2012 Jeep Wrangler Unlimited on 2040-cars

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Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.

Feds chastise Marchionne over Jeep recall, only 13% repaired so far

Following the significant outcry surrounding the General Motors and Takata airbag safety crises this year, the National Highway Traffic Safety Administration seems to be taking a much more aggressive role in pushing owners to repair their recalled vehicles. In the agency's latest move, it's urging Jeep drivers to get their models fixed. Acting NHTSA administrator David Friedman even sent a letter to Fiat Chrysler Automobiles CEO Sergio Marchionne pressing him to get more of the SUVs fixed. The problem goes back to the recall of the 2002-2007 Liberty and 1993-1998 Grand Cherokee because of the possibility for the fuel tank to rupture in some rear crashes. The campaign affected over 1.5 million vehicles, but Chrysler initially refused NHTSA's request for a repair campaign. The automaker eventually came up with a fix that involved adding a trailer hitch to provide extra protection to the tank. The feds believe the danger "will be reduced by the remedy now offered by Chrysler," according to the statement. However, this latest push comes out of NHTSA's concern that only three percent of the affected vehicles are repaired, although Chrysler maintains some 13.4 percent have actually been fixed. The agency is asking the automaker to reach out to owners "proactively," and get them to bring the Jeeps in dealers. According to the the feds' statement, the company "has nearly 400,000 parts available" to perform the fixes, and it's still producing more. Friedman's letter to Marchionne goes even further, alleging NHTSA has received reports that dealers are turning customers away who request the recall. He asks the CEO to prove within 15 days that these claims are false. "Given the low rates of repair that Chrysler has reported more than a year after the recall, significantly more aggressive steps are required," says a portion of the note. According to The Detroit News, Chrysler has subsequently promised to speed up the recall work, vowing that all dealers will have at least 12 repair kits in stock by Monday. Further, it has announced plans to ramp up its notification campaign with Facebook ads and public service announcements. Scroll down to read NHTSA's full statement on the matter, and Friedman's letter to Marchionne can be read in PDF format, here.

FCA expands Jeep Cherokee recall to 68k more vehicles

FCA is expanding its airbag software update for the 2014 and 2015 Jeep Cherokee to cover 68,593 more of the vehicles worldwide. This brings the total to 316,774 Cherokees. Of those, there are now 230,240 in the US, 28,110 in Canada, 6,367 in Mexico, and 52,057 outside of NAFTA. According to the automaker, after reviewing the potentially affected population, it discovered these additional Cherokees in need of the upgrade. The original campaign to repair these vehicles was announced in early February. Engineers found a small number of cases where dramatic changes to the angle of the vehicle that upset its balance caused the side-curtain and seat-mounted side airbags to deploy because they anticipated a rollover. This especially occurred when driving off-road. According to FCA, there're no additional reports of this happening, and the company isn't aware of any injuries or accidents. The fix is simply a software upgrade that recalibrates the airbags' deployment. Related Video: Statement: Restraint-System Software Upgrade May 12, 2015 , Auburn Hills, Mich. - FCA US LLC is expanding by an estimated 62,148 vehicles its recall of U.S.-market SUVs** to upgrade air-bag software. The action follows a routine review of the originally reported vehicle population by FCA US engineers. There have been no additional incidents and FCA US is unaware of any related injuries or accidents. The campaign will upgrade software that governs side-curtain and seat-mounted side air bags following a small number of inadvertent deployments – most of which occurred in harsh, off-road environments. They were prompted by maneuvers that dramatically changed the vehicles' angle of operation, relative to the ground, and the air-bag systems – sensing potential rollover conditions – automatically activated. The software upgrade will recalibrate the threshold for deployment and the vehicles will remain compliant with all applicable safety regulations. Affected are certain 2014 and 2015 Jeep Cherokees. The revised estimate for the U.S. totals 230,240. Revised estimates for other markets are as follows: 28,110 in Canada; 6,367 in Mexico and 52,057 outside the NAFTA region. The revised global total is 316,774 – a difference of 68,593. The Company will notify affected customers. Software will be available at that time. Customers with additional concerns or questions may call 1-800-853-1403. ** http://media.chrysler.com/newsrelease.do?id=16332&mid=431