As I understand the back of the EZL module is coated with a white thermal paste and uses the car's fender to act as a heatsink to disperse the heat it produces.

I read that many older EZLs fail if the thermal paste coating drys out and prevents the EZL from cooling?

Is this true?

Aren't EZLs available off eBay for like $30? I see them all the time!

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2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles

(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)