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:

    Avoid short journeys
    Fig. 138 Fuel consumption in litres per 100 km at two different ambient temperatures The engine and catalytic converter need to reach their proper working temperature in order to minimise fuel ...