In this article, you will find step-by-step instructions (with photos, videos, and tips) on how to change spark plugs and ignition coils on Porsche vehicles.

Symptoms

Symptoms that your Porsche spark plugs need to be replaced.

  • Engine misfire
  • Poor fuel economy
  • Rough idle
  • Difficult to start
  • Slow acceleration
  • Engine overheating
  • Engine shaking at idle

What you will need

For Porsches with rear engine setup:

Procedure

  1. Park. Park your Porsche on level ground and allow it to cool down. turn off porsche and get ready to change the spark plugs
  2. Open hood. Pull the hood release under the dashboard and open the hood.open porsche hood to access the spark plugs and change them
  3. Remove the plastic trim around the engine. It is held in place with several plastic screws. One screw is located near the cap for the windshield washer fluid reservoir.REMOVE PLASTIC TRIM TO ACCESS PORSCHE IGNITION COILS
  4. Remove the air pump. Use a T40 to remove the three bolts that hold the air pump. Disconnect the wire harness to the air pump. REMOVE PORSCHE AIR PUMP
  5. Remove the engine cover. Use a T30 Torx socket to remove the engine cover bolts. On models with rear engine setup such as Boxter, you will need to jack up the vehicle, remove the rear wheels in order to access the spark plug cover (heat shields) via the wheel well area.remove porsche engine cover to access ignition coils spark plugs
  6. Remove and replace spark plugs and coils.
    Start by unplugging the wire harness from all the spark plug coils. Press on the connector clip then pull.unplug porsche ignition coilDo this for all ignition coils.
  7. Remove coils. Remove the T30 Torx bolt that secures the ignition coil to the engine. Repeat for all ignition coils.remove porsche ignition coil boltPry out the ignition coil. If the ignition coils refuse to come out, try twisting the coil and pulling them out at the same time.remove and replace porsche ignition coil
  8. Remove spark plugs. Use a 5/8 spark tool or a deep 16mm socket to remove the spark plugs. Turn the ratchet counter-clockwise to remove the spark plugs.REPLACE PORSCHE SPARK PLUGSRepeat for all spark plugs. Inspect the condition of the spark plugs.removed porsche spark plug
  9. Install spark plugs. Carefully lower the new spark plugs in the cylinder. Do not allow spark plugs to drop. If a spark plug falls in the spark plug hole, remove it and inspect the gap. Start threading the new spark plugs by hand.install new Porsche spark plugs
  10. Torque spark plugs. Use a torque wrench to torque all the spark plugs to 30 Nm.
  11. Install ignition coils. Push the ignition coil in the spark plug hole. Tighten the ignition coil bolt to 10 Nm. Connect the connector for each ignition coil making sure you push the connector until you hear it click.install porsche ignition coils
  12. Install the engine cover and air pump. Tighten the engine cover bolts.porsche engine cover
  13. Repeat the procedure to replace the passenger side spark plugs and ignition coils. The process is the same for the passenger side with the exception that V8 models have an engine torque arm that will need to be removed.porsche engine torque armFollow this guide on how to remove and replace the Porsche engine torque arm.
  14. Start the engine and make sure the check engine light is off.successfully changed Porsche spark plugs and ignition coils
  15. If PSM FAILURE displays on instrument cluster drive the vehicle for 5 minutes and the warning should reset.

Pictures in this guide are from a 2004 Porsche Cayenne V8, but tips and steps here will help you change spark plugs on Porsche 944, Boxter, 997, 996, 991, 911, 981, 964, Macan.

Torque Specifications

  • Spark Plugs: 30 Nm / 22 ft-lbs
  • Ignition Coil Bolt: 10 Nm

Porsche Spark Plug Change Interval

How often do you need to change spark plugs on a Porsche?

Porsche spark plug change interval varies between 12,000 and 60,000 miles.

To find out how often you should change the spark plugs on your Porsche you need to know which engine and spark plug types installed in your car.

Here are a few examples.

  • Porsche Carrera 4 - 30,000 miles
  • Porsche 997 S - 60,000 miles
  • GT2 - 12,000 miles
  • Porsche 911 / 991.1 - 40,000 miles

Verify by looking it up on your owner's manual.

Spark Plug Gap

Porsche spark plugs come pre-gapped and do not need to be adjusted. In case you like to check they should be in the .028 - .035 range with the most common gap being 0.028.

All the spark plugs installed in one engine should have the same gap.

Notes

On rear engine applications such as 996,997 Carrera, you need to remove rear wheels, rear bumper, heat shield, and mufflers to gain access to the right rear spark plug and coil.

For example, on a 997tt it is easier and faster to drop the engine than remove various components. If you are a DIYer you can change the spark plugs on this engine without dropping the engine.

If you choose to NOT drop the engine, you will need to remove rear wheels, lights, bumper, intercoolers, exhaust, and shields to gain access to all plugs.

Replacing spark plugs on a Porsche with the front engine setup is simple and straight forward and can be completed in about two hours.

Replacing spark plugs on a Porsche with rear engine setup is more involved and may require that you remove the rear bumper, rear wheels, and muffler. This job is rated at 4.5 hours for professional mechanics. A DIYer can complete it in about 4 to 6 hours.

The average cost to change Porsche spark plugs yourself is $150. While changing Porsche sparks plugs at the dealer or a by an auto mechanic ranges from $650 to $1100.

Frequently Asked Questions

Can I replace the spark plugs without disconnecting the muffler to get access to the right rear plug?

Yes. You need patience and a Torx drive bit. Do not use a ratchet. Instead, use a small open-end wrench to get the Torx bolts off.

Should I replace the coils as well?

You can but it is not required to replace the coils as often as you change the spark plugs.

Porsche Spark Plugs

FGR 6 KQE

  • Porsche 911
    • 1999
    • 2000
    • 2001 Naturally Aspirated
    • 2005 Naturally Aspirated; Exc. GT3
    • 2006
  • Porsche Boxster
    • 2000-2006
  • Porsche Cayenne S
    • 2003-2006

FGR5NQE04

  • 2008 - 2010 Porsche Cayenne GTS
  • 2008 - 2014 Porsche Cayenne S
  • 2013 - 2014 Porsche Cayenne GTS
  • 2010 - 2013 Porsche Panamera S
  • 2010 - 2013 Porsche Panamera 4S
  • 2013 Porsche Panamera GTS

FGR 5 NQE0

  • Porsche 911
    • 2009-2011 Naturally Aspirated Specialty
    • 2012 997; Naturally Aspirated Specialty
  • Porsche Boxster
    • 2009-2011 Specialty
  • Porsche Cayenne
    • 2008-2011 V8; Naturally Aspirated Specialty
    • 2009-2011 V6 Specialty
  • Porsche Cayman
    • 2009-2011 Specialty
  • Porsche Panamera
    • 2010-2011 V8; Naturally Aspirated Specialty

FR7LDC

  • 1997-1999 Porsche Boxster

BKR6EQUP

  • Porsche 911
    • 1999 4 Electrode; Double Platinum; Resistor
    • 2001 Turbo 4 Electrode; Double Platinum; Resistor
    • 2002 4 Electrode; Double Platinum; Resistor
    • 2003 4 Electrode; Double Platinum; Resistor
    • 2004 Turbo 4 Electrode; Double Platinum; Resistor
    • 2005 Naturally Aspirated; Exc. GT3 4 Electrode; Double Platinum; Resistor
  • Porsche Boxster
    • 2001 4 Electrode; Double Platinum; Resistor
    • 2002 4 Electrode; Double Platinum; Resistor
    • 2003 4 Electrode; Double Platinum; Resistor
    • 2004 4 Electrode; Double Platinum; Resistor
  • Porsche Carrera GT
    • 2004 4 Electrode; Double Platinum; Resistor
    • 2005 4 Electrode; Double Platinum; Resistor

This list provides spark plug part numbers for the most common Porsche models. If the spark plugs for your Porsche are not listed here, they will be listed in your owners manual.

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Thank you! 

Visitor
Member since 2020-09

I had great difficulty trying to replace the right rear spark plug, even though I was able to replace the other 5 plugs. I tried twice and gave up because it was impossible for me to get my hand in to unplug the connector on the top side of the coil. I even tried from the top side through the engine hood, and even though I could reach it with one hand only, and click the lock on the connector open, I could not pull the connector out while holding it open at the same time. The rubber connector seal was too tight. From under the car there was no room to get my hand in there at all, even to slide the plastic cover off the connector, and I have medium side hands. I tried every angle, from the side, through the opening in the bottom of the muffler mount which blocked access to the coil. I decided it was impossible to do it, and even putting the car on a lift would not have made it possible, only make it more comfortable to try than the car on jacks. I have access to OEM Porsche repair data, and the instructions only describe the removal process, not how to get in there. So I decided that I had to remove the muffler, which I was reluctant to do because of worry that the nuts and bolts would break. I tested them by trying to loosen some, and discovered they were not frozen and loosened easily. I saw that only 3 nuts on the muffler mount and two on the muffler pipe connection needed to be removed, and the muffler would come out. So I was easily able to remove the muffler and from underneath the car without removing the rear body bumper cover! Now I had room to get in there, but it was still difficult to get that coil connector unplugged, but now possible. It was not too hard to get the coil out, and the plug replaced with 1 long, 1 short 3/8" ratchet drive extensions, and 1 u-joint, in various combinations whichever worked best for removal or tightening. My advice is to take out the muffler and make the job easier for all three plugs on the right side. Why hassle with trying to replace them with the muffler in when it is not hard to take it out? The left side did not have the same muffler mount blocking access to the rear coil, so I was able to do those plugs with the muffler in, but it would have been easier with it out. I bet Porsche mechanics take it out. I took some photos I will post soon. The little Torx bit set I bought helped with the coil Torx bolts

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Visitor
Member since 2020-09

Just replaced six coil packs on 997 3.8S . I had replaced spark plugs about 9 months ago so this was a similar job of course . Just like to say it can be done without removing exhausts . It helps if you are a cortortionist especially if you're doing it on your back . It's very fiddly to say the least and if you have big hands even worse . It helps to remove the sensor plugs in the head this will give slightly more room . Wheels really should come off as you will be at all sorts of angles on the floor some access is better to the rear of the underside of the car and dome from the other end of the engine . It took me just over 3 hours to do all six and I'm quite a competent mechanic on 997s anyway . . I take my hat off to anyone who can jack up remove wheels heat shields 6 coils etc in 1.5 hours . Maybe on a ramp I could ? But it is possible without removing exhaust and earth leads for that matter . Very satisfying when finished and gets easier each time . Other jobs done recently include flange gaskets and bolts ,starter,alternator starter lead which fails after a while making starting a problem when hot ,front rad cleaning,brake fluid change ,sat nav aerial , rear shocks, new firs gear replace ,clutch and dyslexic mass flywheel . And that's all in the last year ! Only done 67,000 miles . Costing a fortune

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