UF502 Ignition Coil & 7781 Double Iridium Spark Plug Kit - Reliable

In this review the UF502 ignition coil and 7781 double iridium spark plug kit is evaluated for drivers who need a direct-fit replacement for several Chrysler, Dodge and Volkswagen V6 models. The bottom line: it is best for owners who want an affordable, OEM-style swap that restores smooth idle, reduces misfires and can improve fuel economy. Installers praised the fit and quick installation, and the double iridium plugs plus sturdy coils are the single biggest reason many buyers see improved cold starts and steadier power delivery.

Key Features

• Direct vehicle fit: The kit is compatible with many 3.5L and 4.0L Chrysler and Dodge V6 models and the Volkswagen Routan, which simplifies parts matching for those vehicles.
• Complete set: Includes six ignition coil packs and six double iridium spark plugs so you replace all cylinders at once for consistent performance.
• Durable spark plugs: Double iridium construction is designed for long life and a consistent, stable spark, helping maintain combustion efficiency over time.
• Robust coil design: Premium materials, stainless-steel spring and internal ferrite suppressor reduce radio interference and transfer high voltage reliably.
• OE cross references: Matches common part numbers like UF-502, C533 and 4606869AB, making it straightforward to confirm compatibility before purchase.

Who It's For

This kit is aimed at owners and independent mechanics working on compatible 3.5L and 4.0L V6 engines - for example Dodge Avenger, Charger, Grand Caravan, Chrysler 300, Sebring, Town & Country, and the Volkswagen Routan of the listed years. It is particularly useful for anyone experiencing misfires, rough idle or reduced fuel economy who wants a full-cylinder refresh rather than swapping a single component.

It is less appropriate for vehicles outside the listed applications or owners who require OE-branded warranty coverage from a vehicle dealer. Buyers wanting factory-branded parts or those unsure about fit should verify the second main picture vehicle list or consult a professional before purchase.

Pros & Cons

Pros

• Good fit and build quality that many customers report installs quickly and seats perfectly.
• Complete six-pack ensures all cylinders receive new coils and plugs at once for balanced performance.
• Double iridium plugs and quality coil materials contribute to better fuel efficiency and longer service life.

Cons

• Not accompanied by a printed instruction manual, so novice installers may need guidance or a service manual.

Specifications

Brand	X4XZ
Included parts	6 ignition coil packs, 6 double iridium spark plugs
Compatible engines	3.5L and 4.0L V6 (listed model years)
OE cross references	UF-502, C533, 5C1094, E252, E415, 4606869AB/AA
Plug type	Double iridium
Noise suppression	Internal ferrite suppressor in coil

Our Verdict

The UF502 and 7781 kit is a practical value choice for owners of the listed Chrysler, Dodge and Routan V6 vehicles who need to cure misfires or restore smoother operation. It delivers good fit, durable double iridium plugs and coils built to limit interference, making it a cost-effective way to improve cold starts, fuel efficiency and overall engine smoothness without paying dealer prices.

Frequently Asked Questions

Will this kit fit my vehicle?
Check the compatible years and engine sizes listed in the product images and description; it fits specific 3.5L and 4.0L V6 models from Dodge, Chrysler and Volkswagen Routan.

Are instructions included?
The package does not include a printed manual, so some buyers use a service manual or online guide for torque specs and installation sequence.

How long will the spark plugs last?
Double iridium plugs are rated for long service life and consistent spark performance, suitable for extended intervals compared with standard plugs.