What battery model is used for the Passat?
3 Answers
Different configurations of the Passat use different battery models. Below are the details: 1. Mid to low-end models are equipped with a VARTA 12V-280A-60AH battery. 2. High-end models are equipped with a VARTA 12V-380A-72AH battery. Here are some tips for battery maintenance: (1) Avoid parking the car in an open parking lot for extended periods. If long-term parking is necessary, remove the battery to prevent freezing damage. (2) In winter, the car engine may be harder to start. Each attempt to start the engine should not exceed 5 seconds, with intervals of at least 15 seconds between attempts. If the engine fails to start after multiple attempts, check other aspects such as the electrical circuit, ignition coil, or fuel system. Avoid continuous attempts to start, as this can lead to battery damage due to excessive discharge. (3) Regularly charge the car battery. A battery left unused will gradually discharge on its own and eventually become unusable. Therefore, start the car periodically to recharge the battery. (4) Clean the battery terminals periodically and apply specialized grease to protect the wiring harness. Regularly inspect the battery components and connecting wires. (5) Avoid using car electronics after the engine is turned off. Using the battery alone when the engine is not generating power can cause damage.
My old Passat B7 had its battery replaced last year, originally equipped with a Varta H6 start-stop battery, model number 57512. The mechanic said that cars with start-stop function must use EFB or AGM batteries, as regular batteries can't handle frequent starts. Later, I checked and found that batteries like Bosch S5 (580901083) and Fengfan 6-QW-70 (720A) are compatible. However, you need to pay attention to the battery capacity; 2.0T models generally require 70AH or more. If you replace it yourself, you need to connect a backup power source first, otherwise, the car's computer will lose power, and the window controls and dashboard settings might go haywire. Nowadays, start-stop batteries are really expensive—Varta costs over 1300, while regular batteries can be done for just 300-400.
Just replaced the battery for my 2017 Passat and did thorough research. The original battery label shows model L2-400, which is actually a 70AH EFB battery. The key specification is cold cranking amps (CCA) - Volkswagen requires at least 680CCA. Recommended option is VARTA Blue Dynamic EFB (model 6-QFX-70), which fits perfectly in the battery tray. For frequent short-distance driving, choose one with high charging efficiency. I ended up buying a Camel EFB-70 for just over 800 RMB including installation. Remember to maintain power during replacement - the mechanic used a power relay to protect the ECU, otherwise you'll need to reactivate the infotainment system.
