
Lotus Seven (1957-73)
Production Total: 3000
Recorded in UK 2024
Licensed=163 SORN=72
S3 Licensed=23 SORN=16
S4 Licensed=37 SORN=15

The Lotus Seven, produced from 1957 to 1973, is a classic sports car known for its simplicity and performance. However, it does have some common faults that owners should be aware of:
1. **Chassis Corrosion**: Despite its lightweight design, the chassis can suffer from rust, especially in older models¹.
2. **Electrical Issues**: Problems with the ignition system and wiring are common, often due to the car's age and exposure to the elements².
3. **Oil Leaks**: The engine and transmission can develop oil leaks, which need regular monitoring².
4. **Rear Axle and Differential**: The rear axle and differential, particularly in the Series 2 models, can struggle with the high power and cornering forces³.
5. **Fuel System**: Issues with the fuel filler hose and fuel system components can arise, often requiring replacement parts².
These issues are relatively common but can be managed with regular maintenance and care.
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Generations
The Lotus Seven, produced from 1957 to 1973, went through **four generations**:
1. **Series 1 (1957-1960)**: The original model, featuring a 1.2L Ford Sidevalve engine.
2. **Series 2 (1960-1968)**: Introduced a stiffer chassis and a variety of engines, including the 1.3L Ford and BMC units.
3. **Series 3 (1968-1969)**: Featured a 1.6L Ford Crossflow engine and disc brakes.
4. **Series 4 (1970-1973)**: The final version under Lotus, with a broader fibreglass body and the same 1.6L engine options.
Each generation brought improvements and changes, maintaining the Seven's reputation for lightweight performance and simplicity.
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Engines
The Lotus Seven, produced from 1957 to 1973, featured a variety of engines across its different series. Here are the main engine options:
1. Series 1 (1957-1960):
o 1.2L Ford Sidevalve I4
o BMC A-Series I4
o Coventry Climax FWA I4
2. Series 2 (1960-1968):
o 1.3L Ford Kent I4
o 1.5L Ford Pre-Crossflow I42
3. Series 3 (1968-1969):
o 1.6L Ford Crossflow I42
4. Series 4 (1970-1973):
o 1.6L Ford Crossflow I4 (continued from Series 3)
o 1.7L Lotus Twin Cam I42
These engines contributed to the Seven’s reputation for lightweight performance and agility.
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Spares
You can find spares for your Lotus Seven at several reputable suppliers in the UK and Ireland. Here are some options:
1. SJ Sportscars: They offer a wide range of genuine and aftermarket parts for the Lotus Seven.
2. British Classic Spare Parts: Specialises in parts for classic British cars, including the Lotus Seven.
3. EU Spares: Provides OE branded parts for the Lotus Seven with free delivery on orders over £140.
4. BuyCarParts.co.uk: An online store with a variety of parts and accessories for the Lotus Seven.
These suppliers should have what you need to keep your Lotus Seven in top condition.
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Specialists
You can find specialists for Lotus vehicles in the UK and Ireland through several reputable sources:
1. Lotus Centres: You can locate your nearest authorised Lotus dealer or service centre by using the search tool on the Lotus Cars UK website.
2. Bell and Colvill: One of the oldest and most respected Lotus dealers in the UK, offering sales, service, and parts for all Lotus models.
3. Paul Matty Sports Cars: Specialises in Lotus sales, service, and parts, with a strong reputation in the Lotus community.
4. Esprit Engineering: Known for their expertise in Lotus vehicles, offering a wide range of services and parts.
5. Lotus Silverstone: An official Lotus dealer providing sales, service, and parts for Lotus cars.
These specialists should be able to assist you with any needs related to your Lotus vehicle.