical connection -- the charging base induces a current in a coil in the toothbrush handle.

LexusIS-TL

So no matter how dead the battery is, it will always start the car? Is this frequency generated by the car itself or the transponder?

Bichon

You can take the battery entirely out of the key fob, hold it next to the start button, and it will still start the car. The reader (behind the start button) generates a strong electromagnetic field, a coil in the key fob uses that induced energy to power the transponder (in place of the battery).

Irishman06

Yup, it works just like the RFID badge you probably use to get into work every day.

ldc

I would think it will vary according to usage.

I was curious because i valeted one of our guest's is250 and the remote battery was gone (so the owner said). What was strange was, the remote was still working (lock/unlock windows up/down etc) but the display says key not detected. I'm thinking it might not have been the remote but something else

pisaykotik

I remember reading that the battery generally lasts for 2 years. Fortunately my dealer replaces them for free and recommends it done annually.

wolverine

iTrader: (9)

m info display said low battery last night. I called my dealer and they have it in stock but I was wondering if its covered under warranty?

ISbb

I think the idea is even the key fob battery is dead we could use the KEY to open the door and put the empty key fob very close to the start buttom to start the engine!

Bichon

Ray Catena Lexus replace mine for free when I told them I'd bought the car at their dealership; the battery was inexpensive enough that they didn't even bother writing up any paperwork. If your dealer charges you, stop by the waiting room and grab a pastry on the way out and you'll be even.

kickin8

iTrader: (1)

that's right. get their sodas for free and eat their food......

not a bad idea to stock couple at home just in case.....and dont forget, you have FREE lexus roadside assistance !

(they will rescue you in X hours, just be patient...... HA!)