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Honda Civic 12V Car Battery Replacement Guide
How to change a dead 12 volt automotive battery in the engine bay of a 9th generation 2012-2015 Honda Civic sedan.

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2013 Civic Engine Bay
Pull Off Wire Harness
Nut Under Wire Harness
This automotive maintenance tutorial was specifically written to assist owners of the ninth generation (2012, 2013, 2014, 2015 and probably also the 2016 model year) Honda Civic in changing a dead 12V automotive battery in the engine bay.

Owners of other Honda or Acura vehicles such as the Accord, Crosstour, CR-V, CR-Z, Fit, Insight, Odyssey, Pilot, Ridgeline, Stream, ILX, TSX, TLX, TL, RLX, RDX and MDX may also find these DIY instructions to be helpful.

The OEM car battery in this 2013 Civic LX sedan was a Honda part number 31500-TR0A-A01.

Other compatible replacement "Group Size 51R" batteries with their part numbers include the following: EverStart MAXX-51R (Walmart), Bosch 51R450B, AutoCraft 51R-2, Napa # BAT 6551R and Optima YellowTop D51R

The tools needed to replace the battery include a flat head screwdriver, a deep well 10mm socket with a 1/4" drive ratchet or a standard 10mm hand wrench.

Pull Off Rear Harness Fastener
Loosen Negative Terminal Nut
Pull Off "-" Terminal
The 12V automotive battery is located at the front right (driver) side of the engine bay.

Pull the plastic wire harness fastener off the front of the battery hold down bar. Then pull of the other wire harness fastener on the rear of the battery hold down bar.

Loosen the negative "-" battery terminal first by rotating the nut counterclockwise with a 10mm socket and 1/4" ratcheting wrench.

Pull the negative terminal straight off the "-" battery post.

Wrap Terminal In Towel
Open "+" Terminal Cover
Loosen 10mm Nut
Cover the negative terminal in a small towel and tuck it away on the side of the battery to help prevent accidental contact.

Then open the red plastic cover on the "+" positive battery terminal.

Loosen the 10mm nut on the positive battery terminal by turning it counterclockwise.

Pull Off Positive Terminal
Cover "+" Terminal With Rag
Loosen 10mm Battery Clamp
Pull the positive terminal straight off the "+" battery post, close the plastic cover, wrap it in a rag and tuck it away on the left side of the battery to help prevent accidental contact.

Loosen the nut on the front of the battery hold down bar by turning it counterclockwise with a deep well 10mm socket and ratcheting wrench or use a standard 10mm hand wrench.

Then slightly loosen the 10mm nut on the rear of the battery hold down bar by turning it counterclockwise.

Pull Out "J" Hook Bar
Lift Off Hold Down Bar
Pull Off Battery Box
Only loosen the battery hold down clamp nuts until the "J" hook bars can be removed from their mounting sockets.

Lift the clamp off the battery and set it aside in a safe place.

Pull the black plastic battery box (A.K.A. "cover" or "shield") off the battery and set it aside.


Pull Out Old Battery
Old 51R Battery & Cover
Honda # 31500-TR0A-A01
Carefully lift the old battery out of the engine bay and try to avoid tipping or dropping it.

The OEM (original equipment manufacturer) "Group Size 51R" battery in this 2013 Civic LX sedan was Honda part number 31500-TR0A-A01.

Clean Off Battery Tray
Lower In New 12V Battery
Replace Plastic Battery Shield
Clean off any debris from the battery tray in the engine bay so that the new battery will rest evenly.

Carefully lower the new 12V battery in to the engine bay with the "+" positive battery post on the left side and the "-" negative post on the right (driver) side.

Lower the black plastic battery box over the new battery.

Lower Battery Clamp Bar
Re-Insert Rear "J" Hook Bar
Re-Insert Front "J" Hook Bar
Carefully lower the hold down bar over the new battery while trying to avoid contact with the battery posts.

Re-insert the "J" hook bars in to their sockets at the front and back of the battery tray.

Tighten Rear 10mm Nut
Tighten Front 10mm Nut
Push On Positive Terminal
Tighten the two nuts at the top of the battery hold down bar by turning them clockwise with the deep well 10mm socket and ratcheting wrench.

If you've had a problem with corrosion (blue or white powder) building up on the terminals or battery posts, I'd recommend installing some felt anti-corrosion washers over the battery posts.

Push the "+" (red plastic cover) terminal on to the positive battery post.

Tighten 10mm Clockwise
Push On Plastic Cover
Push On "-" Terminal
Tighten the 10mm positive terminal nut in the clockwise direction until it is snug.

Do not over tighten the terminal nut to prevent from damaging the battery post.

Close the red plastic cover over the positive battery terminal.

2012-2015-Honda-Civic-12V-Automotive-Battery-Replacement-Guide-031 2012-2015-Honda-Civic-12V-Automotive-Battery-Replacement-Guide-032
Tighten Negative 10mm Nut
New Battery Installed
Push the negative terminal on to the "-" battery post.

Tighten the 10mm terminal nut in the clockwise direction.

Test the new 12V battery by starting the engine.

Be sure to adjust the time on the clock and set up your radio station presets before driving the vehicle.

For more, check out my other 2012-2015 Honda Civic DIY Repair & Maintenance Guides.

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