Vauxhall Insignia 2008-2017 Window Regulator Passengers Left Front 5 Door Estate on 2040-parts.com

Concept Car of the Week: Citroën C-Airdream

In the 1990s and early 2000s one of the most charismatic, brave and forward-thinking car makers, Citroën, had been reduced to the maker of budget, mainstream Euro boxes such as the Saxo and Xsara. The company hinted at its intentions to break free from its mundane existence as the maker of line-of-least-resistance rental cars with its Lignage concept in 1999 that harked back to its past large sedans, especially the CX. But it was at the 2002 Paris motor show that Citroën put a stake in the ground with its fabulously avantgarde Citroën C-Airdream concept.

New BMW M3 and M4 engine secrets laid bare

BMW's M division has lifted the veil of secrecy on the inline six-cylinder engine bound for its upcoming M3 sedan and new-to-the-range M4 coupe and convertible, revealing a potent twin-turbocharged 3.0-liter direct injection gasoline unit that produces an official 424 hp at 7,500 rpm and what officials describe as "significantly more than 369 lb-ft" of torque. The newly developed engine, known under the internal codename S55 B30, shares its 84.0 mm bore and 89.6 mm stroke with BMW's standard turbocharged 3.0-liter in-line six-cylinder direct-injection gasoline mill, the M55 used across the German car maker's lineup, endowing the aluminum block unit with an overall swept volume of 2,979 cc. This represents a sizeable 990 cc reduction on the engine BMW's M division's new unit replaces, the S65.

Autoweek in review: What you might have missed

The week started off well for BMW fans with the release of the redesigned 3-series wagon. The fifth-generation wagon is expected to reach the States in 2013. RM Monaco raked in more than $43 million in sales over the weekend.