How to Identify Car Bulb Models?
5 Answers
There are several methods to identify car bulb models: 1. Bulb base: Check the bulb removed from your car, as the specific model number is usually marked at the base of the bulb. The headlight assembly may also have markings such as H1–H7. 2. Maintenance manual: Refer to the vehicle's maintenance manual. Most models list bulb specifications in the consumable parts section. Provide the vehicle model and year to the seller for assistance. Below are relevant introductions: 1. H1: H1-base car front fog light, with a power of 55W, bulb diameter of 8.5mm, total length of 62.5mm, and base type P14.5s. 2. H3: H3-base car front fog light, with a power of 55W, bulb diameter of 11.5mm, total length of 42.0mm, and base type PK22s. 3. H4: H4-base car front fog light, with a power of 60/55W, bulb diameter of 17.0mm, total length of 92.0mm, and base type P43t-38. 4. H7: H7-base car front fog light, with a power of 55W, bulb diameter of 11.0mm, total length of 57.0mm±2.0, and base type PX26d.
When I replaced bulbs before, I would directly check the markings on the old bulb. Usually, the metal base is engraved with a model number consisting of letters and numbers, such as H4 or H7. If it's hard to read, I take a photo with my phone and send it to the customer service at an auto parts store or on Taobao—they usually tell me the correct model right away. If I still can't find it, I flip to the back section of the user manual, which has a headlight bulb specification table with clear details. Remember to also check if the wattage and voltage match—I once bought the wrong one, and while it was extremely bright, its lifespan was very short. Actually, the easiest method is to remove the bulb and bring it directly to the seller for matching—that's the most accurate way to avoid hassle.
I've found there are several ways to identify bulb models. The most straightforward method is to open the hood, locate the headlight assembly, and remove the old bulb to check its markings, which are usually printed on the bulb base or glass casing. Additionally, the vehicle manual provides detailed specifications, typically found in the maintenance section. Online shopping platforms have also become quite intelligent nowadays - by entering the VIN or selecting the specific vehicle model and year, the system will automatically recommend compatible bulb models. I often use this method as it saves time and effort. However, it's important to note that bulb specifications vary significantly between different vehicle models. For instance, halogen bulbs and LED bulbs are not interchangeable, and choosing the wrong type may cause electrical issues or even blow fuses.
Last time I changed a bulb by myself, I relied on my phone. First, remove the faulty bulb and carefully check the characters printed on the base—some alphanumeric combinations are internationally standardized models. If it's too rusted to read, simply use your phone's image recognition feature to take a photo and upload it to a shopping app, which can automatically identify the model. Alternatively, note down the last 7 digits of the VIN and check the original parts parameters at a 4S shop—this is the safest approach. Nowadays, many bulbs also come in single-prong or double-prong types, so remember to compare the socket shapes. I once bought the wrong one and couldn’t even install it. When shopping online, it's best to choose sellers that support vehicle model matching—enter your brand, engine displacement, and year, and the system will automatically filter out incompatible models.
A veteran car enthusiast shared his experience in identifying bulb models with me: First, remove the bulb by hand—the model letters are usually engraved near the metal base. Second, check the manual, as most car manuals include a parts specification table. Third, look inside the fuse box cover on the car, as some models have bulb parameter labels pasted there. I’ve tried searching on Taobao by car model—entering "2015 Camry low beam" will bring up matching models. But be careful not to blindly trust customer service recommendations; once, they suggested the wrong wattage, and the light housing ended up warped from overheating. Now, I always buy replacement bulbs from the same brand as the original. I take a photo of the old bulb and send it to the seller for verification—it takes an extra five minutes but ensures a 100% match.
