1981 Yamaha Sr 185 Ignition Coil on 2040-parts.com

In pictures: proof that Saab will rise again

"NEVS SAAB car No1" is a slightly clunky and unlikely sentence to put on a dot matrix display, but for legions of Saab fans the world over, it's a definite reason to be cheerful. Because at 13:22 Central European Time on Wednesday 18th September 2013, a pre-production Saab 9-3 rolled off the production line in Trollhättan. It's the first car to do so since the marque’s collapse in 2011.

BMW Concept X4 (2013) first pictures of baby X6 coupe-SUV

This is the BMW Concept X4, which borrows the idea of an SUV with coupe proportions from its X6 brother, and shrinks the template down to the size of an X3. But don't be fooled by the 'Concept' tag of this car – like the Concept 4-series coupe we saw in 2012, the X4 is very much confirmed for production, and will receive only detail styling tweaks before it goes on sale in mid-2014. It'll be built alongside the X3, X5 and X6 models at BMW's Spartanburg factory in the USA from early 2014.

Heifer fuel

Unlike most people, when Michael Doyle drives past a herd of cattle grazing in a field, he doesn't see future tenderloins or T-bones. He sees fuel. The company Doyle co-owns, North Star Biofuels, is about to start production of biodiesel at a new $15 million, 20,000-square-foot plant in Watsonville, Calif., about 60 miles south of San Francisco.