Description

DENSO VXUH22 5611 Iridium Tough Spark Plug

The DENSO VXUH22 (5611) is an Iridium Tough spark plug designed for petrol engines that require a fine-wire iridium center electrode combined with a durable platinum ground electrode. DENSO’s Iridium Tough technology is designed to provide reliable ignition, stable combustion and long-lasting electrode performance.

The VXUH22 5611 features a 0.4 mm iridium center electrode and a platinum ground electrode. The fine center electrode concentrates the ignition spark at a small firing point, helping support reliable ignitability while the iridium construction provides excellent resistance to the high temperatures and erosion encountered inside the combustion chamber. DENSO’s catalog identifies the VXUH22 as an Iridium Tough plug with a 0.9 mm gap and 5 kΩ resistance.

The VXUH22 has a 12 mm thread diameter, 26.5 mm thread reach and 16 mm hex size. It is a relatively long-reach M12 spark plug intended for specific petrol-engine applications. DENSO lists the VXUH22 separately from the closely related VXUH22I 5656, so these two spark plugs should not automatically be treated as interchangeable.

DENSO VXUH22 Specifications

Specification Details
Brand	DENSO
Part Number	VXUH22
DENSO Stock Number	5611
Product Series	Iridium Tough
Spark Plug Type	Iridium
Center Electrode	0.4 mm Iridium
Ground Electrode	Platinum
Thread Diameter	12 mm
Thread Reach	26.5 mm
Hex Size	16 mm
Spark Gap	0.9 mm
Heat Range	22
Resistor Value	5 kΩ
Seat Type	Gasket / Flat Seat
Tightening Torque	17 Nm*
DENSO Reference	267700-6461
DENSO Internal Designation	V11
Category	Automotive Spark Plug

 

DENSO’s current Iridium Tough catalog lists the VXUH22 with a 12 mm thread diameter, 26.5 mm length, 16 mm hex, 0.9 mm gap and 5 kΩ resistance, and identifies it with DENSO number 267700-6461.

Key Features of Original DENSO VXUH22

0.4 mm Fine Iridium Center Electrode

One of the main features of the DENSO VXUH22 5611 is its 0.4 mm iridium center electrode.

The fine electrode concentrates the ignition spark at a small firing point. This fine-wire construction supports good ignitability while allowing DENSO to maintain a durable electrode despite its small diameter.

DENSO’s catalog identifies the VXUH22 as using a 0.4 mm iridium center electrode.

Platinum Ground Electrode

The VXUH22 5611 also incorporates a platinum ground electrode. The combination of an iridium center electrode and platinum ground electrode is designed to improve resistance to electrode wear.

This helps the spark plug maintain its specified firing characteristics as the electrode surfaces gradually experience normal wear during engine operation.

Iridium Tough Technology

The VXUH22 5611 belongs to DENSO’s Iridium Tough series.

The Iridium Tough range is designed around the use of durable precious-metal electrodes to provide a combination of reliable ignition and extended electrode life.

Iridium’s high melting point and resistance to erosion make it suitable for the fine center-electrode design used by the VXUH22.

Reliable Ignition

The fine-wire center electrode provides a concentrated firing point for the ignition spark.

When the VXUH22 5611 is installed in an engine for which it is specified, it is designed to provide consistent ignition and stable combustion during normal engine operation.

0.9 mm Spark Gap

The VXUH22 has a 0.9 mm spark gap according to DENSO’s product specification.

The correct spark gap is important because the ignition system, combustion chamber and spark-plug design are engineered to work together. The gap should not be changed from the manufacturer’s specified value unless an appropriate application-specific specification calls for it.

5 kΩ Resistor

The VXUH22 5611 incorporates a 5 kΩ resistor.

The resistor helps suppress electrical interference generated by the ignition system, helping reduce radio-frequency interference while maintaining the electrical characteristics required for the ignition system.

16 mm Hex Design

The VXUH22 uses a 16 mm hex size, making it suitable for installation with the appropriate 16 mm spark-plug socket.

The relatively compact hex size is useful in modern engines where clearance around the spark plug can be limited.

Benefits of DENSO VXUH22 5611

When the VXUH22 is the correct specification for the engine, its iridium and platinum electrode construction can help maintain:

• Reliable engine starting
• Consistent ignition
• Stable combustion
• Smooth engine operation
• Good throttle response
• Consistent spark performance
• Long-lasting electrode performance
• Resistance to normal electrode wear
• Reliable operation under varying engine loads
• Stable ignition characteristics throughout the recommended service interval

As with any spark plug, actual service life depends on the engine, ignition system, fuel, driving conditions and maintenance schedule.

DENSO VXUH22 5611 Applications

The DENSO VXUH22 is an Iridium Tough spark plug for selected petrol-engine applications. DENSO’s product information identifies the VXUH22 as a 12 mm × 26.5 mm long-reach spark plug and lists it within the Iridium Tough range.

The VXUH22 should be matched using the exact vehicle, engine code and original spark-plug specification. It should not be selected solely because another spark plug has the same thread diameter or physical dimensions.

Japanese Vehicle Applications

The VXUH22 specification is associated with selected Japanese petrol vehicles, particularly compact applications requiring the long-reach M12 configuration.

Potential vehicle applications can include selected models from:

• Suzuki
• Subaru
• Daihatsu
• Toyota
• Mazda
• Mitsubishi
• Honda

However, the exact application varies according to engine and model year. For SparkPlugs.pk, it is better to verify each individual application against the original spark-plug number rather than publishing every vehicle using a similar VXUH-series plug.

Suzuki

Selected Suzuki petrol applications may use the DENSO VXUH22 specification, including certain compact and kei-car applications.

Examples of relevant Suzuki model families can include:

• Suzuki Alto
• Suzuki Alto Lapin
• Suzuki Wagon R
• Suzuki Wagon R Stingray
• Suzuki Spacia
• Suzuki Hustler
• Suzuki Every
• Suzuki Carry

The correct application should be confirmed by engine code and original spark-plug number, because different generations of the same Suzuki model can use different spark plugs.

Subaru

Selected Subaru compact petrol vehicles may also use DENSO Iridium Tough spark plugs.

Relevant model families can include:

• Subaru Pleo
• Subaru Stella
• Subaru Sambar
• Subaru Chiffon
• Subaru Lucra
• Subaru Dias Wagon

The precise application depends on the engine and production specification.

Daihatsu

DENSO Iridium Tough plugs are used across various Daihatsu petrol engines. Relevant model families may include:

• Daihatsu Mira
• Daihatsu Mira e:S
• Daihatsu Move
• Daihatsu Tanto
• Daihatsu Cast
• Daihatsu Wake
• Daihatsu Taft

The VXUH22 5611 should only be used where the exact engine application specifies this plug or an officially compatible reference.

Toyota

Selected Toyota compact and kei-car models can use spark plugs from the same DENSO application family.

Examples include:

• Toyota Pixis Epoch
• Toyota Pixis Space
• Toyota Pixis Joy
• Toyota Pixis Mega
• Toyota Pixis Van
• Toyota Copen

Because Toyota kei vehicles can share platforms and engines with Daihatsu, the exact Toyota OE number should be checked before ordering.

Mazda

Selected Mazda kei vehicles may use compatible DENSO Iridium Tough spark plugs.

Relevant model families can include:

• Mazda Carol
• Mazda Flair
• Mazda Flair Wagon

The exact spark-plug specification depends on the engine and model year.

Honda and Mitsubishi

DENSO’s Iridium Tough product range covers applications from several Japanese manufacturers, including Honda and Mitsubishi. However, these manufacturers use multiple spark-plug dimensions, heat ranges and electrode configurations. The VXUH22 5611 should therefore only be listed against specific Honda or Mitsubishi vehicles after the individual engine application has been verified.