BMW 1 Series Buyer's Guide
The 1 Series is the last affordable route into a rear-driven BMW hatchback, and our data so far reflects the bottom of that market: two sold diesels at £1,250 and £1,962, both 2012 cars. The interesting versions (130i, 135i, M135i, M140i and the 1M Coupé) sit well above this, and they are the reason the model earns a page here at all.
Know your generations
The E87 five-door (2004–2013, with E81 three-door, E82 coupé and E88 convertible) established the formula: engines mounted longitudinally, driven wheels at the back, in a class where everyone else went front-drive. The volume sellers were the 116i, 118i and 120i petrols and the 118d and 120d diesels; the connoisseur's picks are the 130i with its 265bhp naturally aspirated straight six and the 306bhp twin-turbo 135i coupé. The 1M Coupé of 2011–2012 (340bhp, wide-arched, manual only) is a genuine collector's car and trades in a different market entirely.
The F20/F21 (2011–2019) kept rear drive and added the M135i and later M140i, a 326bhp six in a discreet five-door body; nothing else at the price did what it does. The F40 (2019 on) switched to front-wheel drive with the M135i xDrive as a 306bhp four-cylinder, and the F70 continued that layout from 2024. For enthusiast purposes the story effectively ends in 2019.
What to pay
Two sold results only: £1,962 for a 2012 118d M Sport (March 2026) and £1,250 for a 2012 123d Sport Plus convertible (September 2026), median £1,606. Both represent the high-mileage diesel end of the market, where the 1 Series is simply used transport. Active listings support the picture: a 2013 116d estimated at £800–1,200 and a 2010 116i Sport at £500–1,500, while a 2021 118i M Sport carries an £11,500–12,500 estimate for late, low-mileage stock. The performance cars (130i, 135i, 1M, M140i) have not yet sold through our records; expect them to trade well above anything quoted here, with the 1M in serious collector territory.
What goes wrong
The N47 diesel (118d, 120d, 123d, 2007 onwards) is the headline risk: timing chains at the back of the engine that stretch and, if ignored, fail expensively because the engine has to come out to fix them. Listen for rattle at cold idle and walk away from any car without evidence of the work. The N43 and early N45/N46 petrol fours suffer coil, injector and timing-chain issues of their own; the E87's electric power steering rack can fail outright. The sixes are far more robust: the 130i's N52 is close to bulletproof, while the 135i's N54 needs its high-pressure fuel pump, injectors and turbo wastegates checked, all documented weak points with known fixes. Rear tyre wear, worn rear subframe bushes and lumpy run-flat rides are universal. F20 M135i/M140i cars with the N55/B58 are mechanically strong; buy on service history and unmodified software.
Our view
At our recorded £1,250–1,962, a tidy diesel 1 Series is disposable transport, not a keeper: the chain risk alone can exceed the purchase price. The cars with a classic future are the six-cylinder petrols. A 130i or an unmolested M140i manual has the drivetrain, the rarity of layout (rear drive in a hatchback, never to return) and the parts commonality with mainstream BMW to keep running indefinitely. The 1M Coupé has already been collected. Buy the sixes while the market still files the whole range under cheap.
