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Spark Plugs & Ignition Coils (N55) cost

60k-mile plug change, with or without new coils. Real prices reported by owners on Reddit and BMW forums, with a link to every one.

N55F30 F32 E84

Limited data: Better now: several N55 prices, but few from dealers.

Typical cost

BMW dealer

$650 – $1,500

Median $1,075 · 2 data points

Independent shop

$250 – $1,200

Median $950 · 3 data points

DIY (parts/tools)

$150 – $480

Median $300 · 3 data points

Ranges are the lowest and highest prices in the table below. They are not estimates. Shop prices include parts and labor unless noted.

Every price we found

Price	Where	Details	Source
$1,500	Dealer	Dealer quote, 6 plugs + 6 coils, 2014 335i xDrive	[1]
$650	Dealer	Same dealer, plugs only	[1]
$250	Indy	Plugs supplied by owner + 1 hr indy labor, "around $250 soup to nuts"	[1]
$300	DIY	Plugs DIY, "about $300"	[1]
$480	DIY	OEM plugs + coils online, set of 6 each	[1]
$300–$500	Dealer	Estimate FCP Euro guide: typical dealer price for N55 plugs	[2]
$950	Indy	Shop owner: last N55 plug quote ~$950 after tax, OEM parts, $195/hr	[3]
$1,200	Indy	Local BMW shop quote, plugs, 2015 X1 (E84) N55 (2025)	[4]
$150	DIY	Plugs + tools, first DIY, 2015 X1 N55 (2025)	[4]

The $1,420 dealer bill in source 3 was plugs and coils on a V8, so it is not counted here.
Several commenters say coils are not a wear item. Only replace them if you get misfires.

How long it takes

A shop owner says they bill 1–2 hrs depending on 4 or 6 cylinders (source 3). DIY: an afternoon; the strut brace and intake pipe may need to come out (source 4).

Which cars are affected

335i / 435i (N55), F3x, plus X1 xDrive35i (E84 N55).

Symptoms

Misfire codes
Rough idle
Service reminder for spark plugs

Parts list

Spark plugs (NGK / Bosch), set of 6	ECS Tuning Pelican Parts Amazon
Ignition coils (Bosch / Delphi), set of 6	ECS Tuning Pelican Parts Amazon
14mm thin-wall spark plug socket	ECS Tuning Pelican Parts Amazon

Check fitment for your exact car (VIN) before ordering. Links may become affiliate links in the future.

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Common questions

How much does Spark Plugs & Ignition Coils (N55) cost at a BMW dealer?

Real dealer prices we found ranged $650 to $1,500 (2 data points, median $1,075).

How much does an independent shop charge for Spark Plugs & Ignition Coils (N55)?

Independent shop prices ranged $250 to $1,200 (3 data points, median $950).

Can I do Spark Plugs & Ignition Coils (N55) myself?

Owners who did it themselves reported $150 to $480 in parts and tools.

How long does Spark Plugs & Ignition Coils (N55) take?

A shop owner says they bill 1–2 hrs depending on 4 or 6 cylinders (source 3). DIY: an afternoon; the strut brace and intake pipe may need to come out (source 4).

Which BMWs are affected?

335i / 435i (N55), F3x, plus X1 xDrive35i (E84 N55).