There’s usually only one big driveability problem that prompted the customer to visit your shop.

Primary complaint: oil leak at the high pressure fuel pump. With a new seal on the pump the engine was very difficult to start and often didn’t or repeatedly stalled.

The Nissan LEAF combines hydraulic braking, regenerative braking, and traditional accelerator technology into one device: the e-Pedal. You’ll have to keep the system calibrated so key components can function together.

In this issue: 2005 Jetta 2.5L PCV/Vacuum Leak • Getting to Know Mr. Mezger, Part 2 • 2009 Tiguan 2.0L Fuel Pressure Error • This Audi Diagnosis Was Bad Timing for All • VW and Audi Ignition Coils • Tips and Tricks with a 2008 Audi A6 3.2L No Crank/No Start

Make sure you have a clear overall picture of what’s actually happening using function diagrams and flow charts, then zero-in with a process of elimination and XENTRY.

The air-cooled Porsche Mezger engine proved its worth for years. Water cooling extended its life even further.

As BMW begins rolling out several new models of its advanced EVs, why not make everybody who visits your shop aware of your readiness to be right on top of the new EVs.

Today the choice of engine oil is not a simple exercise, even within a single marque like BMW. Different engine families have different requirements, and those requirements are spelled out in great detail in BMW service literature.

The fuel tank is an integral part of engine performance, emissions control, and, safety systems. Problems are rare, but can be real head scratchers.

BMW cooling systems have been keeping repair technicians and enthusiasts busy for a long time. Cooling system issues almost seem like the Achilles heel for BMW vehicles as they are quite common. As far back as the E30, clogged radiators and blown coolant hoses were common.