Seat Leon >> Battery: removing and installing


  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Open cover in heat insulation sleeve.
  • Connect the battery charging device for battery supported operation.
  •  Open cover -4- over negative battery terminal.
  • Slacken off nut -6- several turns and disconnect battery clamp -5- of earth cable from negative battery terminal.

Starter, current supply, CCS

Vehicles with start / stop system

  • Disconnect the connector -1- on the control unit for monitoring the battery - J367- -2-.
  • Slacken the fixing nut -4- and disconnect the control unit for monitoring the battery - J367- -2- from the negative terminal -3-.

Starter, current supply, CCS

Continued for all versions

  • Open cover -3- over positive battery terminal.
  • Slacken off nut -2- several turns and disconnect battery clamp -1- of positive cable from positive battery terminal.

Starter, current supply, CCS

  • Pull heat insulation sleeve -4- upwards slightly.
  • Remove bolt -2- on battery retainer plate -1-.
  • Pull battery -3- out of battery tray and lift out of engine compartment.

A loosely fitted battery creates the following dangers:

  • Shortened service life due to damage from vibration (danger of explosion)
  • The cells in the battery will be damaged if the battery is not secured correctly.
  • Damage to the battery casing through the retainer plate (possible electrolyte leak, high resulting costs).
  • Poor crash safety.

Starter, current supply, CCS

Vehicles with start/stop system


  • Because of their higher deep-cycle resistance, only special batteries are used in vehicles equipped with a Start/Stop system.
  • When renewing the battery, note the correct part designation.
  • Batteries intended for use in vehicles with a Start/Stop system are marked "AGM" (Absorbent Glass Mat) or "EFB" (Enhanced Flooded Battery).


  • Insert battery in battery tray -1- so that battery base strip makes contact at bottom and side of stop -arrows-.

Starter, current supply, CCS

Depending on the battery used in the vehicle, the battery holder is equipped with three securing positions; mount the fixing bar -Position 1, 2 or 3-.

Starter, current supply, CCS

  • Place battery retainer plate -1- in position.
  • Lug -arrow- on battery retainer plate must engage in recess in battery base strip.
  • Tighten bolt -2- for battery retainer plate.
  • Connect up battery in the following sequence with ignition and electrical equipment switched off:
  • First connect battery clamp -3- of positive cable by hand to positive battery terminal "+" and tighten nut -4-.

Starter, current supply, CCS

  • Attach the battery terminal clamp -5- of the earth lead onto the negative "-" terminal of battery by hand and tighten nut -6-.

The following measures must be carried out after re-connecting battery:

  • Activate the automatic open / close function of electric window lifters .
  • Connecting vehicle diagnosis tester .
  • Call up and delete the event memory .

Starter, current supply, CCS

Note After re-connecting the power supply, the ESP warning lamp may not go out until the vehicle has been driven a few metres.

    Assembly overview - battery - Retainer - Screw 15 Nm - Positive wire Disconnecting and connecting - Nut 6 Nm - Heat shield - Cover for positive terminal - ...

    Disconnecting and reconnecting battery
    CautionObserve the following instructions and precautions on safety when working on pyrotechnic components: When working on pyrotechnical components (such as the airbag, belt ...

    See also:

    This overview will help you to familiarise yourself with the controls and displays. 1 Door release lever 2 Light switch 3 Air vent 4 Lighting control for instrument and control lighting 5 Headli ...