I replaced the front crankshaft seal on my G37 using an OEM seal from Z1 Motorsports while performing other front engine service, and I’m very satisfied with the results.
The seal itself is high quality and exactly what you’d expect from an OEM component. Fitment was precise, and it installed smoothly with no issues. It seated properly and provided an immediate, leak-free seal, which is critical for maintaining proper oil control at the front of the engine.
Since accessing the front crank seal requires a fair amount of disassembly, it makes sense to replace it while everything is apart. This is not a part you want to reuse or take chances with, and going with an OEM seal from Z1 Motorsports ensures proper fit and long-term reliability.
Z1 Motorsports handled the order well—fast shipping, secure packaging, and everything arrived in excellent condition.
Overall, it’s a small but essential component, and I’m very happy with both the quality of the part and the purchasing experience. Highly recommended for anyone doing timing or front engine service.