Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 04-26-2016, 09:12 AM   #1
Registered User
 
Join Date: Apr 2016
Posts: 13
swapping immobilizers

So im now shopping for immobilizer repair or swapping to an immobilizer from another car. i see on ebay that you can purchase an immobilizer, dme, keys and mechanical ignition switch as a unit. my question is if i swap to a new ecu/immobilizer that has a different mileage than my cluster will that cause problems? i know if i did that to my bmw that a "tamper dot" would appear on the cluster indicating not actual mileage.

will any other problems arise from swapping dme/immobilizers?

__________________
2002 986
1999 BMW M3
1985 BMW 350i (SBC swap)
1984 Buick Grand National
1971 Volkswagen Superbeetle
Racecar_Dave is offline   Reply With Quote
Old 04-26-2016, 09:18 AM   #2
Registered User
 
Join Date: Jul 2013
Location: Bastrop, Tx
Posts: 2,643
I doo it all the time with no problems. Your cluster mileage will stay the same
__________________
Woody
itsnotanova is offline   Reply With Quote
Old 04-26-2016, 09:57 AM   #3
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
Garage
Best thing to do is have it replaced by a reputable company that swaps EEPROMs.
All other options are pricey and will leave mismatched VINs and mileage (VIN is also in the cluster and climate control unit). Like Woody said, you can do it, but it's overkill and you'll have unmatched parts.

A repair shop that knows what it's doing will remove the EEPROM containing the car's VIN and stored keys from your old unit and put it into a new immobilizer, saving you a lot of trouble, work and possible issues down the road.
__________________
https://youtube.com/@UnwindTimeVintageWatchMuseum
particlewave is offline   Reply With Quote
Old 04-27-2016, 06:35 AM   #4
Registered User
 
jb92563's Avatar
 
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,665
I fried my ECU doing some testing on a sensor, probes slipped and shorted something.

I had to replace my ECU/Immobilizer and ignition key sensor as a matched set.

As the others have said the Gauge Cluster computer must remember the mileage but the VIN and other info is from the new ECU unit.

It never occurred to me to swap the chips, but wouldn't a programmer copy of the memory and write to the new unit be the best approach?

I imagine the chips are soldered in place so if you over cook it you could lose all the data as well.

__________________
"It broke because it wants to be Upgraded "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
jb92563 is offline   Reply With Quote
Post Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:04 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page