Arnott C-3421 Air Spring to Coil Spring Conversion Kit - Rear

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Arnott C-3421 Air Spring to Coil Spring Conversion Kit - Rear

Brand	Arnott C-3421
Position	Rear
Product line	NEW
Fits	Nissan and INFINITI · 18 vehicles

Standard replacement. Converts factory air-assisted suspension with a complete coil spring kit.

Steel coil springs. Compression springs with black finish for a clean, durable setup.

Includes isolators. Rubber upper and lower spring isolators help complete the conversion.

$558.04Free shipping

In stock · usually ships same day before 1pm CST

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Rear Air Spring Conversion for Armada and QX56

Arnott C-3421 is a rear coil spring conversion kit for the 2004-2010 INFINITI QX56 and 2005-2015 Nissan Armada with 4WD. It replaces the factory air-assisted rear suspension with a coil spring setup using model-specific shock absorbers, coil springs, and rubber upper and lower spring isolators.

Built as a standard replacement suspension solution, this Arnott NEW line kit is aimed at drivers who want to convert away from rear air suspension components while maintaining vehicle-specific ride characteristics. The C-3421 part number is a direct reference for shoppers searching for a rear air spring to coil spring conversion kit for Nissan Armada and INFINITI QX56 applications.

Key Features

Rear air spring to coil spring conversion kit
Fits 2005-2015 Nissan Armada, rear
Fits 2004-2010 INFINITI QX56, rear
Includes model-specific shock absorbers and coil springs
Includes rubber upper and lower spring isolators
Steel spring construction with black finish
Standard replacement suspension grade
Passive suspension configuration

Product Details

Arnott C-3421 is engineered for rear suspension conversion on the Nissan Armada and INFINITI QX56 platform when the factory air-assisted rear setup is being replaced with coil springs. The kit uses application-specific components to match the vehicle’s rear suspension geometry and includes the spring isolators needed for proper seating and noise control. As part of Arnott’s NEW product line, C-3421 focuses on direct-fit replacement for the listed 4WD models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Search terms such as rear air suspension conversion kit for 2005-2015 Nissan Armada 4WD and 2004-2010 INFINITI QX56 rear coil spring conversion kit align with this application.

Common Issues This Kit Addresses

Rear air suspension failure on Armada or QX56 models
Need to replace air-assisted rear components with coil springs
Uneven rear ride height caused by aging air suspension parts
Suspension noise related to worn spring isolators
Loss of consistent rear suspension support

Installation Notes

Compatible With 2005-2015 Nissan Armada, rear, and 2004-2010 INFINITI QX56, rear. This kit is for 4WD vehicles only. Verify the vehicle’s rear suspension configuration before installation and confirm that the application matches the factory air-assisted setup being converted. Follow service manual procedures for rear suspension removal and installation, and inspect related mounting points and hardware condition during service.

Quality Assurance

Arnott supplies suspension components for vehicle-specific replacement applications, and the C-3421 kit is built as a standard replacement conversion solution for the listed Armada and QX56 rear suspension platforms.

This part fits 18 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Drive Type	Position	Notes
2015	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2014	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2013	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2012	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2011	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2010	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2010	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2009	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2009	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2008	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2008	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2007	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2007	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2006	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2006	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2005	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2005	Nissan	Armada	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
2004	INFINITI	QX56	4WD	Rear	Rear conversion kit includes springs, seats, and isolators for air spring to coil spring.; NEW
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