This is an excellent subject, and I would like to add a little of my experience. I believe that the fuel pumps are bomb proof unless the fuel is badly contaminated. not something to be normally concerned about in this country, but hot sandy countries, e.g. Spain, can supply poor fuel. I had a relay failure in my first 745 after 8 years, in my second when it was about 10, and in my '97 940 when it was 14. The earlier relays were more troublesome. After my first experience I always kept a spare and the one that I used as a replacement in the 940 was originally purchased for a 740.
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