What is the difference between 187A and 187B?
3 Answers
The main differences between 187A and 187B lie in functionality, connectivity, memory, and product aspects. Below are the specific differences: Functionality: 187B supports lossless music, Bluetooth, and other features, while the original 187A does not have these functions. Connectivity: The original 187B comes with smartphone connectivity (CarPlay), whereas 187A lacks smartphone connectivity (CarPlay). Memory difference: 187B is a more modern product compared to 187A. In terms of memory alone, 187A has a smaller memory capacity and requires a memory upgrade to enable CarPlay, while 187B has a larger memory and supports CarPlay without the need for flashing. Product aspect: After continuous product iterations and development, 187A is relatively outdated in technology compared to 187B and belongs to the older product line.
Having worked on cars for so many years, I often encounter confusion between 187A and 187B. Simply put, they are both mini fuses but differ in design: 187A typically handles lower amperage, like 10-15 amps, for low-current devices such as interior lights or radios; whereas 187B is rated higher, around 15-20 amps, managing high-power components like fans or headlight systems. This distinction stems from internal material differences—187B is thicker with better heat dissipation. During installation, always refer to the fuse box location indicators: 187A is mostly in Zone C, while 187B belongs to Zone D or E. Mixing them up risks blowing fuses or causing device failures. Owners should routinely check fuse conditions using a multimeter to verify current compatibility; for older vehicles, start by replacing 187A, but opt for 187B when upgrading for stability. Never underestimate this difference—getting it wrong can lead to circuit overheating hazards, especially during long trips when headlight failure becomes critical.
As a car enthusiast, I find it quite interesting when discussing 187A and 187B with friends—the 187A is like a lightweight player, handling low-energy tasks such as controlling small lights with relatively lower current; while the 187B is the heavyweight, carrying higher current and commonly used in systems like fans or air conditioning. The difference isn’t just in amperage—in practical use, the 187B is more durable with better heat dissipation. When I upgraded my car lights, I switched to the 187B because it can handle higher power. Using the 187A by mistake caused flickering lights and wasted components. I recommend fellow car enthusiasts check their manuals or browse forums for model-specific data. For DIY projects, keep a variety of fuses in your toolkit for testing and replacement. This small detail can prevent roadside breakdowns, especially in summer when a non-working fan makes driving unbearably hot and ruins the mood.
