MODLOG is a free UK car modification tracker and build log app by COLLINGHAMCO. Document every modification and mile, track spending, buy and sell parts, and showcase your build.

Is MODLOG free to use?

Yes. MODLOG is free forever — log one vehicle with unlimited mods, a photo gallery and full spend tracking at no cost. Pro and Trade tiers add unlimited vehicles, analytics and a seller storefront.

What can I do with MODLOG?

With MODLOG you can document vehicle modifications, track total investment, buy and sell parts in the marketplace, rate cars on the Cool Wall, collect Top Trump cards and battle in Deck Wars.

MODLOG is the build diary for serious car enthusiasts. Log every mod, track your total spend, and share your build story with the world. Powered by COLLINGHAMCO. Built in Base 44.

Do BMW M3 modifications add value when I sell?

A documented history does. Buyers pay more for a BMW M3 with dated mods, costs and receipts than for an undocumented one. Every MODLOG build log can be shared as a link or downloaded as a PDF when the car is sold.

Can I log my BMW M3 build on MODLOG?

Yes — MODLOG is free to start. Enter your UK number plate and your BMW M3's details are automatically looked up from DVLA data. Then start logging every mod with cost, supplier and date.

BROWSE BUILDS BY MAKE

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BMW M3

BUILD LOGS & MODIFICATIONS

The BMW M3 — from the E46 through to the G80 — is the definitive German performance saloon for UK enthusiasts. Builds range from track-focused suspension setups to supercharger conversions and full carbon bodywork.

LOG YOUR BMW M3

COMMON BMW M3 MODIFICATIONS

Coilovers (£1,000–£2,500)

Exhaust (£600–£1,800)

Supercharger kit (£4,000–£8,000)

Big brake kit (£1,000–£3,000)

Lightweight wheels (£1,200–£3,500)

TYPICAL BUILD INVESTMENT

£6,000–£25,000 for a developed M3

BMW M3 BUILDS ON MODLOG

Be the first to log a BMW M3

Track every mod, every cost, every supplier. Free to start.

START YOUR BUILD →

LJ-AUTOMOTIVE PARTS FOR THIS BMW M3

In-stock parts from the LJ-Automotive store with "Bmw M3" in the product title.

BMW Fog lights yellow incl. frame suitable for BMW E46 M3 year 1998- 2007 and E39 M5 year 1998-2005

JOM

£21.21£51.56

BMW Fog lights, yellow suitable for BMW E36 incl. M3 year 1992-1998

JOM

£23.56£55.86

BMW Fog lights smoke suitable for BMW E36 incl. M3 year 1992-1998

JOM

£23.56£57.58

BMW Fog lights clear incl. frame suitable for BMW E46 M3 year 1998- 2007 and E39 M5 year 1998-2005

JOM

£21.79£57.58

BMW Fog lights clear incl. frame suitable for BMW E46 M3 year 1998- 2007 and E39 M5 year 1998-2005

JOM

£21.21£48.12

BMW Fog lights clear suitable for BMW E36 incl. M3 year 1992-1998

JOM

£23.56£48.12

Wheel spacer kit 10mm incl. wheel bolts, for BMW M3 M390

JOM

£31.75£47.26

Wheel spacer kit 20mm incl. wheel bolts, for BMW 3 series E46 M3

JOM

£44.71£64.46

Wheel spacer kit 40mm incl. wheel bolts, for BMW 3 series E46 M3

JOM

£52.95£77.36

Wheel spacer kit 30mm incl. wheel bolts, for BMW 3 series E46 M3

JOM

£50.60£73.92

Wheel spacer kit 40mm incl. wheel bolts, for BMW 3 series E36 M3

JOM

£52.95£77.36

Wheel spacer kit 30mm incl. wheel bolts, for BMW 3 series E36 M3

JOM

£50.60£73.92

BROWSE ALL BMW M3 PARTS AT LJ-AUTOMOTIVE →

BMW M3 MODIFYING FAQS

Straight answers on BMW M3 modification costs, popular parts and documenting your build.

A typical BMW M3 build costs £6,000–£25,000 for a developed M3. Costs vary hugely depending on the level of modification. Browse real builds on MODLOG to see actual costs logged by other owners.

OWN A BMW M3?

Document every mod. Prove your build when you sell. Free to start.

LOG YOUR BMW M3 BUILD