Does the Bmw 3 Convertible 325 D need an AGM or EFB battery?

If your Bmw 3 Convertible 325 D has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.

What type of battery does my car need?

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.

What is the difference between AGM, EFB and standard batteries?

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.

How do I find the right battery for my vehicle?

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.

What warranty do the batteries have?

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.

How long does it take for the battery to arrive?

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.

12,425 customer reviewsThank you for trusting us!Thank you! Excellent 4.5 out of 5

BMW 3 Convertible 325 d

Batteries for BMW 3 Convertible 325 d 211 hp (diesel, 2007-2010)

All engines and prices for this model: battery BMW 3 Series →

BMW · 3 Convertible

Which battery does a BMW 3 Convertible 325 d need?

Specifications and battery: 325 d (211 hp)

BMW 3 Convertible 325 d (211 hp, diesel, 2007-2010) uses a 82 Ah, 800 A AGM battery (315 × 175 × 190 mm), with the positive terminal on the right. A conventional battery is enough; for a longer life, an EFB or AGM with the same dimensions also works.

Recommended battery for this engine Start-Stop battery Exide EK820 12V 82Ah 800A AGM €119.20 incl. VAT

View battery →

Brand: BMW
Model: 3 Convertible (E93)
Built: 03/2007 - 2010
Power: 155 kW / 211 hp
Fuel: Diesel
Engine size: 2,993 cc (3 L)
Cylinders: 6
Body type: Convertible
Drive: Rear-Wheel Drive
Engine codes: M57 D30 (306D3)
Start-Stop battery: Not required

Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Main	AGM	82 Ah	800 A	315 × 175 × 190 mm	+ on the right

Data: vehicle specifications and the battery manufacturer's application catalogue.

EFB, AGM or conventional for this engine?

Rule of thumb for the BMW 3 Convertible 325 d: fit the same technology as the original or better (conventional → EFB → AGM), with equal or higher capacity and cold cranking amps, and respect the size and terminal position of around 82 Ah.

🔧 Battery Expert Advisor

Battery analysis for your BMW 3 Convertible 325 d

Quick answer You need an AGM battery of 82 Ah. Our recommendation: EXIDE EK820.

EXIDEEK820

AGM82 Ah800 A315×175×190

€119.20

Buy

Prices and availability updated on 09/11/2026

Based on the batteries we found for your vehicle, our experts help you pick the right one.

📋 What we found

For your BMW 3 Convertible 325 d we found 4 compatible Start-Stop batteries.

⚡ Battery type for your vehicle

Your BMW 3 Convertible 325 d has no Start-Stop, but the manufacturer fits an AGM or EFB battery as standard because the charging system requires it. Choose one with the same technology.

🔋 Technology (AGM / EFB)

Do you know whether your car's current battery is AGM or EFB?

Check your battery label: "AGM" or "VRLA" means AGM; "EFB" means EFB. If it says neither, it is probably conventional: on a Start-Stop car, ask us before buying. Never fit a conventional battery on a Start-Stop car, nor an EFB where an AGM was fitted.

Where do I check if my battery is AGM or EFB?

Can I fit an AGM if my car had EFB?

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our recommendation

For your BMW 3 Convertible 325 d we recommend the EXIDE EK820 (AGM, 82 Ah). It's one of the most installed references on this type of vehicle.

Rated 5.0/5 by 2 verified customers.
Get it tomorrow if you order before 6 PM.
The best value price among compatible options.

See this battery →

Was this advisor helpful?

Verified selection

Class: Car Batteries
Brand: BMW
Model: 3 Convertible
Engine: 325 d

Receive them tomorrow before 5 PM if you order before 6 PM (Spain mainland and Portugal only).

Before you buy: check 3 key points

Although the batteries shown are sourced from information provided by manufacturers, we recommend checking on your current battery:

Dimensions (length × width × height, including terminals and protrusions)
The dimensions shown are the maximum of the battery and include the height of the terminals, small ridges at the base and any lateral protrusions. Measure your current battery completely, from edge to edge. The new one must be the same size or slightly smaller — never larger, it would not fit in the housing.
Positive terminal (left or right viewed from the front — check the battery photo carefully)
Stand facing the battery, with the manufacturer's label facing you and the terminals on top. Locate the terminal marked with +: if it is on your right, it is "positive right"; if it is on your left, it is "positive left". Do not rely on how the battery is mounted in the car — the position is always measured looking only at the battery itself.
Technology (AGM, EFB or conventional — the same as your current battery or higher)
Depending on the manufacturer, the same technology may be labelled differently: AGM may also appear as VRLA, AGM Start-Stop or AGM Deep Cycle. EFB may appear as EF, EFB+ or Enhanced Flooded Battery. Conventional may appear as SLI, Lead-Acid, Wet or Standard. If your vehicle has Start-Stop, the battery must be AGM or EFB — never conventional.

If you have any questions, just ask us and we'll be glad to advise you with no obligation.

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.

4 products

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.

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Start-Stop & high energy demand batteries	EXIDE	EK820	82 Ah	800 A	315×175×190 mm	AGM	€119.20	More info
Start-Stop & high energy demand batteries	VARTA	A6	80 Ah	800 A	315×175×190 mm	AGM	€160.45	More info
Start-Stop & high energy demand batteries	TUDOR	TK820	82 Ah	800 A	315×175×190 mm	AGM	€121.30	More info
Start-Stop & high energy demand batteries	VARTA	N80	80 Ah	800 A	315×175×190 mm	EFB	€126.30	More info

Complete your purchase

Chargers

Chargers for your battery

1 product

Battery charger ABSAAR Pro4.0 6/12V 4A Smart Charger
- 6 V
€56.95

Frequently asked questions

: BMW 3 Convertible 325 d (211 hp, diesel, 2007-2010) uses a 82 Ah, 800 A AGM battery (315 × 175 × 190 mm), with the positive terminal on the right. A conventional battery is enough; for a longer life, an EFB or AGM with the same dimensions also works. Compatible batteries offer 80 Ah, 800 A (CCA), 12 V, case H7/L4, conventional flooded technology. Browse the compatible battery list below.
: If your Bmw 3 Convertible 325 D has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.
: 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 delivery takes 24-48 working hours if you order before 6:00 pm (Monday to Friday) and the battery is in stock; mainland Portugal takes 1 to 4 working days, the Balearic Islands 2 to 5 working days and other EU destinations 4 to 7 working days. Batteries are shipped fully charged and ready to install.

Guides

: This vehicle has no Start-Stop. The manufacturer requires the new battery to be registered via OBD with a diagnostic tool and, if you change technology (EFB → AGM), coded; without this step it lasts much less.

Batteries for BMW 3 Convertible 325 d 211 hp (diesel, 2007-2010)

Which battery does a BMW 3 Convertible 325 d need?