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supposed
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Bimmer Bytes is the one stop for BMW owners who figured out these cars aren't what everyone said they were. Every route. Every fix. Every build.

E46·N54·N55·B58·S58·God Mode·Route D·Bimmer Bytes·You were supposed to fix it yourself·E46·N54·N55·B58·S58·God Mode·Route D·Bimmer Bytes·You were supposed to fix it yourself·
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Built by drivers.
Proven by miles.

Every guide on Bimmer Bytes has been written by someone who already burned the rubber, made the mistake, and came back to tell you how to do it right.

Four routes.
One destination.

Stock and sorted to full send. Wherever you're starting, there's a path built for you.

A
Stock & Sorted
$500 – 1,500
Fix it. Sort it. Drive it. The foundation every build needs before you touch a single mod.
B
Bimmer Lite
$1,500 – 4,000
Street presence. People notice. Intake, exhaust, wheels, suspension. Not losing sleep over it.
C
Tuned & Catless
$4,000 – 8,000
Real mods. Real gains. ECU work, LSD, catless headers. You know what you're doing.
D
Full Send
$8,000+
Street or track. Turbo blueprint, cage, harness, data logging. This is not a car. This is a project.
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Talking Shit
Live
TX
tx_wrenchM-immer4m ago
Bro just paid $1,800 at the dealer for a coolant flush and thermostat. That's a Saturday morning job. Two hours max. Parts are $60.
14 agreeReplyF in chat
EM
e46_mikeBimmer Lite12m ago
Stage 2 on the N54 hits different after the downpipes. Night and day. Should've done this 6 months ago.
22 agreeReplyBuild thread
GM
godmode_garyGod Mode31m ago
If your RTABs aren't done before you start modding you're building on a broken foundation. Fix your shit first. Route A exists for a reason.
61 agreeReplyPin this
Spotlighted312 saves · most helpful in Route C this week
Complete N54 fuel pump replacement — everything the dealer won't tell you

HPFP and LPFP need to come out together or you'll be back in 6 months. Full parts list, torque specs, and the one hose everyone forgets.

312
Saves
87
Replies
24
Helpful
4.1k
Views
Knowledge base
Fix your shit first.

Every route starts here. Real part numbers. Real torque specs. No forum rabbit holes.

Route A E46 Beginner
E46 Deferred Maintenance Audit

23 checks every E46 owner needs to do before touching a single mod. Real part numbers, torque specs, and costs.

23 items $400–900
Read guide →
+
More guides coming
RTAB replacement · N54 fuel pump
Wavetrac LSD · MS42 ECU tuning
Fresh Bytes
From the factory.
No fluff.
BMW NAYesterday
BMW extends N54 HPFP coverage — check your VIN now
High pressure fuel pump failures on N54s got a quiet extended warranty bump. 2007–2013 135i, 335i, 535i affected. Free replacement if you qualify.
Recall Watch
E46 · AllAction required
Fuel line chafing — fire risk on 1999–2005 E46
NHTSA #24V-112. Fuel line contact with chassis rail under sustained load. Check VIN at nhtsa.gov. Free dealer repair.
N54 · 335i 135iTSB issued
Wastegate rattle at cold start — updated actuator available
Common N54 complaint now has an official TSB. Updated wastegate actuator covers 2007–2010 cars. Dealer install only.
Performance
is a mindset.

The BMW M tri-color has been on every M car since 1973. Three colors. Three meanings. One standard that hasn't changed in 50 years.

Blue — BMW and Bavaria  ·  Violet — the BMW & Texaco partnership  ·  Red — Texaco and motorsport. Together since 1973.
Blue · BMW & Bavaria
Violet · The Partnership
Red · Texaco & Motorsport
M Tri-Color · Since 1973
M
M Badge · Navy · Violet · Red
BIMMER BYTES
Bimmer Bytes Roundel
Every engine.
One source.

From the M10 that powered the 2002 Turbo to the S58 in the current M3. If BMW made it, we cover it.

Four cylinder · 1962–present
M10
1962–1988
1.6–2.0L · 2002, E21, E30
Powered F1 at 1,400hp
Legend
S14
1987–1991
2.0–2.5L · E30 M3
Individual throttle bodies
Legend
M40
1987–1994
1.6–1.8L · E30, E36
Entry level four pot
Phase 3
M42
1989–1996
1.8L DOHC · E36 318i
BMW's first 4-valve four
Phase 3
M44
1996–2001
1.9L · E36, Z3
Updated M42 family
Phase 3
N40
2001–2007
1.6L · E46, E87
Entry market engine
Phase 3
N42
2001–2005
1.8L Valvetronic · E46
First Valvetronic four
Phase 3
N45
2004–2011
1.6–2.0L · E87, E90
Valvetronic economy
Phase 3
N46
2004–2011
1.6–2.0L · E90, E60
Double VANOS four
Phase 3
N13
2011–2017
1.6L Turbo · F20, F30
Prince engine platform
Phase 3
N20
2011–2017
2.0L Turbo · F30, F10
TwinPower 4-cyl
Phase 2
B46
2014–present
1.5–2.0L · G20, X3
Current 4-cyl family
Phase 2
B48
2014–present
2.0L Turbo · G20, G30
Current performance 4-cyl
Phase 2
Inline 6 · standard · 1968–present
M30
1968–1994
2.5–3.5L · E9, E24, E28
The Big Six · 6x ETCC champ
Legend
M20
1977–1993
2.0–2.7L · E30, E34
The Small Six
Legend
M50
1989–1996
2.0–2.5L · E36, E34
First VANOS · Silky Six born
Legend
M52
1994–2000
2.0–2.8L · E36, E39, E46
Alloy block · Double VANOS
Legend
M52TU
1998–2000
2.0–2.8L · E46, E39
Double VANOS + DISA
Live at launch
M54
2000–2006
2.2–3.0L · E46, E60, Z4
Last pure Silky Six
Live at launch
N52
2004–2015
2.5–3.0L · E90, E60
Valvetronic NA six
Phase 2
N53
2007–2013
2.5–3.0L · E90, E60
Direct inject · Euro only
Phase 3
N54
2006–2016
3.0L Twin turbo · 135i, 335i
5x Engine of the Year
Live at launch
N55
2009–2019
3.0L Twin scroll · F30, F10
N54 successor
Phase 2
B58
2015–present
3.0L Turbo · G20, Supra
Current Silky Six king
Phase 2
Inline 6 · M Division · 1978–present
M88
1978–1989
3.5L DOHC · M1, E28 M5
ITBs · predecessor to S38
Legend
S38
1986–1995
3.5–3.8L · E34 M5, M6
First official M inline 6
Legend
S50
1992–2000
3.0–3.2L · E36 M3
Individual throttles · legend
Legend
S52
1996–2000
3.2L · US E36 M3
North America spec S50
Legend
S54
2000–2006
3.2L · E46 M3, Z3 M
8,000 RPM naturally aspirated
Live at launch
S55
2014–2020
3.0L Turbo · F80 M3, F82 M4
Twin turbo M inline 6
Phase 2
S58
2019–present
3.0L Twin turbo · G80 M3
480–550hp current M king
Phase 2
V8 · 1992–present
M60
1992–1996
3.0–4.0L · E32, E34, E38
First modern BMW V8
Legend
M62
1996–2005
3.5–4.4L · E38, E39, E53
VANOS V8
Legend
S62
1998–2003
4.9–5.0L · E39 M5
Individual throttles V8
Legend
N62
2001–2010
3.6–4.8L · E65, E60, E63
Valvetronic V8
Phase 2
S65
2007–2013
4.0L · E90/E92 M3
Last NA V8 from BMW M
Phase 2
N63
2008–present
4.4L Twin turbo · F10 M5
Hot-V twin turbo layout
Phase 2
S63
2009–present
4.4L Twin turbo · M5, M6
M Division hot-V beast
Phase 2
V10 & V12 · 1986–present
M70
1986–1994
5.0L V12 · E32, E31
BMW's first V12
Legend
S70/2
1994
6.1L V12 · McLaren F1
627hp · fastest car of its era
Legend
M73
1994–2001
5.4L V12 · E38, E31
SOHC single VANOS V12
Legend
S85
2005–2010
5.0L V10 · E60 M5, M6
507hp at 7,750 RPM
Legend
N73
2003–2008
6.0L V12 · E65 760i
Valvetronic V12
Phase 3
N74
2009–present
6.0L Twin turbo V12
Rolls-Royce & 760i
Phase 3
Turbocharged classics · 1973–1992
M10 Turbo
1973
2.0L · BMW 2002 Turbo
First Euro production turbo car
Legend
M102
1980–1982
3.2L Turbo · E23 745i
BMW's first turbo six
Legend
M106
1982–1986
3.4L Turbo · E23 745i SA
South Africa only
Legend
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