Ignition Coil

Ignition Coil Kit

Maintain the performance and reliability of your Porsche 997.1 turbo or GT2 with this premium Ignition Coil Kit, containing the correct combination of ignition coils.
                     
Fits:

• Porsche 997 MK1 TURBO 2007-09
• Porsche 997 MK1 GT2 2007-09       

Beru is the original equipment manufacturer (OEM) for Porsche ignition coils, making this kit an excellent solution for servicing the legendary Mezger engine while retaining the correct factory specification where it matters most.

Designed specifically for the 2006-2009 Porsche 997.1 turbo and GT2, this kit restores strong, consistent spark energy across all six cylinders, helping to eliminate ignition misfires, improve throttle response, enhance fuel efficiency and maintain the outstanding performance expected from Porsche's twin-turbo flat-six.

Why Does the 997.1 turbo Use Two Different Ignition Coils?

Unlike most Porsche flat-six engines, the 997.1 turbo and GT2 (2006-2009 Mezger engine) uses two different ignition coil part numbers, not because the cylinders require different ignition performance, but due to a physical packaging constraint around cylinder 6.

The original factory specification is:

• 5 × 99760210405 (or earlier superseded part numbers)
  
• 1 × 99760210406 (cylinder 6 only)

Why Is Cylinder 6 Different?

Cylinder 6 is positioned extremely close to the Variable Turbine Geometry (VTG) turbocharger actuator and the surrounding turbocharger hardware. There simply isn't sufficient clearance for the standard, slightly taller ignition coil fitted to the other five cylinders.

To overcome this, Porsche specifies a shorter-profile ignition coil for cylinder 6.

Importantly, the Genuine Porsche cylinder 6 coil delivers exactly the same ignition energy and electrical characteristics as the other five coils. The only difference is the external housing, which has been specially designed to provide the clearance required around the VTG turbocharger components.

This is why every factory Porsche ignition coil kit for the 997.1 Turbo is supplied with five standard coils and one shorter-profile cylinder 6 coil.

This kit follows that same factory configuration by supplying:

• 5 x Beru ignition coils (OEM supplier to Porsche)
• 1 x Genuine Porsche shorter-profile ignition coil for cylinder 6

This ensures correct fitment, reliable clearance around the turbocharger hardware and factory-level ignition performance.

Why Do Ignition Coils Fail?

Ignition coils operate in one of the hottest environments on the vehicle, continually exposed to engine heat, vibration and thousands of ignition cycles every minute. Over time, the insulation inside the coil can deteriorate while the outer housing may develop small cracks.

As the coils age, spark output becomes weaker or inconsistent, leading to incomplete combustion and noticeable reductions in engine performance.

When Should They Be Replaced?

Ignition coils should always be inspected whenever the spark plugs are replaced and should be renewed if any signs of deterioration are present.

Common symptoms include:

• Engine misfires
• Rough idle
• Hesitation under acceleration
• Reduced engine performance
• Check Engine Light (CEL)
• Fault codes including P0300-P0306
• Poor fuel economy
• Visible cracks in the coil housing
• During scheduled spark plug replacement

Because access to the ignition coils on the 997.1 Turbo requires significantly more labour than on naturally aspirated models, replacing the complete set at the same time is considered the most cost-effective long-term solution.

Key Features

• 5 x Beru OEM ignition coils
• 1 x Genuine Porsche cylinder 6 ignition coil
• Factory-correct configuration for 997.1 turbocharged engines
• Correct shorter-profile coil for VTG turbo clearance
• Restores reliable spark energy
• Helps eliminate ignition misfires
• Improves starting, throttle response and engine efficiency
• Ideal when replacing spark plugs
• Precision fit and long service life

Porsche 997.1 Turbo Ignition System Components

The Mezger engine remains one of Porsche's most respected powerplants, renowned for its strength, durability and motorsport heritage. To maintain its performance, the ignition system must consistently deliver a powerful spark under the demanding conditions created by turbocharged combustion.

Replacing ageing ignition coils helps ensure efficient combustion, smoother engine operation and dependable performance while reducing the likelihood of intermittent misfires that often develop as the original coils age.

This mixed Beru and Genuine Porsche kit mirrors the factory arrangement, combining OEM quality with the correct cylinder-specific design required for the unique packaging around cylinder 6.

Benefits of Replacing All Six Ignition Coils

• Restores maximum ignition performance
• Improves engine smoothness and throttle response
• Reduces the risk of future ignition failures
• Maintains factory spark energy across all cylinders
• Ensures correct clearance around the VTG turbo actuator
• Complements new spark plug installation
• Reduces future labour costs by replacing all coils at once        

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405

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Ignition Coil Set

Restore the performance and reliability of your Porsche 997.1 Turbo or GT2 with this Genuine Porsche Ignition Coil Set, containing the correct factory combination of five standard ignition coils and one shorter-profile ignition coil

Fits:

• Porsche 997 MK1 TURBO 2007-09
• Porsche 997 MK1 GT2 2007-09

Manufactured to Porsche's original equipment specification, these genuine ignition coils deliver the precise ignition performance required by the legendary 3.6ltr Mezger twin-turbo engine, ensuring smooth power delivery, reliable cold starting and maximum engine efficiency.

Why Does the 997.1 turbo Use Two Different Ignition Coils?

Unlike most Porsche flat-six engines, the 997.1 turbocharged engine uses two different ignition coil part numbers. This is not because cylinder 6 requires a different spark output, but purely due to packaging constraints around the turbocharger assembly.

The factory configuration consists of:

• 5 × Genuine Porsche Ignition Coils – 99760210405
• 1 × Genuine Porsche Ignition Coil – 99760210406 (Cylinder 6 only)

Cylinder 6 sits extremely close to the Variable Turbine Geometry (VTG) turbo actuator and surrounding turbocharger hardware. There simply isn't enough clearance for the standard ignition coil, so Porsche designed a shorter-profile housing specifically for this location.

Importantly, both coils produce identical ignition energy and electrical performance. The only difference is the physical housing design, allowing the cylinder 6 coil to fit safely without interfering with the turbocharger components.

This is why this Porsche ignition coil kit for the 997.1 turbo / GT2 includes five standard coils and one shorter cylinder 6 coil.

Why Do Ignition Coils Fail?

Ignition coils operate in one of the harshest environments on the engine, exposed to continuous heat cycles, vibration and moisture. On the turbocharged Mezger engine, the proximity of the exhaust manifolds and turbochargers subjects the coils to even greater thermal stress.

Over time the epoxy resin and insulation within the coil can deteriorate, while the outer plastic housing may become brittle and develop hairline cracks. Moisture entering these cracks can cause the electrical spark to track to earth instead of the spark plug, resulting in inconsistent ignition performance.

Although a single failed coil can cause noticeable running issues, the remaining coils are usually of a similar age and condition. Replacing the complete set ensures balanced ignition performance across all six cylinders and reduces the likelihood of future failures.

Common Signs of Failing Ignition Coils

Typical symptoms include:

• Engine misfire
• Rough or unstable idle
• Hesitation under acceleration
• Reduced engine performance
• Poor throttle response
• Increased fuel consumption
• Illuminated Check Engine Light (CEL)
• Fault codes relating to cylinder misfires
• Difficult cold starting

If left unresolved, persistent misfires can increase exhaust emissions and place unnecessary strain on the catalytic converters and oxygen sensors.

Why Replace the Complete Set?

Replacing all six ignition coils together is considered best practice, particularly on higher mileage vehicles or whenever the spark plugs are being renewed.

Benefits include:

• Restores smooth idle and power delivery
• Reliable ignition under boost
• Reduced risk of future coil failures
• Improved fuel efficiency
• Consistent spark energy across all cylinders
• Helps protect catalytic converters from damage caused by misfires

Kit Contents

• 5 × Genuine Porsche Ignition Coils – 99760210405
• 1 × Genuine Porsche Ignition Coil – 99760210406 (Cylinder 6)       

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405KIT

The product you are viewing cross references to these numbers

Ignition Coils Packs (PACK OF 6). New longer bolts
Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII



same as 99760210404/1
PACK OF 6

Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 3.4L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405

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Ignition coil. 6 Required per engine. SET OF 6
The 99760210405 is the individual coil module used on the Porsche M96 and M97 M-series engines in many 986/996/987/early 997 cars. Normally should be replaced as a set of six coils (one per cylinder) 

Why these coils should be replaced 

Age / thermal breakdown: coils are exposed to heat cycles and can develop internal insulation breakdown or hairline cracks in the housing. Over time this causes weak or leaking high voltage and intermittent sparks. 

 Misfire symptoms: a failing coil will cause single-cylinder misfires (P030x codes), rough idle, reduced power, increased fuel consumption and catalytic converter heating/damage if left. These are the most common reasons owners replace coils. 

Carbon tracking / cracking: visible cracks or carbon tracking on the coil boot can provide a leakage path for spark, reducing performance and causing intermittent faults. 

Connector / wiring issues: corroded or loose coil connectors can mimic coil failures; inspect connectors when replacing coils.  

Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Does not come with securing bolts.
2 required per coil, please order separately (part number 90006708901).

Common issues reported in practice 

One or more cylinders misfire when the engine is hot but behave quite normally when cold (typical of internal coil failure or heat-sensitive cracks). Cracked coil housings on Boxster/996 cars, owners often replace the entire set for reliability. After a spark plug change, misfires appear because weakened coils can fail once higher-voltage plugs are installed; this is a frequently reported pattern.

How to diagnose (practical steps)

Read codes: P0300 / P0301–P0306 point to misfires; note which cylinder is affected.Swap test: swap the suspected coil with another cylinder’s coil — if the misfire follows the coil, the coil is bad. (Common, quick field test used by owners.)Measure resistance: check primary and secondary coil resistances at ~20°C and compare to the ranges above.Visual inspection: look for cracks, carbon tracking, oil ingress, or damaged boots/connectors.Oscilloscope / HV probe: for deeper diagnosis a scope or HV probe can show spark energy, but most DIY diagnostics use swap + resistance checks. 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405

The product you are viewing cross references to these numbers

Performance Ignition Coil Pack.  6 Required per engine. PACK OF 6.

Fits:
Porsche 911 (996)
Porsche 911 (997)
Porsche Boxster
Porsche Cayman

The Plasma Direct is an ignition coil with a built-in high-power amplifier. Plasma Direct Coils produce 4 times more spark energy than stock coils, and generate an ultra-fast multi-spark-discharge of 10 sparks up to highest RPM.

The spark amperage is increased by 100%, allowing the spark to reach many more molecules, which therefore accelerates the ignition and combustion processes. This is extremely important in forced induction applications, but also improves the performance of normally aspirated engines.
The Plasma Direct will increase horsepower and torque throughout the entire RPM range, as well as reducing fuel consumption. Even engines with legendary smoothness will be further refined with the Plasma Direct upgrade. Plasma Direct coils are OBD II compliant.

- 100% secondary current (Spark Amperage) increase.
- 4 times spark energy increase for the initial spark discharge.
- 8% Fuel Saving
- Easy installation.
- Compatible with all OEM components.
- Compatible with OBD-II (On-Board-Diagnostics).

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

4201Rx6

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