03843N0 Mahle Volvo D12 Piston Ring Set for FH12 Trucks – 3848522, 3840819

Product Details

Product Overview

This is a premium quality Mahle Piston Ring Set, specifically designed for the Volvo D12 and FD12 diesel engines, commonly used in Volvo FH12 trucks. This set is a direct replacement for OEM part numbers 3848522 and 3840819, and carries the Mahle manufacturing code 03843N0.

As a critical component of the engine’s power assembly, this piston ring set is engineered to restore compression, control oil consumption, and ensure optimal combustion efficiency. It is a 100% new, top-quality product sourced from Mahle’s supply chain, making it an ideal solution for engine overhauls and rebuilds on heavy-duty Volvo truck applications.

Key Features & Benefits

• OEM-Grade Fitment: Manufactured to meet original Mahle specifications, ensuring a precise fit for Volvo D12/FD12 engine blocks without the need for modifications.
• Superior Material Composition: Constructed from high-strength ductile iron and steel alloys, offering excellent wear resistance and thermal stability under high compression and extreme temperatures.
• Enhanced Oil Control: Features advanced oil ring geometry designed to minimize oil consumption while maintaining proper cylinder wall lubrication, extending engine life.
• Reliable Compression Seal: Precision-ground top and second rings provide a robust seal to maximize cylinder pressure, improving fuel efficiency and horsepower output.
• 100% New Condition: Guaranteed new, non-remanufactured parts, eliminating the risk of premature failure associated with reused components.
• Complete Set: Includes all necessary rings (top, second, and oil control) for a single cylinder, simplifying the ordering process for rebuilds.
• Global Compatibility: Suitable for a wide range of Volvo heavy-duty trucks and industrial applications utilizing the D12 engine platform.

Technical Specifications

OEM Cross-Reference

This piston ring set is a direct replacement for the following original equipment manufacturer (OEM) and alternative part numbers. Please verify your existing part number before ordering.

• Volvo OEM: 3848522, 3840819
• Mahle Code: 03843N0

Note: While this is the exact Mahle replacement for the listed Volvo numbers, always cross-check your engine serial number and existing ring dimensions for absolute compatibility.

Compatibility

This piston ring set is specifically engineered for the following engine and vehicle applications. Fitment is based on the OEM specifications provided.

• Engine Models: Volvo D12, Volvo FD12
• Vehicle Applications: Commonly used for Volvo FH12 trucks and related heavy-duty commercial vehicles equipped with the D12 engine platform.

Disclaimer: This product is designed for the specific engine models listed. It may not be compatible with other Volvo engine families (e.g., D13, D16) or non-Volvo applications without modification.

Global Supply & Distribution

We specialize in the global export of heavy-duty diesel engine parts. Our logistics network supports efficient shipping to major industrial markets worldwide.

• Markets Served: North America, Europe (EU & UK), Southeast Asia, Middle East, Africa, and Australia.
• Shipping Capabilities: Fast air freight and cost-effective sea freight available. We ship via DHL, FedEx, UPS, and major container lines to ports like Rotterdam, Houston, Dubai, and Shanghai.
• Export Expertise: With years of experience in international trade, we ensure proper documentation, customs clearance support, and secure packaging for long-distance transit.

Quality Assurance

We prioritize quality to ensure your engine performs reliably under demanding conditions.

• Manufacturing Standard: Parts are sourced from certified supply chains adhering to ISO quality management systems.
• Warranty: While specific warranty terms are available upon request (standard “Online support” for technical inquiries), we stand behind the authenticity of genuine Mahle products.
• Testing: Components are 100% new and undergo dimensional inspection to ensure they meet Mahle’s strict tolerance requirements before shipment.

FAQ

1. Is this piston ring set a direct fit for my Volvo FH12 with a D12 engine?

Yes, based on the OEM numbers 3848522 and 3840819, this set (Mahle 03843N0) is the standard replacement for the Volvo D12 engine used in FH12 trucks. However, we always recommend verifying the existing part number on your old rings and checking your engine’s specific serial number range to confirm compatibility, as there may be slight variations in different production years.

2. Does this set include rings for all cylinders, or is it a single-cylinder set?

This listing typically refers to a set of rings for a single cylinder (one piston). For a full engine overhaul (6 cylinders for a D12), you would generally need to purchase 6 sets. Please confirm the quantity included in the package with the seller if you require a complete engine set.

3. What is the recommended installation procedure for these piston rings?

Installation should be performed by a qualified diesel mechanic. Key steps include: cleaning the ring grooves thoroughly, checking ring end-gap in the cylinder bore, using a proper ring expander tool to avoid distortion, and staggering the ring gaps (typically 120 degrees apart) to prevent blow-by. Ensure the cylinder bore is within service limits and properly honed before installation.