Can I install a higher capacity battery in my Audi A6 C5 1.9 TDI?

Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Audi A6 C5 1.9 TDI battery compartment and the positive terminal position matches.

What battery fits the Audi A6 C5 1.9 TDI?

The Audi A6 C5 1.9 TDI requires a battery with the correct capacity (Ah) and Cold Cranking Amps (CCA) for this engine. Compatible batteries offer 72-77 Ah, 680-780 A (CCA), 12 V, case H6/L3, conventional flooded technology. Browse the compatible battery list below.

How many Ah does the Audi A6 C5 1.9 TDI battery need?

The exact Ah rating for the Audi A6 C5 1.9 TDI depends on the vehicle's original electrical consumers. Compatible batteries offer 72-77 Ah, 680-780 A (CCA), 12 V, case H6/L3, conventional flooded technology. Use our finder for a precise recommendation.

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.

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Audi A6 C5 1.9 TDI

Batteries for Audi A6 C5 1.9 TDI 110 hp (diesel, 1997-2000)

All engines and prices for this model: battery Audi A6 →

Audi · A6 C5

Which battery does a Audi A6 C5 1.9 TDI need?

Specifications and battery: 1.9 TDI (110 hp)

Audi A6 C5 1.9 TDI (110 hp, diesel, 1997-2000): depending on the equipment, it takes a conventional 74 Ah, 680 A battery (278 × 175 × 190 mm) or a conventional 72 Ah, 680 A battery (278 × 175 × 175 mm). Measure your current battery before choosing. In every case the positive terminal is on the right. (AFN, AVG)

Recommended battery for this engine Car battery Varta E11 Dynamic SLI 12V 74Ah 680A €74.95 incl. VAT

View battery →

Brand: Audi
Model: A6 C5 (4B2, 4B4)
Built: 04/1997 - 10/2000
Power: 81 kW / 110 hp
Fuel: Diesel
Engine size: 1,896 cc (1.9 L)
Cylinders: 4
Body type: Saloon
Drive: Front-Wheel Drive
Engine codes: AFN, AVG

Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Depending on equipment 1	Conventional	74 Ah	680 A	278 × 175 × 190 mm	+ on the right
Depending on equipment 2	Conventional	72 Ah	680 A	278 × 175 × 175 mm	+ on the right

The same batteries also fit the 1.9 TDI (115 hp), 2.4 (136 hp), 2.4 (156 hp), 2.4 (163 hp) and 6 more engines of this model.

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

EFB, AGM or conventional for this engine?

Rule of thumb for the Audi A6 C5 1.9 TDI: 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 74 Ah.

🔧 Battery Expert Advisor

Battery analysis for your Audi A6 C5 1.9 TDI

Quick answer Depending on the equipment, your car uses one of these two main batteries. The most common option is ordinary lead-acid 74 Ah (278×175×190 mm): we recommend VARTA E11. Other units use ordinary lead-acid 72 Ah (278×175×175 mm): VARTA E43. Before buying, check the Ah on your current battery's label or measure its length.

Batteries in your Audi A6 C5 1.9 TDI

MainDepends on equipmentSee all in the list →

Measure the height of yours: 190 or 175 mm

Recommended

VARTA E11

ordinary lead-acid74 Ah680 A

278 × 175 × 190 mm

€74.95Buy

Alternative

VARTA E43

ordinary lead-acid72 Ah680 A

278 × 175 × 175 mm

€90.20Buy

Prices and availability updated on 02/11/2026

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

📋 What we found

For your Audi A6 C5 1.9 TDI we found 6 compatible batteries. This list includes 1 Start-Stop battery and 5 conventional batteries (non Start-Stop).

📏 Battery size

The list contains batteries in different sizes or capacities (Ah). In many cases both variants fit, but it's worth checking your compartment dimensions and the Ah of your original battery before buying. Choose the one with the same dimensions as your current battery: a bigger one may not fit the compartment or the hold-down. If several match your size, the higher capacity gives more headroom for cold starts.

⚡ Battery type for your vehicle

✓ Your Audi A6 C5 1.9 TDI 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.

🔋 Technology (AGM / EFB)

✓ All Start-Stop batteries in the list are EFB. They fit your car if the factory battery was EFB. If your current battery was AGM, check with us before buying: EFB cannot replace AGM.

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our recommendation

For your Audi A6 C5 1.9 TDI we recommend the VARTA E11 (ordinary lead-acid, 74 Ah). It's the battery recommended by the vehicle manufacturer for your Audi A6 C5 1.9 TDI — the OEM equivalent. Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.

Rated 4.9/5 by 76 verified customers.
Get it tomorrow if you order before 6 PM.
The best value price among compatible options.

See this battery →

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Verified selection

Class: Car Batteries
Brand: Audi
Model: A6 C5
Engine: 1.9 TDI

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.

Conventional Battery

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

5 products

Compare the technologies available for your car

A higher technology withstands more charge and discharge cycles, according to manufacturers. If your car has Start-Stop, it needs EFB or AGM.

Conventional (lead-acid) For normal use in cars without Start-Stop. from €74.95 View VARTA E11
EFB Up to 2× more cycles than a conventional battery. Good for short trips and city driving. from €95.40 +€20.45 View TUDOR TL700

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Conventional Battery	VARTA	E11	74 Ah	680 A	278×175×190 mm	Conventional	€74.95	More info
Conventional Battery	VARTA	E44	77 Ah	780 A	278×175×190 mm	Conventional	€85.40	More info
Conventional Battery	VARTA	E38	74 Ah	750 A	278×175×175 mm	Conventional	€90.20	More info
Conventional Battery	TUDOR	TA770	77 Ah	760 A	278×175×190 mm	Conventional	€81.90	More info
Conventional Battery	VARTA	E43	72 Ah	680 A	278×175×175 mm	Conventional	€90.20	More info

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.

1 product

Start-Stop battery Tudor TL700 EFB Microhybrid 12V 70Ah 760A EFB
- 12 V
- 70 Ah
- 760 A
- EFB
Dimensions 278×175×190 mm

€95.40
Compare

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Start-Stop & high energy demand batteries	TUDOR	TL700	70 Ah	760 A	278×175×190 mm	EFB	€95.40	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

: Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Audi A6 C5 1.9 TDI battery compartment and the positive terminal position matches.
: The Audi A6 C5 1.9 TDI requires a battery with the correct capacity (Ah) and Cold Cranking Amps (CCA) for this engine. Compatible batteries offer 72-77 Ah, 680-780 A (CCA), 12 V, case H6/L3, conventional flooded technology. Browse the compatible battery list below.
: The exact Ah rating for the Audi A6 C5 1.9 TDI depends on the vehicle's original electrical consumers. Compatible batteries offer 72-77 Ah, 680-780 A (CCA), 12 V, case H6/L3, 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 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. According to the manufacturer, it does not need to be registered after the change.

Batteries for Audi A6 C5 1.9 TDI 110 hp (diesel, 1997-2000)

Which battery does a Audi A6 C5 1.9 TDI need?