
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*1 : If TOP TIER Detergent Gasoline is not available, one bottle of additive is
recommended. Additives are available from your authorized HYUNDAI dealer along with
information on how to use them. Do not mix other additives.
*2 : The drive belt should be replaced when cracks occur or tension is reduced excessively.


*3 : Fuel filter & Fuel tank air filter are considered to be maintenance free but periodic inspection is recommended for this maintenance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging, loss of power, hard starting problem, etc. replace the fuel filter immediately regardless of maintenance schedule and consult an authorized HYUNDAI dealer for details.
Scheduled Maintenance Services
Maintenance Under Severe Usage ConditionsHyundai Elantra AD (2016-2020) Service Manual: Intake Manifold Components and Components Location
Components
1. Intake manifold assembly 2. Intake manifold gasket3. Electronic throttle body4. Intake manifold stay5. Variable intake solenoid (VIS) actuator6. VCM motor
...
Hyundai Elantra AD (2016-2020) Service Manual: Description and Operation
Description
The charging system included a battery, an alternator with a built-in regulator, and the charging indicator light and wire.
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" terminal.
In addition, the ...