BMW 1 Series E87 Engines -The Complete UK Guide
Every engine fitted to the E87 five-door hatchback -from the 1.6-litre four-cylinder petrols to the 3.0-litre straight-six and the N47 diesel that defined this generation. Real UK replacement costs, honest failure data, and the timing chain and injector issues that shape the E87's ownership story. Backed by 240+ real UK E87 enquiries in 2025 [BMW-VERIFIED].
Explore E87 Engines
BMW 1 Series E87 Engine Codes -The Complete Database
Every engine fitted to the E87 five-door hatchback specifically -including the pre- and post-facelift engine changes that split this generation in two.
Overview
BMW 1 Series E87 -Overview
The E87 is the five-door hatchback variant of the first-generation BMW 1 Series, launched in September 2004 as BMW's entry-level model.
It was the first compact hatchback from BMW to feature rear-wheel drive -a layout that would define the 1 Series until the F40 generation. The engine lineup spanned 1.6 and 2.0-litre four-cylinder petrols, a 3.0-litre straight-six petrol in the 130i, and 2.0-litre four-cylinder diesels. A significant March 2007 facelift (LCI) brought revised styling, new engines (N43 petrols and N47 diesels), and improved fuel economy across the range.
Key Facts
Platform
BMW L2 platform
Predecessor
BMW 3 Series Compact
Successor
BMW 1 Series F20
Sibling body styles in this generation
E81 (3-door hatchback), E82 (coupé), E88 (convertible)
Market Intelligence
The E87 generated 240 real UK engine enquiries in 2025 [BMW-VERIFIED], with the N47 diesel variants accounting for the largest share of demand.
Best & Worst Engines
Best Diesel Overall
M47D20 (pre-LCI, 2004–2007)
“The M47 is the last of BMW's more robust diesel fours -no rear-mounted timing chain to worry about, and a documented reputation for durability when serviced properly. The 163 bhp 120d is the pick of the bunch.”
Who it's for: buyers who want E87 diesel torque without the N47's timing chain anxiety.
Best Petrol Overall
N52B30 (130i)
“The 3.0-litre straight-six is the E87's sweetheart -smooth, naturally aspirated, and free of the N43's injector and NOx sensor woes. It's the most reliable engine in the E87 lineup.”
Who it's for: enthusiasts who want the ultimate E87 driving experience.
Highest Risk
N47D20 (post-LCI diesel, 2007–2011)
“The rear-mounted timing chain is this generation's defining risk -cold-start rattle is the warning, and a snapped chain means full replacement. The 123d's twin-turbo adds even more complexity.”
Who it's for: only buyers with documented chain-replacement history and a healthy budget.
Most Expensive Failure
N47D20 Timing Chain
“A snapped timing chain on the N47 means piston-to-valve contact and a full engine replacement. The rear-mounted design makes access difficult and labour-intensive.”
Who it's for: buyers who can afford a £4,500+ replacement if the chain lets go.
Best Value
N46B20 (118i/120i, pre-LCI)
“The 2.0-litre N46 petrol offers a good balance of performance and running costs, with fewer horror stories than the N43 that replaced it. Valvetronic and VANOS are its only real wear items.”
Who it's for: buyers who want petrol refinement without the N43's injector issues.
Most Overlooked
N52B30 (130i)
“The 130i is often forgotten in the 1 Series conversation, but it's the E87's hidden gem -265 bhp, a glorious straight-six soundtrack, and the most reliable engine in the range.”
Who it's for: enthusiasts who want a modern BMW straight-six before they all went turbo.
BMW 1 Series E87 -Ownership Economics
The E87 rule
A £4,500 N47 recon against a £5,000 E87 sits at 90% -brushing our 70% BMW threshold. On a sub-£4,000 E87, that recon is simply not viable. Against a well-kept £7,000+ 130i, the same recon drops to a more palatable figure -but the N47 is never cheap to replace. Value the car first, then the repair.
Key Takeaways
Which E87 Costs Least To Own?
N46B20 (118i/120i) -cheap parts, no turbo, no timing chain nightmares.
Which E87 Costs Most To Own?
N47D20 (123d) -timing chain work and twin-turbo complexity add up fast.
Which E87 Is Best Value?
M47D20 (pre-LCI 120d) -diesel torque without the N47's timing chain risk.
Common Problems
E87 Engine Replacement Costs -By Engine and Condition
No Generation variance from the Model Page's baseline figures -E87 shares identical engine-bay access with its E81/E82/E88 siblings, so costs are inherited directly per the Authority Model, with no divergence note required.
Core Variants
Diesel & Petrol Lineup
Scope note: All variants listed are E87 five-door hatchback only. E81 (3-door hatchback), E82 (coupé) and E88 (convertible) share most of these engines but are covered on their own Generation Pages, since fitment and labour access vary slightly by body style.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. N47D20 (largest share of 1,450 JLR‑wide figure)
- 2.2. M47D20 (share of 1,450 JLR‑wide figure)
- 3.3. N52B30 (pattern data)
Most Requested E90 Variants
- 1.1. 120d
- 2.2. 118d
- 3.3. 130i
Average E90 Replacement Cost
£1,500–£4,500 reconditioned, supply only [BMW‑QUOTE]
Most Common E90 Failures
- 1.1. N47 timing chain stretch
- 2.2. N43 injector and NOx sensor failure
- 3.3. Rear subframe mount cracking
BMW 120d
E87 (N47)
4
enquiries
BMW 118i
E87 (N43)
3
enquiries
BMW 130i
E87 (N52)
2
enquiries
FAQ
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