Lexus RX450H genuine 89904-48191 or 89904-0E031 proximity remote key

Genuine Lexus 4 button proximity key for use with a number of models where the circuit board number matches 271451-5290 as shown in the photos.

This key can match 2 part numbers: 89904-48191 or 89904-0E031

Your original remote circuit board must have the number 271451-5290 printed on it.

The information in the table above is intended to be used as guide only. The best method to confirm if this key is suitable for your vehicle is to either check the part number using your VIN via the dealer or open the remote and confirm the circuit board has 271451-5290 printed on it.

This remote transmits on 314.35 MHz FSK.

The specific symbol for the boot or trunk button indicates it suits models with the electric tailgate function.

Please take care when opening the case of your proximity key to not damage it. 

If you are not sure you can send us a photo of the front and back of the circuit board in your current smart key and we will assist you to identify the correct replacement.

On the back of this remote you will see the details:

FCC ID: HYQ14ACX
IC:1551A-14ACX
COFETEL RLVDE1408-0265
DENSO 14ACX

TOYOTA ID 4D DST-40 P1-98 TRANSPONDER

314.4 MHx FSK REMOTE

This type of proximity key is also sometimes referred to as a smart key or prox key as it allows you to start the vehicle without having to put it in a slot or put a key in the ignition.

The battery is included in the price and if you need a spare you can order this under compatible items.

A suitable aftermarket emergency key blade is listed under compatible items as one is not included in the price.

Coding an extra key when you have a working key is not a problem, however if you loose your only smart key, then the cost and complexity of the process escalate dramatically. It is not uncommon for customers to be charged up to $3500 by the dealer to resolve the issue when all keys are lost. Having a spare key for your Toyota is essential if you want to avoid a very large bill and the prospect of being without your vehicle for up to 3 weeks.

This type of smart key can only be coded to your vehicle using specialist diagnostic tools by a licensed locksmith or vehicle repairer. We can code the smart key and cut your key in our workshop in East Victoria Park WA or you can have it done locally to where you live.

We charge $90 to code this type of smart key and cut the emergency key blade. You will need to call to make an appointment.

WARNING! KEEP BATTERIES OUT OF REACH OF CHILDREN. Never allow children to replace button batteries on any device. Swallowing or placing a button cell battery inside any part of the body may lead to severe or fatal injuries in as little as 2 hours or less due to chemical burns and potential perforation of the oesophagus.

If you suspect your child has swallowed a button battery or placed inside any part of the body, immediately call the POISONS INFORMATION CENTRE on 13 11 26 for prompt advice. If your child is having any difficulty breathing, contact 000.

Dispose of used button/coin batteries immediately and safely. A battery can still be dangerous even when it can no longer operate the device. Place sticky tape around both sides of the battery and dispose of it immediately out of reach of children in an outside bin or recycle safely.

Please see button battery safety information from the Australian Competition & Consumer Commission (ACCC).

GEN REF: 89904-48191-60654

MK REF: MK5120-17418