WrenchGuideAutomotive workshop companion
Workshop mode

COMPLETE GUIDE · WORKSHOP RELEASED

E91 workshop identity baseline

BMW 3 Series Touring · E91 LCI · 320i · N43B20 · Any

A novice-friendly process for separating registration data from workshop-critical chassis, engine, transmission, build and VIN evidence before ordering parts or opening a repair guide.

4/4 steps released · 2 linked sources · about 25 minutes when released.

WHAT YOU WILL LEARNnovice path

FASTENER PLAN

Know what must be replaced before you start

WrenchGuide tracks fastener material, reuse policy and tightening specification separately. A torque-plus-angle instruction does not automatically mean a fastener is torque-to-yield or single-use; the replacement rule must be verified independently.

0mapped fasteners
No verified fastener map is published for this procedure yet.

WrenchGuide will not guess whether a bolt is aluminium, reusable, torque-to-yield or replace-after-removal, and it will not invent a torque value. Exact vehicle, engine, transmission and drivetrain applicability can change the answer.

Replacement rule and tightening method are different facts.WrenchGuide only labels a fastener replace-after-removal, aluminium or torque-to-yield when the applicable evidence supports that exact statement. Torque + angle is shown as a tightening method, not used as proof of torque-to-yield by itself.

BEFORE YOU START

Parts, tools & supplies

WrenchGuide builds this list from the repair itself. Mandatory items only become hard requirements after their need has verified provenance.

100%Verified requirements still being assembled
Job inventory pending technical verification.

The procedure can exist before its complete shopping/tool list does; WrenchGuide will not invent parts just to make this panel look complete.

Fitment and approval are separate checks.An OEM/reference number narrows a part search and an oil viscosity narrows a fluid search, but neither replaces the verified vehicle fitment or manufacturer approval. Production date, VIN, engine/transmission, installed hardware and current product data can still matter.
LEARNSTEP 1 / 4
WORKSHOP RELEASEDwarning

Capture the registration-level identity

+
No visual needed for this step

Follow the written checks and use the linked sources when you need more context.

Stop and get help if
  • Make, model or core registration facts disagree.
DO THIS~5 min
  1. Use the Garage plate lookup and compare make, model and registration facts with the physical vehicle.
  2. Record discrepancies instead of editing one source to resemble the other.
LEARN AS YOU GO
  • Public registration data is a useful starting point, not an exact mechanical build sheet.
YOU ARE DONE WHEN
  • The active Garage profile matches the registration document and physical car.
IF SOMETHING GOES WRONGRecovery path
  • Preserve the information already captured, do not guess the missing value, and resume only from a VIN-matched or authoritative source.
TOOLS

No tools required for this step.

PARTS & SUPPLIES

No parts or supplies required for this step.

SOURCES & PROVENANCE2 linked

BMW VIN-specific owner's manuals and Driver's Guide

BMW UK · Personalised guide generated from the final seven VIN characters · accessed 2026-08-13

vehicle manufacturer

RDW Open Data — Registered Vehicles

RDW · Public Dutch registration-level vehicle data by licence plate · accessed 2026-08-13

standard
Progress saved locally on this device.

MY WORKSHOP JOURNAL

Remember how your car came apart.

Attach private notes and your own teardown photos to the exact procedure step. They stay on this device in the current local-first beta.

NOTESAuto-saved locally

Capture the registration-level identity

MY PHOTOS0 / 6
Image only · up to 12 MB each
No personal photos for this step yet.

Take a quick photo before disconnecting or removing something you may need to identify during reassembly.