German kit-car and conversion marque that evolved from Volkswagen-based buggies and a 1930s-style roadster into TÜV-approved convertible and estate conversion programs

BI Identity / Register monogram
16models on record
1970–1999recorded span
Model activity by decade
1970s1990s
About the marque
Founded
1970 – 1999
Country
Germany

Buggy-Center Bieber KG began vehicle production around 1970 at Wuppertal under the Bieber name. Its opening Dingo and later Maplex, Optimist and Speedster were open recreational cars or kits built around Volkswagen Beetle floorpans—shortened for some designs—and air-cooled flat-four powertrains. Condor departed from the beach-buggy formula with open 1930s-inspired styling. Bieber subsequently developed TÜV-approved Fresh Air conversion kits and completed conversions for customer-owned vehicles, including Volkswagen Beetle, Golf, Scirocco and Polo, Opel Kadett D and Calibra, Ford Fiesta, and Porsche 924 and 944. Some jobs could be completed in only a few days while self-build customers received a kit and engineering approval. Approximately 260 Kadett D conversions were supplied from 1985 to 1990, over half exported to the Netherlands. In 1990 the company became Bieber Cabriolet GmbH and moved to Bahnhofstraße in Borken, relocating to Landwehr 62 in 1991. It added saloon-to-estate work in 1995; the Vario-Top kits for Seat Toledo and Volvo 440 were listed for model years 1996–97 at roughly DM 4,000–4,500. Bieber's last known catalogue listing was model year 1999. The catalog distinguishes the five own-body models from eleven donor-based conversion programs and does not treat every engine or trim of the Volkswagen, Opel, Ford, Porsche, Seat or Volvo donor as a new Bieber model.

Text adapted from “Bieber” on Wikipedia ↗ · CC BY-SA 4.0 ↗

Catalog

16 models

models
Unknown
Condor

Distinct retro-styled open car rather than a beach buggy, using Volkswagen Beetle chassis and air-cooled powertrain.

CURATED
Unknown
Ford Fiesta Cabriolet Conversion

TÜV-approved Fresh Air conversion for Ford Fiesta donor bodies.

CURATED
Unknown
Maplex

Later Beetle-platform buggy, also encountered as Maplex-1. Accessible sources do not establish a defensible introduction year.

CURATED
Unknown
Optimist

Named Bieber buggy on standard or shortened Volkswagen floorpan depending on build; exact dates are unresolved.

CURATED
Unknown
Porsche 924 Cabriolet Conversion

Open conversion for Porsche 924 donor coupes; factory engine and trim variants remained donor specifications.

CURATED
Unknown
Porsche 944 Cabriolet Conversion

Bieber conversion for Porsche 944 coupes, distinct from Porsche's later factory-built 944 Cabriolet.

CURATED
Unknown
Speedster

Low open Beetle-based recreational model with fiberglass rear and engine-cover treatment; exact chronology is not preserved.

CURATED
Unknown
Volkswagen Beetle Cabriolet Conversion

TÜV-supported conversion for customer-supplied Volkswagen Beetle body shell; not confused with factory Karmann Beetle Cabriolet.

CURATED
Unknown
Volkswagen Golf Cabriolet Conversion

Fresh Air conversion offered for Golf generations I and II; donor generation and engine remained Volkswagen configurations.

CURATED
Unknown
Volkswagen Polo Cabriolet Conversion

Bieber open-body program for customer-supplied Polo shells; exact catalogue years are unavailable.

CURATED
Unknown
Volkswagen Scirocco Cabriolet Conversion

Open conversion for Scirocco I and II, sold as kit or completed work.

CURATED
1970–1989
Dingo

Opening Bieber model and first of the company's Volkswagen Beetle-based buggies; the terminal year marks the corporate shift toward Cabriolet…

CURATED
1985–1990
Opel Kadett D Cabriolet Conversion

Approximately 260 completed or do-it-yourself conversions were supplied, slightly more than half exported to the Netherlands; a complete conversion…

CURATED
1990–1999
Opel Calibra Cabriolet Conversion

Open conversion program for the Calibra coupe; dates reflect Bieber's Borken Cabriolet era, not a claim that orders occurred every year.

CURATED
1996–1997
Vario-Top Seat Toledo

Vario-Top kit converting a Seat Toledo saloon/hatchback body into an estate; priced approximately DM 4,000–4,500.

CURATED
1996–1997
Vario-Top Volvo 440

Vario-Top estate conversion for Volvo 440, offered alongside the Toledo version during two model years.

CURATED