Free core knowledge
Repair guides, reviewed technical answers and their evidence should not disappear behind a paywall.
ABOUT WRENCHGUIDE
Built by petrolheads, for petrolheads.
WrenchGuide is a community-driven workshop companion built to make reliable repair information easier to find, understand and use. No paywalls around core repair knowledge, no sponsored answers — just better information for people who like working on their cars.
Why this exists
Useful repair information is often scattered across workshop manuals, old forum threads, videos, parts catalogues, diagnostic tools and personal notes. WrenchGuide tries to bring the useful pieces together without pretending uncertain information is fact.
WrenchGuide is growing across BMW ownership, with a model-data and research window of 2005–2018. E9x remains our first reviewed repair-guide collection; each new model and engine needs its own evidence before technical coverage expands. Explore model data and current coverage →
What the project stands for
Evidence first
Forum posts and community experience tell us what owners need help with. Technical truth still comes from traceable, appropriate sources.
Community driven
Corrections, better sources, owner questions, repair photos and missing procedures help decide what WrenchGuide researches and improves next.
Independent answers
Funding, donations or future partnerships never get to change a technical answer. Evidence wins every time.
Help build WrenchGuide
Found something wrong? Know a better source? Have photos from a repair or a procedure that is missing? Tell us. WrenchGuide gets better when owners share what they have learned.
Community submissions are reviewed before they become technical guidance. We do not automatically promote forum replies, anecdotes or popularity into repair facts.
Have something useful to contribute?
Use the community feedback form to send corrections, missing topics or workshop notes. If you have photos or source material, describe what you have and we can work out the safest and most useful way to include it.
Community supported, not paywalled
WrenchGuide is currently built and maintained as a passion project. There is no monetisation requirement behind the product and no plan to lock core repair knowledge behind a subscription.
If the community grows, optional support such as donations may be added to help cover hosting, infrastructure, data, tooling or research costs. Any future funding model must preserve the project's independence and must not influence technical recommendations.
What success looks like
Success is not maximizing conversions. It is building a workshop resource that owners trust, use beside their cars, correct when it is wrong and improve for the next person.
See what owners are asking → or browse reviewed technical knowledge →.