The Bosch S4 series is a well-regarded line of automotive batteries known for their reliability, balanced performance, and solid cold-cranking power. Designed for a broad range of vehicles without start-stop technology, the S4 series offers dependable energy supply and long service life, even in demanding weather or urban driving conditions. Manufactured using Bosch’s advanced grid technology and high-purity materials, these batteries are maintenance-free and deliver excellent resistance to deep discharge. Drivers looking for a good balance between price and performance often find the S4 series to be an ideal solution for everyday driving needs.
The Bosch S40 02 is a mid-range battery within the S4 lineup, offering a capacity of 52 Ah and a cold cranking current of 470 A, making it suitable for small to medium-sized petrol vehicles without extensive electrical equipment. This battery is a standard flooded lead-acid battery, which means it’s not designed for vehicles with start-stop systems—those require EFB or AGM technologies. The S40 02 is ideal for conventional vehicles used for daily commuting, light-duty use, and regular road conditions. It’s built to provide reliable starts, even during colder months, and supports the vehicle’s basic electronics consistently.
With dimensions of 207 mm in length, 175 mm in width, and 190 mm in height, the Bosch S40 02 fits the L1 size standard, one of the most commonly used battery sizes in Europe. This format is widely accepted across many European and Japanese vehicles and is considered a standard height design—unlike Asian batteries, which are often taller and narrower. The battery uses the B13 base hold-down system, ensuring a secure fit in many standard battery trays. Its terminal layout is 0 (positive on the right), and it features standard round terminal posts (type 1), ensuring compatibility with most mainstream vehicles.
When compared with similar batteries from other manufacturers, the Bosch S40 02 stands out for its solid balance of power and durability. For example, the Varta Blue Dynamic C22 offers the same 52 Ah and 470 A, making it a near-identical competitor. Bosch, however, is often chosen for its slightly superior resistance to corrosion and long-term performance. Other models like the Exide EB500 (50 Ah / 450 A) or Halfords HCB 012 (52 Ah / 450 A) deliver slightly less starting power. Even Exide’s premium-level EA530, while offering 53 Ah and 540 A, is often a more expensive option. Meanwhile, Bosch’s own higher-tier model, the S50 02, offers 54 Ah and 530 A for users who demand more performance.
In addition, the S40 02 is frequently praised for its accessibility, with widespread availability in Europe, and is supported by Bosch’s extensive warranty and service network. This makes it a smart choice for motorists looking for an affordable, no-fuss battery with strong cold-start capabilities and proven engineering.
In conclusion, the Bosch S40 02 is a well-rounded, mid-capacity battery that offers strong starting power, reliable daily performance, and fits most small to mid-size cars that don’t use start-stop systems. Its standard European size and widely compatible design make it an easy replacement for many OEM batteries, ensuring hassle-free installation and dependable operation throughout the year.