Independent · Owner-run · Not affiliated with BMW AG
Every BMW. Every Detail.
Troubleshooting guides, DIY maintenance, and honest buying advice for BMW owners — starting with the 3 Series, BMW’s heartland.
Popular: Service light reset · Battery drain · Coolant type · Buying used
By the numbers
14
in-depth guides in the launch series
6
topic hubs, from maintenance to buying
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Find Your BMW
Model-specific guides, common problems, and what to watch for — pick your chassis.
3 Series
E90, F30, and G20: the complete ownership picture — reliability by year, N20/B48/B58 engines, and every common fix.
5 Series
Executive comfort with real-world running costs. Buying advice, common issues, and maintenance schedules.
X3 & X5
BMW’s SUVs: what breaks, what it costs, and which model years are the smart buys.
Browse every topic
Every 3 Series generation, covered
From the E46 to the G20: reliability by year, engines, and common fixes.
Why BMW Guidebook
Real specs, not guesses
Torque values, fluid capacities, and procedures checked against technical documentation.
Independent guides, built from documentation and data
Every guide is built from factory documentation, technical sources, and verified owner reports.
No sponsored rankings
No paid placements, no favours. If a part or year is bad, we say so.
Latest Guides
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BMW 330i vs M340i: Is the B58 Worth the Premium? An Ownership Comparison
The bmw 330i vs m340i decision is not about which is the better car — both are the same G20 3 Series, built on the same line, sharing interior architecture, tech platform and the ZF eight-speed automatic (trim and option packages differ). It is about one question: is the M340i’s turbocharged inline-six worth roughly $13,500…
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BMW 3 Series Oil Change: The Interval BMW Won’t Tell You (Plus Exact Specs)
Your BMW 3 Series says its oil can wait 10,000 or even 15,000 miles. Your local BMW specialist says change it at half that. The BMW 3 Series oil change interval is the most argued-over number in BMW maintenance, because the answer genuinely depends on your engine, your oil spec, and how you drive. This…
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BMW 3 Series TPMS Reset: E90, F30, and G20 Are All Different — Do It Right
A BMW 3 Series TPMS reset is a two-minute job — but only if you know which of two completely different tire-monitoring systems your car actually has. The E90 generation (2006–2011) mostly uses the indirect Flat Tire Monitor (FTM), which watches wheel speeds through the ABS sensors and has no electronics in the wheels at…
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BMW xDrive vs RWD: The True Cost of All-Wheel Drive on a 3 Series
The BMW xDrive vs RWD decision looks like a personality test — all-wheel drive for the snowbelt, rear-wheel drive for the purist — but it is really a money question. xDrive adds roughly $2,000 to the sticker on a new 3 Series (verified against EPA window-sticker data for matched 2018 and 2020 model pairs), drinks…
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BMW 3 Series Check Engine Light: Causes by Engine, Codes, and Your First 30 Minutes
That little amber engine outline glowing on your cluster is the least informative warning your 3 Series can show you — it confirms the engine computer saw something it didn’t like, and tells you almost nothing about what. Generic advice (“just check the gas cap!”) misses the point, because the real bmw 3 series check…
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BMW 3 Series Won’t Start? Diagnose It in Minutes (Clicks, Silence, or Cranks)
If your BMW 3 Series won’t start, the most useful thing you can do is listen. What the car sounds like in the first five seconds — clicks, silence, or a healthy crank that never catches — splits the problem into three completely different diagnoses, and guessing the wrong branch is how owners replace a…
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BMW Guidebook is an independent, owner-run resource — not a content farm. Every guide is researched from technical documentation and verified owner reports.