Where can I get a replacement remote for an Astro2WA

Doubtful.

Hi,
Is the 3-button remote from Mazda too? If it is and it's from the same year range as your MPV it may work. In other words, many car makers used the same type of keyless remotes on all their vehicles in a given year range. But if the 3-button is much newer or older you're probably out of luck. You can search on Ebay to see what types of remotes were sold for your year car.

If this is NOT a Mazda remote and neither was the 4 button they may use a different frequency (think 'radio station') and won't 'talk' to the car's keyless remote compuer.

TD

Programming
When
Remote control added or replaced. System malfunction.
How
Obtain all remote controls. A maximum of 3 remote controls can be programmed. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press lock or unlock button. System should now lock or unlock vehicle. Within 4 seconds: Press lock or unlock button. Within 10 seconds: Press lock or unlock button of first remote control. System should now lock or unlock vehicle. Press lock or unlock button of second remote control. System should now lock or unlock vehicle. Press lock or unlock button of third remote control. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed remote controls.
IMMOBILIZER CAN ONLY BE SET BY DIAGNOSTIC EQUIPMENT

Programming
When
Remote control added or replaced. System malfunction.
How
Obtain all remote controls. A maximum of 3 remote controls can be programmed. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press lock or unlock button. System should now lock or unlock vehicle. Within 8 seconds: Press lock or unlock button of first remote control. System should now lock or unlock vehicle. Press lock or unlock button of second remote control. System should now lock or unlock vehicle. Press lock or unlock button of third remote control. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed remote controls.
NOTE: If less than 3 remote controls are to be programmed, remove ignition key after programming last remote control
NOTE THIS IS FOR YEAR 99-02

Programming
When
Remote control added or replaced. System malfunction.
How
Obtain all remote controls. A maximum of 3 remote controls can be programmed. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press lock or unlock button. System should now lock or unlock vehicle. Within 4 seconds: Press lock or unlock button. Within 10 seconds: Press lock or unlock button of first remote control. System should now lock or unlock vehicle. Press lock or unlock button of second remote control. System should now lock or unlock vehicle. Press lock or unlock button of third remote control. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed remote controls.
NOTE: If less than 3 remote controls are to be programmed, remove ignition key after programming last remote control.

well i would deffinatly have the battery checked out because more than likly if you left the key in the on position the battery is dead let me know if this helps

VW/AUDI/SEAT/SKODA



Remote Control Programming (1997 ON)

Procedure
1. Switch Ignition ON and leave the key in the ignition.

2. Mechanically lock the vehicle using the Drivers door using a second
key.

3. Using the remote control press the Unlock button once, and the horn
will sound once.

4. Wait 6 seconds and press the unlock button once to activate the coding
procedure. The remote control will now be programmed.

NOTE : When performing programming on additional remotes the procedure
is the same, except you press the unlock button 2, 3 or 4 times for the
different remote.

For example : If programming 2 remotes press the unlock button twice with
a 1 second interval between each press, repeat for 3 and 4 remotes.

5. Switch Ignition OFF.

6. Remove key from ignition and check for operation.

7. The coding procedure can be repeated up to 4 times for additional remotes.

8. The ignition must be switched OFF between programming each remote
control.

Remote Control Erasing (1997 ON)

Procedure
1. Switch Ignition ON and leave the key in the ignition.

2. Mechanically lock the vehicle using the Drivers door using a second
key.

3. Press the remote control unlock button 5 times in 1 second intervals.
A short horn will sound.

4. Wait 6 seconds and press the unlock button once to activate memory
erase.

5. Switch ignition OFF, all remotes are now erased.

Note:
Entering the programming mode cancels all learned keyless remotes, so
none of the previously programmed remotes will work. You must reprogram
all of the keyless remotes once you are in the programming mode. You must complete each step within 4 seconds of the previous step to keep
the system from exiting the programming mode. You must program remotes
within 10 seconds of each other
1. Turn ignition switch to ON (II)
2. Within 4 seconds press the LOCK or UNOCK button on one of the remotes.
(An unprogrammed remote can be used for this step.)
3. Within 4 seconds turn ignition switch to LOCK (0) position
4. Within 4 seconds turn the ignition switch to ON (II)
5. Repeat steps 2, 3 and 4 two more times using the same keyless remote
used in step 2
6. Within 4 seconds press the LOCK or UNLOCK button on the same remote.
Make sure the power door locks cycle to confirm you are in programming
mode.
7. Within 10 seconds press the LOCK or UNLOCK button on same remote.

8. Within 10 seconds press the LOCK or UNLOCK button on all other
remotes you want to program. Make sure door locks cycle after you push
each remote button to confirm system has accepted the remote.
9. Turn the igniton switch to LOCK (0) to exit programming mode.
10. Test remote(s)

Before you spend bigger amount, check the battery in the key. Usually a CR2032 battery can be find there. (Open the Keyfob by inserting an object into the key ring holder and pulling the top and bottom apart, Seperate the two halfs, Open the top half to expose the battery... )