Hi Ray, PSR5, PSR7, AR1 and AR2 are identical ISO micro relays (SPST-A).
The N006 relays are standard mini relays exactly the same was your old F1 pump relay. You can see here the pin layout Type 1 which is identical: Smart eMT Relay ECU - F1 Pump Relay
I need to check but I believe it's a 50A relay for the fans.
I looked and they are different.Regarding PSR5 (as well as PSR4), these micro relays are actually a bit different to the others like PSR7 as they have the additional 87A terminal. They are brown 20A/10A relays but can be easily replaced by any equivalent SPDT Form C micro relay. As you can see, the 30 terminal was also badly corroded on both PSR5 and PSR4 relays.
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I followed your advice and replaced them all. I'm going to cut the old ones apart and check for pitting. Thanks for the clarification.As an electronics engineer, i can comfortably tell you that nothing is more reliable than a mechanical relay, as long as you replace them (as noted in my discussion) after 14+ years of labor as the contacts will pit. The electronic version will never be as robust. The usual electrical transients, environmental extremes, and mechanical shock that they experience in an automotive environment are all bad for electronics. Cheap solution as noted is simply to replace the relays proactively. Simple job, cheap, and no downside potential. Great reliability improvement, and leaves the car as designed.
Great thread StefVan. Quick question: Would these Flosser 70amp relays be suitable for the N006 and F1 pump relays??
So all of the eight relays I posted above, PSR1, PSR2, PSR3, PSR6 and PDR2, PDR3, PDR5 and PDR6 use the same Bosch #0 332 011 007?For the other relays, this relay is a common 12V 20/30A SPST FORM A ISO Micro Relay used by many car manufacturers. Available from HELLA with reference #933766111 or Bosch #0 332 011 007.
You can also use the same relay with 3 terminals SPDT FORM C (85-87a-86) like Bosch #0 332 201 107 and remove the middle one (87a) where it's not needed.
Some more info here : https://www.scuding.com/Shop/en/content/16-smart-emt-f1-relay-ecu-recommendations
So all of the eight relays I posted above, PSR1, PSR2, PSR3, PSR6 and PDR2, PDR3, PDR5 and PDR6 use the same Bosch #0 332 011 007?
Actually, upon removing the RED relays I discovered they are 30A. All the others are 20A.
Should electrical contact cleaner be used when installing new relays?