Choosing the right battery for your Opel Omega B, produced between 1994 and 2003, is crucial for ensuring reliable engine starts, long-term durability, and the proper functioning of the car’s electrical systems. The Omega B was offered with a variety of petrol and diesel engines, each with specific battery requirements, so it’s important to consider your engine’s needs before making a decision. Regardless of the version, one vital point to remember is that the Omega B requires a battery with a reduced height of 175mm, so always double-check the case dimensions to ensure a proper fit in the battery compartment. Failing to do so may result in installation issues, even if the technical parameters meet the car’s needs.
Most Opel Omega B models do not feature a Start-Stop system, which simplifies the selection process because traditional lead-acid batteries are fully sufficient. There is no need to choose more modern and expensive AGM or EFB batteries, unless you want to future-proof your car or expect very high electrical demand. For these vehicles, a standard lead-acid battery will provide reliable service and is recommended by most manufacturers for this generation of Omega.
If your car comes with a 2.0 or 2.0 16V petrol engine, you should look for a battery with a capacity ranging from 53Ah to 62Ah and a cold cranking current between 480A and 600A. These specifications ensure that your battery will deliver enough power for efficient starting, even in colder climates or after the car has been sitting idle for an extended period. As an example, suitable battery models include the Bosch S30 04, Bosch S40 04, Bosch S50 04, Exide EA612, Exide EB602, and Varta C11 or D21, but these are only indicative and alternatives with similar specs are also acceptable.
Moving up to the larger 2.2 16V petrol engine, the requirements are quite similar, with a slight increase in the minimum capacity to 60Ah, while still topping out at 62Ah, and a cranking current of at least 540A. Again, batteries such as the Bosch S40 04, Bosch S50 04, Exide EA612, or Varta D21 can be considered as suitable examples. It’s worth noting that these batteries are widely available in Europe and offer a good balance between price, performance, and longevity.
If you own one of the V6 petrol models, such as the 2.5 V6, 2.6 V6, 3.0 V6, or 3.2 V6, your car will benefit from a larger battery, in the range of 65Ah to 74Ah with a starting current between 540A and 750A. These engines demand more power, especially in winter, so opting for a quality battery within this specification is essential. Examples of matching models include the Bosch S30 07, S40 07, S50 07, Exide EA722, Varta E38, E43 or E9, and Lucas LP100. Again, these are just some of the many options on the market.
For diesel-powered Omegas, such as the 2.0 DTI 16V and 2.2 DTI 16V, the requirements mirror those of the V6 petrol engines, due to the high compression ratios and the need for more power to turn over a diesel engine. You’ll want a battery with at least 65Ah capacity and a cold cranking current of 540A or more. The same sample models listed above for the V6 petrol engines are suitable here.
Owners of the more powerful 2.5 DTI and 2.5 TD diesel engines need to select an even higher-capacity battery, with 80Ah to 88Ah and a cold cranking current from 700A to 800A. Diesel engines of this size can be demanding, especially in cold weather, so don’t compromise on these specifications. Example compatible batteries include Bosch S40 10, S50 10, Exide EA852, Lucas LP110, and Varta F17 or F18, but other brands with similar parameters are perfectly fine.
One interesting fact about the Omega B is that, despite its reputation as a robust executive car, the battery compartment’s relatively limited height often surprises owners and mechanics alike. This design choice was likely made to optimize under-hood space and maintain a lower center of gravity, which benefits handling. However, it makes it even more important to verify the battery’s physical dimensions before purchase—something that even professionals sometimes overlook.
Another tip is to check the battery's terminal layout before buying. Most European vehicles use a standard terminal configuration, but it’s always worth checking, as installing a battery with reversed poles or non-standard terminals can lead to cable routing issues or even short circuits.
In summary, when choosing a battery for your Opel Omega B, focus on matching the capacity (Ah) and cold cranking current (A) to your engine’s requirements, ensure the battery is lead-acid (unless you have special needs), and always check that the height does not exceed 175mm. Stick to reputable brands and, if in doubt, consult with a professional or refer to the vehicle’s manual. This approach will ensure reliable starts, long battery life, and peace of mind on every journey.
Opel Omega in version B was produced in the years 1994 – 2003. The following table presents information about batteries that match each of the engines available on the market.
Basic parameters of batteries suitable for Opel Omega (1994-2003):
| Layout | Terminal types | Base hold-down |
|---|---|---|
| 0 – positive on the right side | 1 | B13 |
Opel Omega B – petrol engines:
- 2.0
- 2.0 16V
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S3 S30 04 | 53 Ah 500 A | 242x175x175 mm | More |
| Bosch S4 S40 04 | 60 Ah 540 A | 242x175x175 mm | More |
| Bosch S5 S50 04 | 61 Ah 600 A | 242x175x175 mm | More |
| Exide Classic EC542 | 54 Ah 500 A | 242x175x175 mm | More |
| Exide Excell EB602 | 60 Ah 540 A | 242x175x175 mm | More |
| Exide Premium EA612 | 61 Ah 600 A | 242x175x175 mm | More |
| Halfords Essentials HB 075 | 56 Ah 500 A | 242x175x175 mm | More |
| Halfords Standard HCB 075 | 60 Ah 550 A | 242x175x175 mm | More |
| Lucas Premium LP065 | 53 Ah 480 A | 243x175x175 mm | More |
| Lucas Premium LP075 | 60 Ah 540 A | 243x175x175 mm | More |
| Lucas Supreme LS075 | 62 Ah 600 A | 242x175x175 mm | More |
| Varta Black Dynamic C11 | 53 Ah 500 A | 242x175x175 mm | More |
| Varta Blue Dynamic D59 | 60 Ah 540 A | 242x175x175 mm | More |
| Varta Silver Dynamic D21 | 61 Ah 600 A | 242x175x175 mm | More |
Opel Omega B – petrol engines:
- 2.2 16V
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 S40 04 | 60 Ah 540 A | 242x175x175 mm | More |
| Bosch S5 S50 04 | 61 Ah 600 A | 242x175x175 mm | More |
| Exide Excell EB602 | 60 Ah 540 A | 242x175x175 mm | More |
| Exide Premium EA612 | 61 Ah 600 A | 242x175x175 mm | More |
| Halfords Standard HCB 075 | 60 Ah 550 A | 242x175x175 mm | More |
| Lucas Premium LP075 | 60 Ah 540 A | 243x175x175 mm | More |
| Lucas Supreme LS075 | 62 Ah 600 A | 242x175x175 mm | More |
| Varta Blue Dynamic D59 | 60 Ah 540 A | 242x175x175 mm | More |
| Varta Silver Dynamic D21 | 61 Ah 600 A | 242x175x175 mm | More |
Opel Omega B – petrol engines:
- 2.5 V6
- 2.6 V6
- 3.0 V6
- 3.2 V6
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S3 S30 07 | 70 Ah 640 A | 278x175x175 mm | More |
| Bosch S4 S40 07 | 72 Ah 680 A | 278x175x175 mm | More |
| Bosch S5 S50 07 | 74 Ah 750 A | 278x175x175 mm | More |
| Exide Classic EC652 | 65 Ah 540 A | 278x175x175 mm | More |
| Exide Excell EB712 | 71 Ah 670 A | 278x175x175 mm | More |
| Exide Premium EA722 | 72 Ah 720 A | 278x175x175 mm | More |
| Lucas Premium LP100 | 72 Ah 680 A | 278x175x175 mm | More |
| Lucas Supreme LS100 | 74 Ah 750 A | 278x175x175 mm | More |
| Varta Black Dynamic E9 | 70 Ah 640 A | 278x175x175 mm | More |
| Varta Blue Dynamic E43 | 72 Ah 680 A | 278x175x175 mm | More |
| Varta Silver Dynamic E38 | 74 Ah 750 A | 278x175x175 mm | More |
Opel Omega B – diesel engines:
- 2.0 DTI 16V
- 2.2 DTI 16V
- 2.5 D
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S3 S30 07 | 70 Ah 640 A | 278x175x175 mm | More |
| Bosch S4 S40 07 | 72 Ah 680 A | 278x175x175 mm | More |
| Bosch S5 S50 07 | 74 Ah 750 A | 278x175x175 mm | More |
| Exide Classic EC652 | 65 Ah 540 A | 278x175x175 mm | More |
| Exide Excell EB712 | 71 Ah 670 A | 278x175x175 mm | More |
| Exide Premium EA722 | 72 Ah 720 A | 278x175x175 mm | More |
| Lucas Premium LP100 | 72 Ah 680 A | 278x175x175 mm | More |
| Lucas Supreme LS100 | 74 Ah 750 A | 278x175x175 mm | More |
| Varta Black Dynamic E9 | 70 Ah 640 A | 278x175x175 mm | More |
| Varta Blue Dynamic E43 | 72 Ah 680 A | 278x175x175 mm | More |
| Varta Silver Dynamic E38 | 74 Ah 750 A | 278x175x175 mm | More |
Opel Omega B – diesel engines:
- 2.5 DTI
- 2.5 TD
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 S40 10 | 80 Ah 740 A | 315x175x175 mm | More |
| Bosch S5 S50 10 | 85 Ah 800 A | 315x175x175 mm | More |
| Exide Excell EB802 | 80 Ah 700 A | 315x175x175 mm | More |
| Exide Premium EA852 | 85 Ah 800 A | 315x175x175 mm | More |
| Halfords Standard HCB 110 | 80 Ah 760 A | 315x175x175 mm | More |
| Lucas Premium LP110 | 80 Ah 800 A | 317x175x175 mm | More |
| Lucas Supreme LS110 | 88 Ah 800 A | 317x175x175 mm | More |
| Varta Blue Dynamic F17 | 80 Ah 740 A | 315x175x175 mm | More |
| Varta Silver Dynamic F18 | 85 Ah 800 A | 315x175x175 mm | More |
If you’re still unsure which battery fits your Opel Omega , or if you want to help others in their selection, please send us a photo of your current battery in the comment section at the bottom of the page. You can also send the picture to contact@whatbattery.co.uk (we will place it in the comments to also help other users). Be sure to specify the car model, year, type, as well as the engine capacity and power. We’ll do our best to assist you!