My problem was solved (2006 VW Jetta wouldn't start). The relay was hard to reach, hidden under the dash behind a hard-to-reach light switch. Car wouldn't start / engine behaved strangely (second air pump problem) (no lights on dashboard) so I decided to replace the relay, it worked. Also had to replace a coil pack with 1 spark plug, not sure if the two issues are somehow related. Good product, hard to find (Autozone and others don't really have many in stock).
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