2005-2013 BMW 323i 325i 523i 525i X3 Z4 2.5L N52 Engine Head Gasket Set with Valve Stem Seals

This 2.5L engine head gasket kit is designed for select BMW models equipped with N52B25, N52B25A, N52NB25A, or N52KB25 engines. It includes the cylinder head gasket, valve cover gasket set, valve stem seals, manifold gaskets, oil pan gasket, and other sealing components required for the listed applications.

Product Features

• Designed for BMW 2.5L N52 engine applications.
• Multilayer stainless steel head gasket helps improve sealing performance and resist heat and deformation.
• OE-equivalent materials designed to meet or exceed original equipment specifications.
• Includes gaskets, seals, and O-rings for cylinder head replacement.
• Professional installation is recommended.

OE / Reference Numbers

52257800, 50275900, 11127555310, 7555310, 11127555755, 7555755, 512.270, 10176400, 11127526040, 7526040, 11127529351, 7529351, 11127536785, 7536785, 11127581215, 7581215, 534.310, 11340034068, 0034068, 364.500, 660.360, 11340034055, 0034055, 11340034069, 0034069, 11340035853 0, OS32357

Engine Applications

• N52B25
• N52B25A
• N52NB25A
• N52KB25

Package Includes

• 1 × Cylinder Head Gasket
• 1 × Valve Cover Gasket Set
• 24 × Valve Stem Seal Set
• 6 × Exhaust Manifold Gasket
• 6 × Intake Manifold Gasket Set
• 1 × Lower Gasket Set with Oil Pan Gasket
• Other Small Gaskets, Seals, and O-Rings

Important Notes

• Please verify that the part numbers of your existing head gasket set match the numbers listed above.
• Confirm the vehicle model, chassis, engine code, and engine size before ordering.
• Installation instructions are not included.
• Professional installation is recommended.

Warranty

24-Month Warranty

The supplied product information includes a 24-month warranty. If the gasket develops faults, cracks, or stops functioning properly, please contact customer service through Amazon Messages to request a replacement or refund.

⏱ Estimated Delivery Time

Delivery times vary by location:

• USA: 3-7 business days
  
• Canada & Europe: 7-18 business days
  
• Australia & New Zealand: 10-20 business days
  
• Other regions: 15-45 business days
  

Delivery times may vary due to carrier delays, customs clearance, or local delivery conditions.

🚚 Shipping Information

Processing Time:

Orders are usually processed within 1-2 business days after payment confirmation.

Shipping Method:

• USA orders: For eligible US orders, products are fulfilled from our US warehouse network and shipped via USPS, UPS, or FedEx.
  
• International orders: Shipped via reliable international carriers
  

Tracking:

A tracking number will be emailed after shipment. You can track your order through carriers such as USPS, UPS, FedEx, DHL, or 17TRACK.

📦 Order Issues

If your package arrives damaged, incorrect, missing items, or significantly delayed:

Please contact us with:

• Order number
  
• Photos/videos of the package and product
  
• Description of the issue
  

Our team will review and provide a solution as quickly as possible.

🔄 Returns & Warranty

We accept returns within 30 days after delivery.

To be eligible for a return:

• Item must be unused, uninstalled, and in original condition
  
• Must include original packaging and all accessories
  

⚠️ Installed, used, or tested parts are not eligible for return unless there is a confirmed manufacturing defect.

For return requests, please contact us first with your order number, product details, and photos (if applicable).

📧 info@auceramic.com

Warranty Coverage:

✔ Manufacturing defects

✔ Shipping damage

Not covered:

✘ Improper installation

✘ Misuse or modification

✘ Incorrect vehicle application

💬 Fitment Support

Not sure if this part fits your vehicle?

Send us your year, make, model, engine size, and VIN (if available). Our team will help confirm compatibility before purchase.

📧 info@auceramic.com