Had the vehicle running at idling till the engine temp reaches around 103 degrees. And it stayed on 103 degrees for some minutes before the bottom hose started picking up heat. At the same time radiator outlet sensor started climbing in degrees. When bottom pipe became hot fans came on. I am new to the Audi world and have limited knowledge of them, so please be kind! I have owned many performance cars from Japanese makers as well as Porsche and BMW, but Audi is a new world to me. I have recently gained an interested in purchasing a b8.5 A4 as a daily, with the updated engine and 8 speed transmission. Audi A4 Complete Engines. It almost goes without saying that the engine is the most important part of the Audi A4 or any other premium automobile for that matter. It is the source of energy that runs the Audi, with no fewer than five valves per cylinder and 155 pounds-feet of torque. Where the Audi A4 did show a weak link was the CVT (continuously variable transmission) used with the 2.7-litre turbodiesel. It never feels truly settled while also being sluggish when it comes to acceleration. Much better is the semi-automatic S tronic used with the 3.0-litre V6 diesel, although most drivers will be best served by the 1.8 TFSI I currently have a 200 Cell HFC with a 3" Dual Exhaust Stage 2 Flash Via Powergate3 Tuner. ECS Turbo Intake Hose With the Drop In AFE Pro Dry Filter. I inquired about an Tune and or an Intake Kit. Direct From the mouth of APR, " While I would definitely recommend a tune, The B8 A4 platform Intake is good up until 500HP. The Audi A4 B8 is a sophisticated machine that requires regular maintenance. Learn what you'll need to do to keep your engine and other major systems running for years longer, how to extend your warranty, and what common problems and repairs to watch out for. Find out the difference between the sports package and the S-line, and the benefits of the B8 over the B7. STEP 1: After opening the bonnet, remove the 4 bolts on the Airflow panel indicated below, using a t26. STEP 2: Locate the 3 plastic bolts indicated below. Push down on these plastic bolts. STEP 3: Remove the Airflow panel by pulling towards the engine bay and lifting upwards. Pull the bulb socket out of the housing. To disconnect the bulb from the socket, you'll need to push in a tab on the socket and pull the bulb from the socket. Repeat this for the other side. Figure 1. Remove the lower bolts and pull back the wheel well lining. Figure 2. Remove the fog light bulb. It’s among the best engines of the Audi A4 B7! The RS4, produced in limited numbers from 2006 to 2008, was even more powerful, thanks to its 4.2-liter V8 engine that produced a whopping 420 horsepower. Later, the 4.2-liter V8 engine came back in the Audi RS4 (B8) produced between 2012 and 2015, delivering 450 horsepower. Edmunds' expert review of the Used 2014 Audi A4 provides the latest look at trim-level features and specs, performance, safety, and comfort. At Edmunds we drive every car we review, performing 145oVWn.