Choosing the right battery for your Mazda MX-5 I NA (1990-1998) is essential for ensuring reliable starts, optimal performance, and the longevity of various electrical systems in your iconic roadster. When selecting a battery, it’s important to consider several factors such as engine size, the presence or absence of a Start-Stop system, fuel type, battery capacity and current specifications, as well as the battery mounting type. For the Mazda MX-5 I NA, both the 1.6 and 1.8-liter petrol engines produced between 1990 and 1998 do not feature a Start-Stop system, which simplifies your selection somewhat.
The recommended battery for both engine variants is one with a capacity of 45Ah (ampere-hours), which is particularly well-matched to the needs of these engines and their electrical systems. The cold cranking amps (CCA), which is the measure of the battery’s ability to start the engine in cold conditions, should fall between 330A and 390A. This range is sufficient not only for reliable cold starts but also for supporting additional electrical demands that may arise from components such as headlights, audio systems, and other accessories. Importantly, the chosen battery type should be a traditional lead-acid battery, as this technology is proven, cost-effective, and fully compatible with the electrical system of the first-generation Mazda MX-5.
One particularly distinctive aspect of the MX-5 NA’s battery requirements is the mounting type. While most modern cars use the B13 mounting system, the MX-5 NA uses the less common B0 type. This difference means that many commonly available batteries might not fit securely in the battery tray without modification or additional mounting hardware. Therefore, it is crucial to pay close attention to the mounting specification when purchasing a replacement battery. Choosing a battery with the correct B0 mounting ensures not only a secure fit but also the proper operation of the vehicle’s electrical system and safety features.
There are several example battery models that fit the Mazda MX-5 I NA’s requirements, including the Bosch S40 21, Exide EB454, Lucas LP053, and Varta B32. These are just representative examples of batteries that meet the necessary criteria in terms of capacity, cold cranking amps, and mounting compatibility. If you choose one of these, you can be confident that the battery will perform well in your MX-5. However, it’s always advisable to check the latest catalogues or consult with a professional to ensure that the specific model is still available and best suited for your car.
One interesting detail about the Mazda MX-5 NA is its unique placement of the battery. Unlike many cars that have the battery mounted in the engine bay, the MX-5 NA has its battery installed in the trunk. This decision by the engineers was aimed at achieving better weight distribution and, consequently, improved handling—a key aspect of the car’s legendary driving dynamics. As a result, it’s particularly important to ensure that the battery is a sealed type (even if it’s a lead-acid battery), to prevent any potential acid leaks in the trunk, which could cause corrosion or damage to the car's structure and luggage. Some enthusiasts even opt for AGM (Absorbent Glass Mat) batteries, which are a type of sealed lead-acid battery, for an extra peace of mind, although this is not strictly necessary if you stick to the standard recommendations.
When replacing the battery, it’s good practice to inspect the battery tray for any signs of corrosion and to ensure that the ventilation tube (if present) is correctly attached and routed outside the trunk. This step can help prevent any buildup of gases and minimize the risk of corrosion over time. Additionally, the battery terminals should be clean and free from oxidation to guarantee a reliable electrical connection.
In summary, the ideal battery for your Mazda MX-5 I NA from 1990 to 1998 should be a 45Ah lead-acid battery with a cold cranking current of 330 to 390 amps and, crucially, a B0 mounting type. Example models like the Bosch S40 21, Exide EB454, Lucas LP053, and Varta B32 can serve as a helpful guide when shopping for a replacement. Paying attention to these details will ensure that your beloved roadster stays as spirited and dependable as ever on the open road.
Mazda MX-5 I in version NA was produced in the years 1990 – 1998. Below we present the specifications of batteries suitable for specific engines.
Basic parameters of batteries suitable for Mazda MX-5 I (1990-1998):
| Layout | Terminal types | Base hold-down |
|---|---|---|
| 0 – positive on the right side | 1 | B0 |
Mazda MX-5 I NA – petrol engines:
- 1.6
- 1.8
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 S40 21 | 45 Ah 330 A | 238x129x227 mm | More |
| Exide Excell EB454 | 45 Ah 330 A | 237x127x227 mm | More |
| Lucas Premium LP053 | 45 Ah 390 A | 234x128x220 mm | More |
| Varta Blue Dynamic B32 | 45 Ah 330 A | 238x129x227 mm | More |
If you’re still unsure which battery fits your Mazda MX-5 I , or if you want to help others in their selection, please send us a photo of your current battery in the comment section at the bottom of the page. You can also send the picture to contact@whatbattery.co.uk (we will place it in the comments to also help other users). Be sure to specify the car model, year, type, as well as the engine capacity and power. We’ll do our best to assist you!