MADE IN THE USA!
Free ShippingProduct Specifications for Mazda MIATA Battery - Group U1R AGM
| BM Part #: | MAR-8AM-U1R |
|---|---|
| Made In: | U.S.A. |
| Voltage: | 12 Volt |
| Cold Cranking Amps: | 320 CCA |
| Capacity: | 25 Ah |
| Type: | AGM |
| Battery Size: | Group U1R |
| Length: | 7 3/4" |
| Width: | 5 1/8" |
| Height: | 7 1/4" |
| Shipping Weight: | 25.45Lbs |
| Warranty: | 1 Year |
- Made in the USA. Why it matters:
- Superior craftsmanship; rigorously tested; high-quality parts.
- ✅ OEM Fit: Exact dimensions for 1990–2005 Mazda Miatas with trunk-mounted battery and correct polarity.
- ❌ Not for under-hood models; check your Miata’s battery location before ordering.
- Fully charged and ready to install: No setup, no waiting.
- Sealed AGM design: Spillproof, leakproof, and maintenance-free.
- Vibration resistant: Reliable performance in all driving conditions.
- Eco-friendly: 100% recyclable, safe, and clean battery solution.
- Includes vent ports: For 1/4" OD vacuum tubing for proper trunk ventilation.
- BCI Group U1 size: Compact, powerful, perfect for tight Miata trunk spaces.
- Direct replacement: Replaces Panasonic S46A24L (may require minor installation adjustments).
- Proven Power: 320 CCA ensures confident starts in cold or hot weather.
Product Description
Mazda Miata Battery - Group U1R AGM Premium Replacement
Perfect for daily driving, spirited weekend runs, or track events, this AGM Miata battery delivers consistent power and fits the factory tray without modification. It’s a direct replacement for the factory Panasonic S46A24L and equivalent to other U1R AGM Miata batteries. See our full compatibility chart below to confirm fitment for your specific year and model.
Compatibility: Fits 1990–1997 Mazda MX-5 Miata (NA) and 1999–2005 Mazda MX-5 Miata (NB) with trunk-mounted battery configuration. Will not fit under-hood battery setups.
Upgrade your Miata's reliability and keep the fun going mile after mile. This AGM U1R battery combines OEM fit, modern technology, and enthusiast-approved performance for your classic roadster.
Our replacement Miata batteries are sealed, maintenance free AGM rechargeable batteries.Due to their construction, they do not require any ventilation, can be mounted in any orientation, and do not require maintenance.
The battery features two vent tubes to attach your original vent hoses.These are not required for installation, but are offered to give you a place to attach your original hoses.Some modification may be necessary.
Frequently Asked Questions
Q: What size battery does a Mazda Miata (1990–2005) use?
A: Most 1990–2005 Mazda Miatas with trunk-mounted batteries use a Group U1R battery, measuring approximately 7.75" L × 5.13" W × 7.25" H.
Q: Is this Miata battery the same as the OEM Panasonic S46A24L?
A: Yes! This AGM Mazda Miata battery is a direct replacement for the Panasonic S46A24L. Minor installation adjustments may be required.
Q: What’s the best battery for an NA or NB Miata?
A: An AGM Group U1R battery is ideal for trunk-mounted Miatas because it’s sealed, spillproof, and maintenance-free, making it safe for interior mounting.
Q: Does this Miata battery (MAR-8AM-U1R) come with vent tubes?
A: Yes — it includes vent ports compatible with 1/4" OD vacuum tubing for proper trunk ventilation.
Q: How do I know if my Miata has a trunk-mounted battery?
A: NA (1990–1997) and NB (1999–2005) Miatas typically have the battery mounted in the trunk. Check before ordering, as some models have aftermarket under-hood setups.
Q: Can I use a lithium battery in my Mazda Miata?
A: Yes. Some owners upgrade to lithium for weight savings, but AGM is the most common choice for OEM fit and reliability.
Q: How long does a Miata AGM battery last?
A: With proper care and use, an AGM Mazda Miata battery can last 4–6 years or longer. Lifespan will depend on factors like driving habits, climate conditions, and how well the battery is maintained over time.
Cross Reference & Compatibility
Compatible Models:
This AGM Group U1R battery fits all Mazda MX-5 Miata NA (1990–1997) and NB (1999–2005) models with trunk-mounted batteries. It’s the direct OEM-size replacement for the Panasonic S46A24L battery, measuring 7.75" L × 5.13" W × 7.25" H. Not for under-hood battery conversions.
- YearsMakeModelEngine
- 1990MazdaMX-5 MiataL4 1.6L
- 1991MazdaMX-5 MiataL4 1.6L
- 1992MazdaMX-5 MiataL4 1.6L
- 1993MazdaMX-5 MiataL4 1.6L
- 1994MazdaMX-5 MiataL4 1.8L
- 1995MazdaMX-5 MiataL4 1.8L
- 1996MazdaMX-5 MiataL4 1.8L
- 1997MazdaMX-5 MiataL4 1.8L
- 1998MazdaMX-5 MiataL4 1.8L
- 1999MazdaMX-5 MiataL4 1.8L
- 2000MazdaMX-5 MiataL4 1.8L
- 2001MazdaMX-5 MiataL4 1.8L
- 2002MazdaMX-5 MiataL4 1.8L
- 2003MazdaMX-5 MiataL4 1.8L
- 2004MazdaMX-5 MiataL4 1.8L
- 2005MazdaMX-5 MiataL4 1.8L
OEM & Aftermarket Battery Numbers This Replaces:
This U1R AGM Miata battery is a direct replacement for many OEM and aftermarket part numbers, including Panasonic S46A24L, Deka 8AMU1R, Interstate MT-MX-5, Duracell SLIU1RT, NAPA 7581R, and more. If your current battery matches any of the part numbers below, this is the correct fit for your 1990–2005 Mazda MX-5 Miata with a trunk-mounted battery.
- AAA MIATA-C
- Astrolite 8AMU1R
- AutoPride APU1RM
- Batteries Plus SLIMU1R-PRM
- Bosch S5584B
- Canadian Tire MOT46A24L
- Carquest 8AMU1R
- Deka 8AMU1R
- Duracell AGMU1P
- Duracell SLIU1RT
- Exide MIATA-60
- Federated APU1RM
- Ferguson 8AMU1R
- Fisher APU1RM
- Interstate MT-MX-5
- Magna Power MPS46A24L
- Mighty MIATAP
- MotoMasher MOT46A24L
- NAPA 7581R
- NAPA 8AMU1R
- NAPA M-320
- Parts Master APU1RM
- Parts Plus MIATAS
- Perfect Start MIATA
- Resource Power APU1RM
- SuperStart MIATA
- Truck Pride APU1RM
- World Source One (WSO) AMU1R
Customer Reviews
Ezpz
The only dealer I know of that has the OEM style battery for my NB Miata. It has the reversed polarity, the AGM electrolyte as the OEM, the tube connections that allow the gases to escape, and the exact size that fits the space.
Battery was delivered quickly.
For a woman it was the easiest battery I've ever bought. Id recommend you try this company. My
brother reccomended it.
So far no worries . Battery installed easy.
Perfect replacement. Great service.
Purchased agm, vented battery for my 99 Miata. The fit was great. Saved about $50 over all auto stores I checked. Have only had 2 months but so far no issue. I didn't have to turn on a core and there was no core charge.
I purchased the battery based on information from positive reviews. It is also an American made product. Even though I paid regular price, it was still less expensive than batteries from local auto parts stores. I am impressed with the ease of installation (vent tunes included) and the power right out of the box.
Bought this for my husband's Miata when the battery finally went kaput, shipping was fast and price was reasonable.
Overall very satisfied with the purchase. 👍
