What battery fits the Subaru Rex III 0.5 Kompressor?

Subaru REX III 0.5 Kompressor (61 hp, petrol, 1989-1990) takes a conventional 45 Ah, 330 A battery (238 × 129 × 227 mm), with the positive terminal on the right. Compatible batteries offer 45 Ah, 330 A (CCA), 12 V, case B24, conventional flooded technology. Browse the compatible battery list below.

Does the Subaru Rex III 0.5 Kompressor need an AGM or EFB battery?

If your Subaru Rex III 0.5 Kompressor 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?

To find the exact battery you need, you need to know the make, model, and engine. If your car has a Start-Stop system (the engine shuts off at traffic lights), you need an AGM or EFB battery. An AGM battery can only be replaced with another AGM battery. However, an EFB battery can be replaced with either another EFB or an AGM battery, as the latter is superior.

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

The standard battery is the conventional type. The EFB battery withstands start/stop cycles better. The AGM battery is the most durable and is mandatory in cars with Start-Stop and regenerative braking. Never replace an AGM battery with an EFB or standard battery.

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.

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Subaru REX III 0.5 Kompressor

Batteries for Subaru REX III 0.5 Kompressor 61 hp (petrol, 1989-1990)

Subaru · REX III

Which battery does a Subaru REX III 0.5 Kompressor need?

Specifications and battery: 0.5 Kompressor (61 hp)

Subaru REX III 0.5 Kompressor (61 hp, petrol, 1989-1990) takes a conventional 45 Ah, 330 A battery (238 × 129 × 227 mm), with the positive terminal on the right.

Brand: Subaru
Model: REX III
Built: 06/1989 - 07/1990
Power: 45 kW / 61 hp
Fuel: Petrol
Engine size: 547 cc (0.5 L)
Cylinders: 4
Body type: Hatchback
Drive: Front-Wheel Drive
Engine codes: EN05

Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Main	Conventional	45 Ah	330 A	238 × 129 × 227 mm	+ on the right

The same batteries also fit the 0.5 (38 hp), 0.5 4WD (38 hp), 0.7 (64 hp), 0.7 (48 hp) and 3 more engines of this model.

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

🔧 Battery Expert Advisor

Battery analysis for your Subaru REX III 0.5 Kompressor

Quick answer You need an Lead-acid battery of 45 Ah. Our recommendation: VARTA B31.

VARTAB31

Lead-acid45 Ah330 A238×129×227

€47.60

Buy

Prices and availability updated on 20/10/2026

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

📋 What we found

For your Subaru REX III 0.5 Kompressor we found 3 compatible conventional (non Start-Stop) batteries.

⚡ Battery type for your vehicle

✓ Your Subaru REX III 0.5 Kompressor does not need a Start-Stop battery. The conventional ones shown fit your vehicle and are the most affordable option. If you want a higher-quality, longer-lasting battery, you can also fit an EFB or AGM as an upgrade — they are fully compatible and last more years.

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our recommendation

For your Subaru REX III 0.5 Kompressor we recommend the VARTA B31 (Lead-acid, 45 Ah). It's the battery recommended by the vehicle manufacturer for your Subaru REX III 0.5 Kompressor — the OEM equivalent. It also offers the highest capacity (Ah) and the highest cranking power (CCA) on the list — more headroom in cold starts and with many consumers. Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.

Next-day delivery if you order before 6 PM.

See this battery →

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Verified selection

Class: Car Batteries
Brand: Subaru
Model: REX III
Engine: 0.5 Kompressor

Order now with express shipping: your product ships tomorrow and arrives on Thursday before 2 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 — Start-Stop requires AGM or EFB)
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.

Conventional Battery

This is a standard or conventional battery for vehicles without a start-stop system

3 products

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Price
Conventional Battery	VARTA	B31	45 Ah	330 A	238×129×227 mm	€47.60	More info
Conventional Battery	TUDOR	TB456	45 Ah	330 A	237×127×227 mm	€71.90	More info
Conventional Battery	EXIDE	EB456	45 Ah	330 A	237×127×227 mm	€83.20	More info

Complete your purchase

Chargers

Chargers for your battery

1 product

Battery charger ABSAAR Pro4.0 6/12V 4A Smart Charger
- 6 V
€50.60

Frequently asked questions

: Subaru REX III 0.5 Kompressor (61 hp, petrol, 1989-1990) takes a conventional 45 Ah, 330 A battery (238 × 129 × 227 mm), with the positive terminal on the right. Compatible batteries offer 45 Ah, 330 A (CCA), 12 V, case B24, conventional flooded technology. Browse the compatible battery list below.
: If your Subaru Rex III 0.5 Kompressor has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.
: To find the exact battery you need, you need to know the make, model, and engine. If your car has a Start-Stop system (the engine shuts off at traffic lights), you need an AGM or EFB battery. An AGM battery can only be replaced with another AGM battery. However, an EFB battery can be replaced with either another EFB or an AGM battery, as the latter is superior.
: The standard battery is the conventional type. The EFB battery withstands start/stop cycles better. The AGM battery is the most durable and is mandatory in cars with Start-Stop and regenerative braking. Never replace an AGM battery with an EFB or standard battery.
: 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 uses a conventional flooded battery: no BMS registration is required, the alternator will charge it directly.

Batteries for Subaru REX III 0.5 Kompressor 61 hp (petrol, 1989-1990)

Which battery does a Subaru REX III 0.5 Kompressor need?