Batteries for Buick Electra 3.8 173 hp (petrol, 1990-1991)
Which battery does a Buick Electra 3.8 need?
Specifications and battery: 3.8 (173 hp)
Buick Electra 3.8 (173 hp, petrol, 1990-1991) takes a 44 Ah, 730 A AGM battery (237 × 172 × 197 mm), with the positive terminal on the left.
- Brand
-
Buick
- Model
- Electra
- Built
- 10/1990 - 09/1991
- Power
- 127 kW / 173 hp
- Fuel
- Petrol
- Engine size
- 3,791 cc (3.8 L)
- Cylinders
- 6
- Body type
- Saloon
- Drive
- Front-Wheel Drive
- Engine codes
- L27
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Main | AGM | 44 Ah | 730 A | 237 × 172 × 197 mm | + on the left |
The same batteries also fit the 3.0 (110 hp), 3.8 (140 hp), 3.8 (228 hp) and 4.3 D (86 hp) engines of this model.
Data: vehicle specifications and the battery manufacturer's application catalogue.
Battery analysis for your Buick Electra 3.8
Quick answer You need an AGM battery of 44 Ah. Our recommendation: OPTIMA RTU-3.7.
Prices and availability updated on 23/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your Buick Electra 3.8 we found 1 compatible Start-Stop battery.
⚡ Battery type for your vehicle
✓ Your Buick Electra 3.8 uses the Start-Stop system. Every battery shown is compatible — no conventional options to confuse you.
🔋 Technology (AGM / EFB)
✓ All Start-Stop batteries in the list are AGM. If your current battery is AGM, this is the right replacement. If it is EFB, an AGM is also a valid upgrade, but on cars with battery management (BMW, Mercedes, VAG group…) it must be registered and coded for the new technology with a diagnostic tool; otherwise the car keeps charging it as an EFB.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your Buick Electra 3.8 it's the recommended battery: OPTIMA RTU-3.7. Its specs: AGM technology, 44 Ah capacity, 730 CCA cranking power, 237×172×197 mm dimensions.
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Verified selection
- Class: Car Batteries
- Brand: Buick
- Model: Electra
- Engine: 3.8
Start-Stop & high energy demand batteries
AGM or EFB battery for start-stop vehicles and for cars with high energy demand (many electrical consumers, frequent starts). More charge cycles, better charge recovery and longer service life.
This engine comes with an AGM/EFB battery as standard: the car's charging system requires it even without Start-Stop. If in doubt, message us and we will confirm.
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Start-Stop & high energy demand batteries | OPTIMA | RTU-3.7 | 44 Ah | 730 A | 237×172×197 mm | AGM ESPIRAL | €187.30 | More info |
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Chargers
Chargers for your battery
Frequently asked questions
- Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Buick Electra 3.8 battery compartment and the positive terminal position matches.
- The Buick Electra 3.8 requires a battery with the correct capacity (Ah) and Cold Cranking Amps (CCA) for this engine. Compatible batteries offer 44 Ah, 730 A (CCA), 12 V, case 75/25 (BCI), conventional flooded technology. Browse the compatible battery list below.
- The exact Ah rating for the Buick Electra 3.8 depends on the vehicle's original electrical consumers. Compatible batteries offer 44 Ah, 730 A (CCA), 12 V, case 75/25 (BCI), conventional flooded technology. Use our finder for a precise recommendation.
- You need the make, model and engine. If your car has Start-Stop (the engine switches off at traffic lights), it needs an EFB or an AGM battery, depending on what it came with: if it has an AGM, fit another AGM; if it has an EFB, another EFB or an AGM. On cars with battery management (BMW, Mercedes, VAG group…), moving from EFB to AGM requires coding the new battery. Without Start-Stop, a conventional battery is fine, or an EFB or AGM if you want a longer life.
- A conventional (lead-acid) battery is for cars without Start-Stop. An EFB is a reinforced conventional battery for basic Start-Stop. An AGM offers the highest performance and is fitted as standard on cars with advanced Start-Stop, regenerative braking or high electrical demand. Replacement rule: an AGM only with another AGM; an EFB with another EFB or an AGM; a conventional battery with any of the three. Never move down in technology.
- Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
- All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
- Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.
- In mainland Spain and Portugal delivery takes 24 working hours if you order before 6:00 pm and the battery is in stock; for the Balearic Islands and other EU destinations allow 2 to 5 days. Batteries are shipped fully charged and ready to install.
Guides
-
This vehicle has no Start-Stop. According to the manufacturer, it does not need to be registered after the change.