MODLOG is a free UK car modification tracker and build log app by COLLINGHAMCO LTD. 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 3 Series modifications add value when I sell?

A documented history does. Buyers pay more for a BMW 3 Series 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 3 Series build on MODLOG?

Yes — MODLOG is free to start. Enter your UK number plate and your BMW 3 Series'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 3 SERIES

BUILD LOGS & MODIFICATIONS

The BMW 3 Series — especially E46, E90, and F30 variants — is one of the most popular platforms for UK enthusiasts. M sport builds, coilover installs, and engine upgrades are extensively tracked on MODLOG.

LOG YOUR BMW 3 SERIES

COMMON BMW 3 SERIES MODIFICATIONS

Coilovers (£500–£1,500)

Exhaust (£400–£1,200)

Stage 1 tune (£300–£600)

Wheels (£600–£2,000)

Brake upgrade (£500–£1,500)

TYPICAL BUILD INVESTMENT

£3,000–£10,000 for a modified 3 Series

BMW 3 SERIES BUILD STATS

COMPILED FROM 2 LIVE BUILDS ON MODLOG

BUILDS

£3,996

AVG SPEND

MODS LOGGED

MOST COMMON BMW 3 SERIES MODS

ENGINE

INTERIOR

EXTERIOR

OTHER

WHEELS

AUDIO

BMW 3 SERIES BUILDS ON MODLOG

The Schmiss

1989 BMW E30 325i

5 mods £6,170

VIEW BUILD →

BMW X3 E83 2004 3.0 M Sport

2004 BMW X3 3.0 M Sport

29 mods £1,821.76

VIEW BUILD →

LJ-AUTOMOTIVE PARTS FOR THIS BMW 3 SERIES

In-stock parts from the LJ-Automotive store with "Bmw 3 Series" in the product title.

Rear Lip Spoiler / Boot Lip for BMW 3 Series E30 Saloon & Convertible, Gloss Black

Lion Tuning

£187.24

MXPR Coilovers Lowering Suspension Kit for BMW 3 Series F30 F80 (316 318 320 328 330 335 & 340

Maxpeedingrods

£279.00

BMW Mirror Cap Set, black gloss suitable for BMW 3 series G20/ G21, 2019+

JOM

£20.03£42.96

BMW Mirror Cap Set, black gloss suitable for BMW 3 series F30 F31 F34 F35 Sedan/GT/Touring; 4 series F32 F33 F36 Coupe/Cabrio/Gran Coupe; 1 series F20 F22 5-door

JOM

£15.32£42.96

BMW Mirror Cap Set, black gloss suitable for BMW 3 series E90, E91, pre-facelift 2005-2008

JOM

£15.32£42.96

BMW Fog lights smoke suitable for BMW 3 series E92 and E93 year 2007-2013

JOM

£25.92£46.40

BMW Fog lights clear suitable for BMW 5 series F10 and F11 year 2010-, 2 series F22 and F23 year 2013-, 3 series E92 and E93 year 2005-2013, and 5 series Gran Turismo (F07) year 2009-

JOM

£21.21£60.16

BMW Fog lights smoke suitable for BMW 5 series F10 and F11 year 2010-, 2 series F22 and F23 year 2013-, 3 series E92 and E93 year 2005-2013, and 5 series Gran Turismo (F07) year 2009-

JOM

£21.21£68.76

BMW Fog lights smoke suitable for BMW 3 series E90 year 2005-2008

JOM

£23.56£67.04

BMW Fog lights smoke suitable for BMW 1 series F20, F21 and 3 series F30, F31, F34 (GT), F35 and F32

JOM

£23.56£94.56

BMW Fog lights clear suitable for BMW 1 series F20, F21, 2 series F45, F23, F22, F46, 3 series F30, F35, F80, F34, F31, 4 series F33, F83, F32, F82, F36

JOM

£23.56£85.96

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

JOM

£44.71£64.46

BROWSE ALL BMW 3 SERIES PARTS AT LJ-AUTOMOTIVE →

BMW 3 SERIES MODIFYING FAQS

Straight answers on BMW 3 Series modification costs, popular parts and documenting your build.

Based on 2 BMW 3 Series builds logged on MODLOG, the average total spend is £3,996. Costs vary by build level — browse the live builds below to see actual costs.

OWN A BMW 3 SERIES?

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

LOG YOUR BMW 3 SERIES BUILD