Do it yourself
Frequently asked questions about cars and motorcycles
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  2. Audi
    3. :
  3. A3 Sportback
    4. : Heater core

Audi A3 Sportback - Heater core

Heater Core Audi A3 Sportback (2012-2019 / mk 3)

Audi A3 Sportback (2012-2019 / MK 3)
A problem concerning the heating radiator of the Audi A3 Sportback.
A problem concerning the heating system of the Audi A3 Sportback from 2013 onwards, especially regarding diesel engines, is that the heating radiator gets …Read all…
Posted on 2 August 2025 by ScegliAuto
Audi A3 Sportback (2012-2019 / MK 3)
A problem with the heating radiator of the Audi A3 Sportback.
On the Audi A3 Sportback, especially on the 2.0 TDi version, there is a known issue with the internal heating radiator, where particles and deposits can form …Read all…
Posted on 23 January 2025 by ScegliAuto
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What Could Cause the Smart Instrument Cluster to Show Three Lines

When the instrument cluster of the Smart shows three lines, it indicates that there are issues with the gearbox and it cannot engage; otherwise, an "N" would appear. To diagnose the problem, you need to obtain an OBDII reader, which can easily be found on any e-commerce platform for a few pounds. The most common cause of failure is damaged wiring from the controller to the gearbox engine connector. These wires may touch the intercooler housing, leading to abrasions, possibly a frayed wire. The video also shows wires touching each other, which can create issues; there may be a damaged sensor, or the problem could be with the gearbox motor. Often, it is the moisture that damages the wiring.

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