BMW Série 1 E87 (2004 – 2011)

Reliability score : 5.5/10

The BMW 1 Series (E87 5-door, E81 3-door, E82 Coupe, E88 Convertible) marked BMW's highly successful entry into the premium compact hatchback segment. It stands out as the only car in its class to feature a longitudinal engine layout and rear-wheel drive, offering a near-perfect 50:50 weight distribution and unmatched driving dynamics. The model underwent a major facelift (LCI - Life Cycle Impulse) in March 2007. While the LCI brought interior quality improvements and exterior tweaks, it also introduced a completely new engine lineup (EfficientDynamics). Crucially for diesel buyers, the LCI replaced the older, robust M47 engine with the N47 engine, which became infamous for catastrophic timing chain failures. Consequently, buying an E87 requires extreme diligence regarding engine codes and

✅ Strengths

Class-leading driving dynamics and steering feel (hydraulic steering on pre-LCI and 130i)
Rear-wheel drive chassis offers excellent balance (50:50 weight distribution)
High-quality interior materials on LCI (post-2007) models
Superb performance from the 120d, 123d, and 130i engines
Strong rust resistance and solid exterior build quality

⚠️ Weaknesses

N47 diesel engine timing chain is a massive financial liability
Cramped rear legroom and relatively small boot space
Harsh ride quality, especially on M-Sport suspension with Run-Flat Tires (RFT)
High maintenance and repair costs compared to mainstream rivals
Poor traction in snow/ice without dedicated winter tires

🎯 Verdict

The BMW 1 Series E87 is a brilliant driver's car compromised by severe engine reliability issues in its most popular variants. For Diesel Buyers: If you want a reliable diesel, seek out a pre-2007 118d or 120d with the M47 engine, and immediately ensure the swirl flaps are blanked. Avoid the post-2007 N47 diesels entirely unless the seller provides a solid invoice proving the timing chain, guides, and tensioners have been recently replaced by a reputable specialist. Overall: The absolute best E87 is the 130i (N52), which pairs the brilliant chassis with a legendary, reliable inline-6. If buying a 4-cylinder, budget for significant preventative maintenance.