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BMW N54 Spark Plug DIY

June 2, 2017 By bmwtuningLeave a Comment

BMW N54 Spark Plug Replacement

How Often You Should Change Your Plugs & Why

For the N54 engine the spark plugs should be changed every ~40,000 miles. Tuned N54’s should have their plugs changed every ~20,000 miles as the additional power will put a higher demand on the spark plugs. The more horsepower and boost you are running will require shorter intervals for changing spark plugs. It is recommended you change the spark plugs and ignition coils before tuning your N54 as weak coils and plugs may cause misfires.

Get your spark plugs here: N54 Spark Plugs

Tuned N54’s should be running: 1-Step Colder Spark Plugs

Spark plug thin-walled socket: 14mm 12-Point Socket

Tools Required:

  • 1)Wrench w/ extension
  • 2)8mm Socket
  • 3)5mm Allen Wrench
  • 4)14mm, 12-Point THIN WALLED Socket

Steps:

1)Remove the cabin air filters and all of the housing around it. There are 2 wires that need to be removed before pulling off the housing.

a.Your engine should now look like this:

2)Remove the engine cover. There are 4 5mm bolts that hold it down – 1 in each corner. The bolt in the back left is hard to reach so I recommend placing a magnet just below the bolt in-case you drop it.

3)With the cover removed you will see your coil packs. Lift the tab and it will pop the wires out.

4)Move the wires to the side and lift the tab to ~90 degrees. Gently pull up on the coil pack and it will come out.

a.If you’ve never removed your coil packs before it may require quite a bit of force – just make sure you gently apply more & more force until it starts sliding up.

5)With the coil packs removed you will have access to the spark plugs. Removing the plugs requires the use of a special thin-walled 14mm 12 point socket. I tried using a normal 14mm craftsman socket and it was too fat to grip the spark plug.

6)Remove the old plugs and replace them. The new spark plugs should be tightened to 17 ft-lbs of torque.

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Filed Under: N54, N54 DIY Guides

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BMW Apparel - 40Roll

BMW N54 Content List

Performance & Tuning

N54 500 Horsepower for $1,500

N54 MHD Tuning Guide

JB4 Data-Logging Guide

JB4 vs COBB vs MHD Tunes

Bolt-On Mods

N54 FMIC Guide

N54 Intake Guide

N54 Downpipes Guide

N54 Inlets & Outlets Guide

N54 CP & BOV Upgrades

N54 WMI Guide

N54 Fueling Mods

N54 Exhaust Upgrades

Turbo Upgrades

Single Turbo Guide

Twin Turbo Guide

Engine Problems & Maintenance

8 Common N54 Problems

N54 Common Fault Codes

N54 Vanos Solenoid Replacement

30FF Boost Under Target

General N54 Content

N54 FAQ

N54 vs N55

N54 vs N55 vs B58 vs S55

2JZ vs N54

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Our site is dedicated to all things BMW Tuning related. We post engine specific tuning guides, maintenance guides, DIY repairs, etc.

We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster.

Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. You can say we are somewhat N54 fanatics. We are hoping to soon add an F80 M3 and F82 M4 GTS.

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