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Spark Plugs & Ignition Coils (B58 / B48) cost

Spark Plugs & Ignition Coils (B58 / B48) on a BMW with the B58/B48/B46 engine typically costs $950–$1,000 at a BMW dealer or about $269 in parts DIY, based on 3 real owner-reported prices.

Last updated October 16, 2026 · Sources: 3 owner-reported prices from 3 cited threads

Plug change, with or without coils, on G-series and late F-series cars. Real prices reported by owners on Reddit and BMW forums, with a link to every one.

B58B48B46G20 F30 G30 G01 G05 G22 G42 F48

Limited data: Dealer quotes only so far (from thread titles), plus coil part prices. No indy invoices yet.

Typical cost

BMW dealer

$950 – $1,000

Median $975 · 2 data points

Independent shop

No real price found yet

DIY (parts/tools)

$269

Median $269 · 1 data point

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
$950	Dealer	Dealer quote, plugs, 2020 M340i (B58)	[1]
$1,000	Dealer	Dealer quote, plugs, 2018 340i (B58)	[2]
$269	DIY	Six Bosch coils at $44.81 each (coils only, no plugs)	[3]

Dealer plug quotes around $1,000 are common; get an indy quote for comparison.
Coils only need replacing if they fail or test bad; plugs are the scheduled item.

How long it takes

Plugs are near the top of the engine on the B58; owners in the sources call it a short job with the right socket.

Which cars are affected

330i/M340i (G20), 340i (F30), 530i/540i (G30), X3 30i/M40i (G01), X5 40i (G05), 230i/M240i (G42), X1 28i (F48). Bosch coil 12138643360 fits B46/B48/B58.

Symptoms

Misfire codes / flashing check engine light
Rough idle or stumble under load
CBS spark plug reminder

Parts list

Spark plugs (B58)	ECS Tuning Pelican Parts Amazon
Ignition coil (Bosch 12138643360)	ECS Tuning Pelican Parts Amazon
Thin-wall 12-point 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 (B58 / B48) cost?

Spark Plugs & Ignition Coils (B58 / B48) on a BMW with the B58/B48/B46 engine typically costs $950–$1,000 at a BMW dealer or about $269 in parts DIY, based on 3 real owner-reported prices.

How much does Spark Plugs & Ignition Coils (B58 / B48) cost at a BMW dealer?

Real dealer prices we found ranged $950 to $1,000 (2 data points, median $975).

How much does an independent shop charge for Spark Plugs & Ignition Coils (B58 / B48)?

We have not found a real independent shop price for this job yet.

Can I do Spark Plugs & Ignition Coils (B58 / B48) myself?

Owners who did it themselves reported $269 in parts and tools.

How long does Spark Plugs & Ignition Coils (B58 / B48) take?

Plugs are near the top of the engine on the B58; owners in the sources call it a short job with the right socket.

Which BMWs are affected?

330i/M340i (G20), 340i (F30), 530i/540i (G30), X3 30i/M40i (G01), X5 40i (G05), 230i/M240i (G42), X1 28i (F48). Bosch coil 12138643360 fits B46/B48/B58.