Grosvenor Motor Company

Independent BMW and MINI servicing in Reading

Grosvenor Motor Company operates a specialist workshop in Reading, Berkshire, dedicated to BMW and MINI vehicles. The company describes itself as one of Europe's largest independent BMW specialists and presents its work as an alternative to the official BMW dealer network. Its history is traced back to 1989, and the business states that it is independently owned and operated, without affiliation to or authorisation from BMW AG.

The workshop handles servicing, repairs, diagnostics and maintenance for BMW and MINI models, and also caters for electric and hybrid vehicles. Alongside routine work, the company lists more specialised jobs such as convertible roof repairs, air conditioning service, advanced diagnostics, coding and software updates.

Published prices for common jobs

The booking form on the site sets out fixed prices for a range of work, which the company presents as its current rates:

• MOT test: £29
• Oil service: £199
• Full service: £299
• Vehicle check: £68
• Transmission service (ZF8): £649
• Transmission service (Aisin or DCT): £399
• Air conditioning service, R134a (2015 or older): £95.94
• Air conditioning service, R1234yf (2016 or newer): £130
• SOS battery replacement: £195
• Headunit restarting repair: £130
• Apple CarPlay retrofit: £199
• Drivetrain light on (EML): £99
• Brakes: priced after inspection

Coding, electronics and retrofit work

A substantial part of the offer is electronic and software work. The company lists coding for a long series of BMW chassis codes, including E46, E60, E87, E90, F10, F20, F30, F80 M3 and F82 M4, as well as G20 and G21 3-Series options. Specific jobs mentioned include cruise control retrofits, 6WB instrument cluster retrofit, removal of 8TF active pedestrian protection, and a DCT gearbox software flash for the F80 M3 and F82 M4 GTS.

Diagnostics cover faults such as the emergency call button failure B7F319, headunit restarting and rebooting, theft-proofing mode 170 FSC, and SOS telematics battery replacement. The workshop also handles replacement key remotes for E-Series, F-Series and MINI F56 models, F-Series key remote upgrades, and digital service history.

Transmission and drivetrain capabilities

Automatic gearbox servicing is broken down by unit: Aisin 8-speed, Getrag 7DCT300 7-speed, ZF 6HP 6-speed and ZF 8HP 8-speed. The company also advertises ISN change, virginisation and cloning, standard BMW gearbox software updates, TCU work, E46 M3 SMG CSL 255 firmware, the F80 M3 and F82 M4 GTS DCT flash tune, and a ZF 8HP gearbox flash tune. Remapping and power upgrades are listed separately.

MINI and electric vehicle work

MINI servicing is treated as its own line, with coding for R50, R56, F56 and F56 BEV electric models, F56 upgrades and maintenance, cruise control retrofit, a headunit restarting solution, replacement keys, digital service history, remapping, servicing and MOT testing. For BMW i models, the site lists electric vehicle servicing, electric software updates, MOT testing, i3 coding options and electric MINI F56 BEV coding.

Customer base and practical arrangements

Although the premises are in Reading, the company states that its customers travel from across the UK, particularly from Newbury, Thatcham, Basingstoke, Oxford, Slough, Maidenhead and Windsor. It maintains a fleet of 10 courtesy cars to keep customers mobile, and claims that booking waiting times are around 80% shorter on average than those of the BMW dealer.

The site also refers to a customer referral scheme and online booking. A separate business, Refresh Automotive, at 10c Richfield Avenue, is presented for owners of other brands, with the phone number 01189777160.

Reputation as presented by the company

Grosvenor Motor Company points to more than 500 Google review ratings and describes its reputation as surpassing that of its competition, including the BMW Reading dealer. The site displays a rating of "EXCELLENT" based on 661 reviews, attributed to Google, and reproduces several individual customer comments dated between September and October 2026. These are the company's own presentation of its standing rather than an independent assessment.