2008 Dodge Avenger 2.0L Diesel · B20 MRG

Sharing its front suspension layout with the Chrysler Sebring, the Avenger's lower control arm bushes and press-fit ball joints degrade rapidly on British road surfaces. The voided rubber in the rear compliance bush tears under lateral cornering force and braking loads, while the ball joint develops dangerous axial free play. Worn suspension arms cause front-end clattering over potholes, a vague steering centre-point, and MOT test rejection for excessive play in steering and suspension joints.

The 2.0-litre CRD diesel engine features rubber and silicone charge air hoses connecting the turbocharger, front-mounted intercooler, and intake manifold. Oil contamination from the crankcase breather coupled with high boost pressure leads to degradation of the rubber wall, causing the lower intercooler boost hose to split along its underside bend. When boost leaks, the engine loses manifold pressure, generating a loud rushing air hiss, triggering black exhaust smoke under acceleration, and causing the ECU to enter limp-home mode.

On 2.0-litre and 2.4-litre World Gas petrol engines, the drive mechanism inside the electronic throttle body uses internal nylon reduction gears to actuate the butterfly valve. With age, heat fatigue and motor torque cause the delicate plastic gear teeth to strip or jam. Once the teeth shear, the throttle valve cannot open or close accurately, prompting the ECU to illuminate the lightning bolt Electronic Throttle Control (ETC) light and force the vehicle into restricted limp mode with limited engine revs.