Autopapyrus · Land Rover Discovery Sport 2.0 P200 (2021)
https://autopapyrus.com/guides/land-rover/discovery-sport/12-v-battery-replacement/
https://autopapyrus.com/guides/land-rover/discovery-sport/12-v-battery-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.
Land Rover Discovery Sport 2.0 P200 (2021): 12 V Battery Replacement
The 2021 Discovery Sport P200 is a mild hybrid with a start-stop system, so it needs an AGM battery, not a conventional lead-acid one. After replacement, the battery must be registered in the control module. Otherwise it will be charged using the old battery's parameters and the new battery will quickly lose its service life. This job involves only the 12 V battery. Do not touch the 48 V part of the hybrid system.
Part
| № | Part | Alternatives |
|---|---|---|
| 01 | 12 V AGM starter battery, 80-92 Ah, with gas ventfor start-stop system; cold cranking amps not lower than the original, terminals and dimensions the same as the original battery | Varta, Bosch, Exide |
Tools
9- 10 mm and 13 mm sockets and wrenches with an extension
- ratchet
- low-range torque wrench
- screwdriver or plastic trim removal tools
- gloves and safety glasses
- terminal brush
- multimeter
- external 12 V power supply for memory saving (optional)
- diagnostic scan tool with battery registration function
There's a full repair manual for this car
Every system, wiring diagrams and torque specs — not just this job. Haynes AutoFix (online).
See manuals →
Step by step
15 steps- Park the vehicle on a level surface, apply the parking brake, turn off the engine, close all the doors, and take the key or key fob at least 10 minutes away from the vehicle so the control modules go to sleep. Open all the windows so the windows and locks don't get stuck when power is disconnected.
- Write down the radio codes and make sure you have a way to keep power for the settings memory. Clock, seat, and window data may reset after disconnecting. To preserve the settings, connect an external 12 V power supply to the jump-start/power-support point as recommended by the manufacturer.
- Locate the 12 V battery. On this generation it is under the cargo area floor, in a recess under the carpet. Lift the floor and remove the plastic cover and sound insulation covering the battery. Confirm the location by the terminals with the red cover and the markings.
- Disconnect the negative (black) terminal first. Loosen the terminal nut with a 10 mm wrench and remove the terminal from the post. Do not damage the battery monitoring sensor on the negative terminal: do not pull on its connector wire and do not drop it.
- Disconnect the positive terminal. Flip up the red protective cap and loosen the nut. Cover the terminal with insulating material to prevent accidental short circuits.
- Disconnect the gas vent hose, if equipped, and note its position.
- Remove the fastener of the battery hold-down bracket (usually one 10-13 mm bolt or nut) and remove the bracket.
- Remove the old battery, holding it by the handle or the case. The battery weighs about 20-25 kg, so lift it with a straight back. Do not tilt it.
- Clean the recess of dirt and treat any corroded areas. Check the condition of the terminal cables, the sensor, and the gas vent hose, and replace any damaged parts.
- Place the new battery in the recess, orienting the terminals the same way as the old one. Secure it with the hold-down bracket. The tightening torque for the fastener is about 8-10 N·m (6-7 lb-ft); check the value against the marking on the bracket.
- Connect the gas vent hose, then the positive terminal first, then the negative terminal. The terminal tightening torque is about 5-8 N·m (4-6 lb-ft). Do not overtighten, to avoid stripping the thread on the lead post. Lightly coat the terminals with conductive grease.
- Reinstall the battery cover, sound insulation, and cargo floor.
- Turn the ignition on and wait 1-2 minutes. Check whether any warnings appear on the instrument cluster. If messages about the start-stop system or charging come on, this is normal right after a battery replacement.
- Register the new battery in the control system using a diagnostic scan tool with a battery reset function. Without this, the control module will keep charging the new battery using the old battery's algorithm, and the start-stop system may work erratically.
- Start the engine and check the voltage at the terminals with a multimeter: with the engine running it should be about 13.8-14.8 V. Reset the clock, radio, and the automatic window and sunroof functions if they were reset. Until the system completes its learning process, the start-stop function may be disabled. This is normal, and it will return after several trips.
Common mistakes and warnings
- Do not install a conventional lead-acid battery in place of an AGM one: the start-stop and regenerative braking systems are designed for AGM, and with a mismatch the battery will fail within months
- Take the old battery to a recycling point and do not throw it away
- Do not touch the orange high-voltage wires and components of the 48 V hybrid system; disconnecting and servicing them is a job for a repair shop
- If you have no experience with electrical systems or no scan tool for battery registration, leave the replacement to a repair shop, which will preserve the service life of the new battery