BMW 125i Specialists
BMW 125iEngine Rebuild— From £2,200
Specialist BMW 125i engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty
Rated BMW Engine Specialists — 1,800+ Engines Rebuilt
Specialist technicians with 10-15 years of experience
12 Month Unlimited-Mileage Warranty
Nationwide Recovery
Free Engine Matching by Registration
N47 & B47 Specialists
Starting from £2,200 —
Get a Fixed-Price Quote →
Check Your Exact Engine
Enter your reg and we'll confirm your exact 320d spec.
Call Our Specialists:
01268 944 234
Your BMW 125i Engine
Vehicle
BMW 125i
Model
1 Series
Variant
125i
Fuel
Petrol
Engine
N20 (F20/F21)
Capacity
2.0L
Generations
F20/F21 (2012–2019)
Rebuild From
£2,200
Not sure which engine you have?
The 125i used two different engines across its production run — enter your registration below and we'll confirm your exact spec before you get a quote.
DVLA & VIN verified
100% secure & private
No obligation quote
BMW 125i EngineRebuild Price
Starting From £2,200
All engine codes sit on the same rebuild tier.
Exact price depends on condition and parts required — submit your reg for a fixed-price quote.
BMW 125i Timing Chain Failure (F20/F21, N47)
If your 125i is a pre-2015 model with the N47 diesel engine — that's the early F20/F21 generation — timing chain failure due to chain guide wear is a well-documented pattern, subject to NHTSA recall 18V-755. We replace timing chains, guides, and tensioners as standard on every N47 rebuild.
The later F20/F21 (2015-onwards) and F20/F21 generations use a different engine, the B47, which is significantly more reliable and doesn't share this specific issue.
Source: NHTSA Recall 18V-755 — Timing Chain Guide Wear in N47 Engines (2012–2015)
BMW 125iENGINE OPTIONS
Every 125i is different. That's why we offer the right solution for your engine, your car and your budget.
REBUILDING YOUR 125i ENGINE
We rebuild your existing 125i engine – strip it down, pressure-test it, and replace all worn or damaged components with updated OEM parts (timing chains, guides & tensioners on the N47). Near-new performance with a 12-month unlimited-mileage warranty.
From £2,200RECONDITIONED 125i ENGINES
A full strip-down, inspection and replacement of worn parts rather than a straight swap. If that's what you're after, our rebuild service is exactly that.
Learn moreREFURBISHED 125i ENGINES
Restoring your existing engine to full working condition rather than replacing it outright. Our rebuild service covers this.
Learn moreREMANUFACTURED 125i ENGINES
Built to original specification with updated components. That's exactly what our rebuild service delivers on both the N47 and B47.
Learn moreREPLACEMENT 125i ENGINES
If your existing engine is beyond economical repair, we offer complete engine replacement and fitting – sourced and fitted by our team, with the same 12-month warranty.
Learn moreUSED 125i ENGINES
Matched low-mileage used engines for when time is critical. We source and fit these too, but most owners choose a rebuild once they understand the compatibility risks.
Learn moreNOT SURE WHICH OPTION IS RIGHT FOR YOU?
Enter your registration below and we'll confirm your engine (N47 or B47) and talk you through the best solution for your 125i.
Ask About Your Options
OUR WORKSHOP
01RECOVERY COLLECTION
02STRIPPED ENGINE BLOCK
03TIMING CHAIN REPLACEMENT
04TECHNICIANS AT WORK
05ENGINE TESTING (RIG)
06COMPLETED & READY FOR REFIT
Real photos from our workshop — not stock images. This is what a genuine rebuild looks like.
BMW 125i ENGINEREBUILD PROCESS
WHAT BMW OWNERS SAY
WE COVER YOUREXACT VEHICLE
Enter your registration below and we'll confirm whether your 125i has the N47 or B47, along with an exact rebuild price.
WHY BMW 125iOWNERS CHOOSE US
Engine matched using VIN or registration number — confirms N47 vs B47 before you're quoted
We don't swap your engine for an unknown used unit
All engine ancillaries serviced as part of the rebuild
Genuine specialist workshop — not a broker
Nationwide recovery, workshop rebuild
Trade & public enquiries welcome
Specialist technicians with 10-15 years of experience
12 month unlimited-mileage warranty
Dedicated advisor from quote to fit
OUR MOST RECENTBMW RECOVERIES & REBUILDS
Real vehicles brought into our workshop. Open bonnets, stripped blocks, and cars ready for collection — this is what genuine engine work looks like.
BMW 320d
RECOVERY
BMW 335d
DIAGNOSTICS
BMW 330i
STRIPPED ENGINE
BMW M3 (E92)
TIMING CHAIN REPLACEMENT
BMW 320d
IN FOR REBUILD
BMW 325d
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most BMWs are recovered within a few hours of booking. Most rebuilds are completed within 3-5 working days.
Workshop slots fill up fast — book your recovery today.
LOOKING FOR A USED ORREPLACEMENT ENGINEINSTEAD?
We supply low-mileage, VIN-matched used units too. However, most BMW owners choose a rebuild once they realise it removes compatibility risk, keeps their original engine number, and often works out cheaper than fitting an unknown used engine.
Enter your reg below — we'll show you both options.
ABOUT THE BMW125i ENGINE
The 125i has been a mainstay of the 1 Series diesel range since 2012, spanning two generations under one badge. Early F20/F21 models from 2012 to 2015 use the N47, a 2.0-litre diesel that's part of a family known for a specific timing chain issue. From late 2015 onwards, across both the F20/F21 and later the F20/F21, the 125i switched to the B47, a newer, significantly more reliable unit that doesn't share the N47's timing chain concerns. Knowing which one your car has matters, because the components and the known wear pattern differ — which is exactly why we confirm your exact engine by registration before quoting.
The 125i is no longer in production, but we continue to rebuild and replace engines for every one still on the road.
BMW 125i ENGINE CODES
N47 (F20/F21, 2012–2015)
A 2.0-litre diesel fitted to the early F20/F21 125i. Known for timing chain failure due to chain guide wear — see the callout above. We replace timing chains, guides, and tensioners as standard on every N47 rebuild.
Check Your N47 125iB47 (F20/F21, 2015–2019 / F20/F21, 2019–2024)
The later 2.0-litre diesel, fitted from 2015 onwards. A different design from the N47 that is significantly more reliable and doesn't share its predecessor's timing chain issue.
Check Your B47 125iBMW 125iENGINE COMPATIBILITY
Because the 125i spans two distinct engines across two generations, fitting the wrong replacement — or assuming an N47 part will work on a B47 car — risks a compatibility problem that's expensive to unpick. Before we quote or supply anything, we confirm:
Your exact engine code (N47 or B47) via registration or VIN
Your generation (F20/F21 or F20/F21)
Drivetrain and ancillary specification
Any electronics or ECU considerations specific to your exact build
This is why we always start with your registration rather than a generic 125i quote — it protects you from paying for parts that don't fit your actual car.
BMW 125i APPLICATIONSBY GENERATION
Generation
Chassis
Years
Engine Code
Fuel
BMW 125i ENGINESBY YEAR
From the N47 to the B47 – here's a quick guide to the engines fitted to the BMW 125i over the years. If you're unsure which one you have, we'll confirm it before you book.
2015 and 2019 were transition years between generations and engine codes — if your registration falls in either, we'll confirm your exact engine before quoting.
WE COVER EVERY BMW 125i MODEL YEAR:
BMW 125i
2013 Engine Rebuild
BMW 125i
2016 Engine Rebuild
BMW 125i
2019 Engine Rebuild
BMW 125i
2021 Engine Rebuild
BMW 125i
2023 Engine Rebuild
If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.
BMW 125i ENGINE COSTS
A BMW 125i engine rebuild starts from
£2,200
Whether your car has the N47 or the B47. A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required — submit your registration for a fixed-price quote within 30 minutes.
12 MONTH
UNLIMITED-MILEAGE
WARRANTY
BMW 125i ENGINE SIZES
• BMW 125i 2.0 Litre Engine
BMW 125i FUEL TYPES
• BMW 125i Diesel Engine Rebuilds
RELATED BMW 1 SERIES VARIANTS