How much is a 2018 BMW 6 SeriesDiesel worth in Ireland?

The median asking price for a 2018 BMW 6 SeriesDiesel on the Irish used-car market is around €32,995, based on 11 live listings tracked by Carintel.ie.

How much does a 2018 BMW 6 Series depreciate per year?

A BMW 6 Series loses roughly 16.0% of its value per year on the Irish used-car market based on Carintel.ie's regression across active listings.

Is it cheaper to import a 2018 BMW 6 Series from Northern Ireland?

It depends on spec, mileage and CO2. Carintel.ie compares ROI median prices against Northern Ireland listings' landed cost, including VRT, NOx levy and registration fees, so you can see the saving at a glance on this page.

What are the running costs of a 2018 BMW 6 SeriesDiesel?

This page estimates annual running costs for a 2018 BMW 6 SeriesDiesel using WLTP consumption data, current Irish fuel and electricity prices, and Irish motor tax bands.

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Data and calculations are in active development and changing regularly. Please do not make buying decisions based solely on this site, always verify with other sources.

Analysing market data

Fetching listings · computing fair value · building charts

Filter by trim, gearbox, source1 active

Source:ROI All NI

Market Intelligence

BMW 6 Series2018

Diesel

NI import est.€37,727

ROI cheaper by ~€4,732

29 days avg on market · Low data confidence · VRT based on E (146–155 g/km) (30%), Revenue uses OMSP

Normal DemandLimited Data

Listing price range

€29k – €35k

25th to 75th percentile

Listings

NI active now

Updated 7h ago · NI · Low confidence

Median listing price

€32,995

private sale ~€30,725 Pricing assumptionsAssumptions· Good condition, full service history· No outstanding finance or damage· Based on ads seen in the past 30 days

Est. trade-in

€20,577 – €24,986

15–30% below private sale

Avg mileage

122k km

typical 130k km

Days listed

29d

avg on market · demand 53/100

AI Market Summary

Diesel 6 Series offers executive comfort and strong motorway performance, but this engine demands meticulous service history and highway miles to avoid expensive failures.
Median asking price sits fair for the market segment; verify any sub-€30k examples have full documentation—suspiciously low prices often hide DPF or turbo damage.
DPF regeneration faults are the critical issue on this model. Short urban trips clog the filter; check service records for regular motorway use and successful regenerations, not repeated limp-mode warnings.
Turbocharger and fuel injectors deteriorate if oil changes are missed. Request complete dealer service history (not independent stamps alone) and have a BMW-specialist pre-purchase diagnostic scan before committing.
Inspect the most recent NCT certificate for emissions pass or advisories; a failed DPF regen cycle often triggers MOT-equivalent issues and signals imminent €1,500+ repair bills.

AI-generated analysis · Carintel.ie · verify independently before purchasing

Analysis & Insights

Price Analysis Costs Import Recalls & Info

Total cost of ownership

2018 BMW 6 Series · Diesel · per year

Estimated annual cost

€8,965/yr

Per month

€747/mo

Depreciation

€5,279

59% of total

Fuel / electricity

€1,936

22% of total

Maintenance

€1,350

15% of total

Road tax

€400

4% of total

Assumptions: Depreciation based on €32,995 current market median at 16.0%/yr (regression from 11 listings across multiple years). Fuel cost assumes 16,000 km/yr (CSO Ireland average), Irish fuel prices. Road tax uses Irish CO2-based motor tax bands (NEDC regime). Maintenance is an AI estimate based on typical independent garage rates for this model.

Annual running cost

16,000 km/yr · Ireland rates

BMW 6 Series 2018, all powertrain variants

Market-level estimate

All available fuel types sorted cheapest to run · WLTP figures where available · current market highlighted

DieselDieselthis marketcheapest to run

€2,336/yr

5.5 L/100 km, diesel

Fuel €1,936/yrRoad tax €400/yr

median €32,995

Assumptions: 16,000 km/yr (CSO Ireland average). Fuel: petrol €2.00/L, diesel €2.20/L. EV: smart-night €0.17/kWh (80%), day €0.30/kWh (20%). PHEV split: 45% electric, 55% petrol. WLTP consumption figures used where available; real-world usage is typically 10-20% higher. Road tax uses Irish CO2-based motor tax bands (NEDC regime, 2008-2020 registrations).

Annual maintenance

AI estimate · Irish independent garage rates

Maintenance costs

€1,350

estimated per year

Diesel 6 Series require diligent servicing to avoid DPF and injector problems; independent garage servicing is strongly recommended to avoid main-dealer premium charges, but ensure technician has diesel engine expertise.

Annual serviceOil and filter change (5.2L 5W-30 synthetic diesel oil), fluid top-ups, filter inspections; BMW recommends 2-year intervals but annual is advisable for diesel longevity

€450/yr

Tyres (amortised)255/40R19 premium performance tyres; typical wear 30,000–40,000 miles

€320/yr

Brakes (amortised)Pads and rotors; 6 Series typically requires replacement every 60,000–80,000 miles due to heavy weight

€280/yr

NCT (amortised)Annual NCT cost amortised (€55 per 2-year test)

€28/yr

Consumables & DPF maintenanceAir filter, cabin air filter, AdBlue top-ups (diesel models), occasional DPF cleaning fluid; budget for periodic DPF service every 100,000 miles

€272/yr

AI-generated estimate · costs vary by usage and service history · not a financial forecast

Depreciation forecast

industry average

Industry avg: 16.0%/yr

+2yr

€23.3k

-29%

pvt ~€21.8k

+5yr

€13.8k

-58%

pvt ~€13.0k

+10yr

€5.8k

-83%

pvt ~€5.4k

Live market data not yet available for this segment. Industry rate: 16.0%/yr for BMW. Not a financial forecast.

Year-by-year comparison

BMW 6 Series · Diesel

Year

Median price

Private est.

Avg mileage

Confidence

Potential value opportunities

NI · by value score

2018 BMW 6 Series 640d M Sport 4dr Auto Video Review •

£19,750→€37,054imported

+1% vs expected price

NI Import

NI → ROI import costs

Assumes the car is NI-registered (no customs duty or VAT under Windsor Framework). Includes VRT + NOx levy + registration + transport. Click for full breakdown.

Low km

47k km · automatic · 34d

M Sport

See ad

2018 BMW 6 Series 640d M Sport 4dr Auto Video Review •

£20,890→€38,399imported

+6% vs expected price

NI Import

NI → ROI import costs

Assumes the car is NI-registered (no customs duty or VAT under Windsor Framework). Includes VRT + NOx levy + registration + transport. Click for full breakdown.

Low km

45k km · automatic · 30d

M Sport

See ad

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