What car uses a 51R battery?
The 51R battery is a common group-size for 12-volt car batteries, and it appears across many makes and models rather than being tied to a single vehicle. In practice, there isn’t one specific car that exclusively uses 51R; it is a widely used size that can fit a variety of vehicles.
To determine whether your particular vehicle uses a 51R battery, you should confirm by checking the battery label, the owner's manual, or a parts catalog listing by your car’s VIN. This article explains what the 51R is and how to verify compatibility.
What is a 51R battery?
A 51R is a defined automotive battery group size within the standard system used to label battery dimensions and terminal layouts. The “51R” designation helps technicians and buyers identify a battery that fits a specific vehicle with matching dimensions, terminal orientation, and power ratings. The key takeaway is that 51R refers to a physical size and layout, not a single car model.
Understanding group sizes is important because it ensures the battery fits properly in the tray, reaches the electrical connections, and delivers the expected cold-cranking performance for the vehicle’s climate and electrical load.
How to tell if your car uses a 51R battery
Use the steps below to confirm whether your vehicle requires a 51R battery or another group size.
- Check the battery itself for a label that reads “Group Size 51R” or simply “51R.” The label often sits on the top or side of the battery.
- Consult the owner’s manual or the vehicle’s service manual section on the electrical system or battery specifications.
- Use your vehicle’s VIN (Vehicle Identification Number) on a reputable parts retailer or the manufacturer’s site to look up the recommended battery group size.
- Measure the battery tray space and compare the dimensions (length, width, height) to the standard 51R measurements if you have access to a measurement chart.
- Note the terminal orientation (which side the positive and negative posts are on) and compare with 51R specifications if you’re shopping for a replacement.
Confirming the group size before purchasing helps ensure the battery will fit physically, connect correctly, and provide the right performance for the vehicle.
Helpful considerations when dealing with 51R batteries
In addition to confirming fit, consider the following factors when selecting or replacing a 51R battery.
- Cold-cranking amps (CCA) and reserve capacity (RC) suitable for your climate and electrical load.
- Maintenance type (maintenance-free sealed lead-acid vs. serviceable flooded batteries) based on how you plan to service the car.
- Type of plate technology (standard flooded, AGM, or EFB) depending on the vehicle’s power demands and start-stop systems.
- Warranty length and the reputation of the brand for reliability and customer support.
- Terminal layout compatibility with existing cable harnesses and clamps to ensure secure connections.
Choosing the right 51R battery involves balancing fit, performance, climate needs, and warranty considerations to avoid early replacements.
Summary
The 51R battery is a widely used group size rather than a single model’s requirement. To know if a specific car uses a 51R, verify the battery group size on the battery label, consult the owner’s manual, or check a parts catalog using your VIN. When replacing, focus on proper fit (group size), adequate CCA for your climate, and the appropriate battery type and warranty to keep the vehicle reliable.
Are all 51R batteries the same size?
Group 51 and 51R batteries have nearly the same dimensions, typically measuring around 9.3 x 5.1 x 8.7 inches.
Can I jump start a car with a 51R battery?
BUILT-IN JUMP-STARTING
(Can also be activated manually by pressing Restart button on top of battery.) So it won't allow you to get stranded with a dead battery!
What cars have a 51R battery?
Groups 35 and 51R
It is often found in Japanese Cars and Trucks from Toyota, Nissan, Mitsubishi, Subaru, Acura, and in some older American Cars. The Group-51 Battery is found in Hondas, Nissan GTRs, and some other Japanese Cars.
What kind of battery does a 2018 Honda Civic take?
The 2018 Honda Civic battery type depends on the engine, but most models use a group size 51R or H5/Group 47 battery. Vehicles with the 1.5L engine typically require a 51R battery, while those with the 2.0L engine use an H5 (or group 47) battery. It is essential to verify the correct size and cold-cranking amps (CCA) for your specific model and trim.
| Engine | Group Size | Cold Cranking Amps (CCA) |
|---|---|---|
| 1.5L | 51R | 500 |
| 2.0L | H5 / Group 47 | 650-680 |
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Key considerations
- Group Size: Ensure you get the correct physical size (51R or H5/47) for your vehicle's battery tray and terminal placement.
- Cold Cranking Amps (CCA): This rating is crucial for starting the engine in cold weather. Match or exceed the CCA of your original battery.
- Battery Type: Both standard lead-acid and AGM (Absorbent Glass Mat) batteries are suitable for the 2018 Civic, but AGM is recommended for vehicles with a high-demand electrical system or start-stop technology.
- Verification: To be certain, it is best to check the label on your current battery or consult your owner's manual before purchasing a replacement.
